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Abstract The abundance of spiders in most terrestrial ecosystems makes them good indicators of habitat changes because they are common animals in most terrestrial ecosystems. Due to the importance of knowing the diversity of spiders for conservation efforts and the lack of studies on the spider fauna in urban parks, this work aimed to collect and identify the diversity of spiders present in an isolated fragment of native Atlantic Rainforest vegetation, in an urban area on Diadema, São Paulo. We used pitfall traps over 28 days and active nocturnal search for two hours per night over 6 nights as collection methods. We found a total of 328 individuals, of which 118 adult spiders were assigned to 13 families and 37 morphospecies. Species of families Nemesiidae, Theraphosidae and Deinopidae were found, which are not expected in urban areas. The highest values of abundance were found for the Theridiidae family, with 59 individuals and Araneidae with 28, totaling 73.7% of the total sampled, with Nephilingis cruentata and Parasteatoda tepidariorum being the most abundant morphospecies, with 15 and 11 adult individuals collected, respectively. The richness found in this work was 37 morphospecies and according to the diversity estimators Chao 1 and 2 and Jacknife 1 and 2, it was estimated that the richness of the Diadema Botanical Garden is between 44 and 54 species, a result close to the number of species collected, which indicates that the sampling effort of this work was satisfactory. This work is one of the few inventories of spider fauna in urban fragments of the Atlantic Rainforest and the first study in the Diadema city, one of the cities with the highest population density in the country. It is important to empathize that the results showed a rich and diverse araneofauna when compared with other similar studies, even in an extremely isolated fragment in one of the cities with the highest population density in the state. Public policies specifically aimed at the conservation of these areas should be encouraged so that their preservation is secured.

Resumo As aranhas são um dos predadores generalistas mais abundantes na maioria dos ecossistemas terrestres, tornando-as bons indicadores de mudanças de habitat, uma vez que são animais comuns na maioria dos ecossistemas terrestres. Devido à importância do conhecimento da diversidade de aranhas para os esforços de conservação e à falta de estudos sobre a aracnídeos em parques urbanos, este trabalho teve como objetivo coletar e identificar a diversidade de aranhas presentes em um fragmento isolado de vegetação nativa da Mata Atlântica, em um ambiente área urbana de Diadema, São Paulo. Utilizamos armadilhas de queda ao longo de 28 dias e busca noturna ativa durante duas horas por noite, ao longo de 6 noites como métodos de coleta. Encontramos um total de 328 indivíduos, dos quais 118 aranhas adultas foram distribuídas em 13 famílias e 37 morfoespécies. Foram encontradas espécies das famílias Nemesiidae, Theraphosidae e Deinopidae, que não são esperadas em áreas urbanas. Os maiores valores de abundância foram encontrados para a família Theridiidae, com 59 indivíduos e Araneidae com 28, totalizando 73,7% do total amostrado, sendo Nephiliengis cruentata e Parasteatoda tepidariorum as morfoespécies mais abundantes, com 15 e 11 indivíduos adultos coletados, respectivamente. A riqueza encontrada neste trabalho foi de 37 morfoespécies e de acordo com os estimadores de diversidade Chao 1 e 2 e Jacknife 1 e 2, estimou-se que a riqueza do Jardim Botânico de Diadema está entre 44 e 54 espécies, resultado próximo ao número de espécies coletadas, o que indica que o esforço amostral deste trabalho foi satisfatório. Este trabalho é um dos poucos inventários da aracnídeos em fragmentos urbanos de Mata Atlântica e o primeiro estudo na cidade de Diadema, uma das cidades com maior densidade populacional do pais. É importante ressaltar que os resultados mostraram uma araneofauna rica e diversa quando comparado com outros estudos similares, mesmo em um fragmento extremamente isolado em uma das cidades com maior densidade populacional do estado. Políticas públicas voltadas especificamente à conservação dessas áreas devem ser incentivadas para que sua preservação seja garantida.

RESUMO

A new species, Strotarchus chamevazquezi sp. nov., is described based on both sexes from Department Francisco Morazán, Honduras. A detailed description, diagnosis, photographs, and distribution map of the new species are given. This is the first species of this genus recorded from Honduras.

RESUMO

The Atlantic Forest is known for its richness and diversity of species. Nonetheless, the diversity of millipedes in the biome is still poorly known. In this work, the distribution and the faunal composition of millipedes of the family Spirostreptidae Brandt, 1833 (order Spirostreptida) from the Atlantic Forest are provided. A total of 159 occurrence points were compiled, and 59 species in 17 genera were listed. Gymnostreptus Brölemann, 1902 was recovered as the richest genus in the Atlantic Forest with 14 species and one subspecies. The species Plusioporus setiger (Brölemann, 1902) presented the highest number of records, with 22 occurrence points in at least 20 municipalities. A total of 35 species were recorded from only one municipality. Considering all the threats on the biome, this paper is important for our understanding of the Brazilian millipede fauna and can be useful to determine places that require valuations for collecting efforts and conservation policies.

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The new genus Tropicosa is proposed based on species of some controversial Neotropical genera of lycosids. These spiders present a longitudinal dark stripe over the sternum in both sexes, median apophysis sinuous, tegular lobe evidently sclerotized and the epigyne with median septum anteriorly expanded and with a parallel, triangular hood. We transfer Alopecosa moesta (Holmberg), Schizocosa chelifasciata (Mello-Leitão) and Lycosa thorelli (Keyserling) to Tropicosa gen. nov. and describe one new species, Tropicosa baguala sp. nov. Likewise, Arctosa bogotensis (Keyserling) is synonymized with Tropicosa thorelli (Keyserling) comb. nov., and Lycosa langei Mello-Leitão with T. chelifasciata (Mello-Leitão) comb. nov. based on examined types. All the four species proposed as members of Tropicosa gen. nov. have South American distribution.

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Tenedos O. Pickard-Cambridge, 1897, is the most diverse arrangement of Neotropical zodariids. The genus is composed by several species group, which only the barronus group is formally recognized. However, several groups remain uncharacterized despite being easily distinguishable by the distinctive sexual morphology. We formally proposed a second species group in Tenedos, the trilobatus group, including the known species Tenedos trilobatus Jocqu & Baert, 2002 from Colombia and T. figaro Jocqu & Baert, 2002 from Ecuador, whose type specimens are redescribed herein. Seven new species of the trilobatus group from Colombia are proposed based on both sexes: T. anchicaya sp. n. (), T. chiribiquete sp. n. (), T. cumbre sp. n. (), T. gabi sp. n. (), T. quimbaya sp. n. (), T. huila sp. n. (), T. valle sp. n. (). New data on the distribution range of Tenedos trilobatus in Colombia are included. We further provide distribution maps and an identification key for all species of the group. Morphological remarks of the new group and a comparison of it with the barronus group are included.

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Abstract Somatic characters are shared by many Chelodesmidae groups, and generic placement and species identifications traditionally have been based on gonopodal morphology. Female genitalic characters have been largely neglected and are rarely photographed or illustrated. This is rather unfortunate as the morphology of female genitalia presents important characters and may be decisive for developing a more robust family classification. We describe the heretofore unknown female of Sandalodesmus araujoi (Schubart, 1946), previously known only from the male holotype collected in São Paulo, Brazil in December 1943; discuss the utility of female genitalic characters for species delineation in Sandalodesmus; and report the first case of a mass occurrence in the Chelodesmidae. While an attempt at a formal diagnosis of Sandalodesmus females based on genitalic characters is premature, the vulvar morphology of the three taxa examined in this study suggests that female genitalia are species-specific. Some characters (i.e., asymmetric valves, presence of digitiform projections and reduction of setae on the internal basal portion of the valves) are constant between the species, suggesting utility for generic-level delineation. Mass occurrences of millipedes are typically unpredictable and likely related to variations in environmental conditions and/or anthropogenic modifications of natural habitats. Although the mass occurrence of S. araujoi reported herein was only observed once, the event coincides with the mating period of millipedes during the rainy season in Brazil. On the other hand, the region where the species was found has been the target of intense urban development, including replacement of natural habitats with residential areas, which may have influenced its population dynamics.

Resumo Os caracteres somáticos são compartilhados por muitos grupos de Chelodesmidae, e o posicionamento genérico e as identificações de espécies tradicionalmente têm sido baseadas na morfologia do gonópodo. Carateres genitais das fêmeas foram amplamente negligenciados e raramente são fotografados ou ilustrados. Isso é lamentável, pois a morfologia da genitália feminina apresenta características importantes e pode ser decisiva para o desenvolvimento de uma classificação mais robusta. Neste trabalho, descrevemos a até então desconhecida fêmea de Sandalodesmus araujoi (Schubart, 1946), anteriormente conhecida apenas pelo holótipo macho coletado em São Paulo, Brasil, em dezembro de 1943; discutimos a utilidade de caracteres genitais femininos para delineamento de espécies em Sandalodesmus; e relatamos o primeiro caso de ocorrência em massa para Chelodesmidae. Embora uma tentativa de diagnose formal para fêmeas de Sandalodesmus com base em caracteres genitais seja prematura, a morfologia vulvar dos três táxons examinados neste estudo, sugere que a genitália feminina é espécie-específica. Alguns caracteres (e.g. válvulas assimétricas, presença de projeções digitiformes e redução de cerdas na margem interna das válvas) são constantes entre as espécies do gênero, sugerindo utilidade para delineamento em nível genérico. Ocorrências em massa de milípedes são tipicamente imprevisíveis e provavelmente relacionadas a variações nas condições ambientais e/ou modificações antropogênicas de habitats naturais. Embora a ocorrência em massa de S. araujoi aqui relatada tenha sido observada apenas uma vez, o evento coincide com o período de reprodução dos milípedes durante a estação chuvosa no Brasil. Por outro lado, a região onde a espécie foi encontrada tem sido alvo de intenso desenvolvimento urbano, incluindo substituição de habitats naturais por áreas residenciais, o que pode ter influenciado sua dinâmica populacional.

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Salticidae is the most diverse family of Araneae and in Brazil, there are 667 species. Among these species, five are synanthropic exotics: Plexippus paykulli (Audouin, 1826), Hasarius adansoni (Audouin, 1826), Menemerus bivittatus (Dufour, 1831), M. nigli Wesolowska & Freudenschuss, 2012 and Thyene coccineovittata (Simon, 1886). To understand the current distribution of these species in Brazil, seven collections of 643 lots were examined from seven Brazilian zoological collections. The synanthropic exotic species with the highest records were Plexippus paykulli, Menemerus bivittatus, and Hasarius adansoni, generally collected and associated with human dwellings and buildings. They are present in all regions (North, Northeast, Midwest, and South macro-regions), with the largest region, in all regions of the country in 22 states and 98 municipalities, followed by Hasarius adansoni in 17 states and 88 municipalities, Menemerus bivittatus in 19 states and 68 municipalities. Menemerus nigli and Thyene coccineovittata are from recent introductions that occurred in the city of Rio de Janeiro, Rio de Janeiro, Brazil.(AU)

Salticidae é a família mais diversa de Araneae e no Brasil ocorrem 667 espécies, dentre elas cinco são exóticas sinantrópicas: Plexippus paykulli (Audouin, 1826), Menemerus bivittatus (Dufour, 1831), Hasarius adansoni (Audouin, 1826), Menemerus nigli Wesolowska & Freudenschuss, 2012 e Thyene coccineovittata (Simon, 1886). Foram examinados 643 lotes destas cinco espécies no Brasil, depositados em sete coleções zoológicas brasileiras. As espécies exóticas sinantrópicas com maior número de registros foram Plexippus paykulli, Hasarius adansoni e Menemerus bivittatus, na maioria dos casos coletadas associadas a habitações e edificações humanas. Elas estão presentes em todas as macrorregiões do país (Norte, Nordeste, Centro-Oeste, Sudeste e Sul), sendo P. paykulli a que possui a maior distribuição, ocorrendo em 22 estados e 98 municípios, seguido de H. adansoni em 17 estados e 88 municípios e M. bivittatus em 19 estados e 68 municípios. Menemerus nigli e Thyene coccineovittata, são introduções recentes, ocorrendo apenas na cidade do Rio de Janeiro, Rio de Janeiro, Brasil.(AU)

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In this paper a new species of Diphya Nicolet, 1849, D. napo sp. nov. is described based on males and females from Ecuador. The female of Diphya bicolor Vellard, 1926 is described and illustrated for the first time and new records are presented. Oarces ornatus Mello-Leitão, 1935 and Azilia eximia (Mello-Leitão, 1940) are synonymized with D. bicolor, being A. eximia removed from the synonym of Azilia Keyserling, 1881 and being Cardimia Mello-Leitão, 1940 considered synonym of Diphya.(AU)

Neste artigo uma nova espécie de Diphya Nicolet, 1849, D. napo sp. nov. é descrita com base em machos e fêmeas do Equador. A fêmea de Diphya bicolor Vellard, 1926 é descrita e ilustrada pela primeira vez e registros novos são apresentados. Oarces ornatus Mello-Leitão, 1935 e Azilia eximia (Mello-Leitão, 1940) são sinonimizadas com D. bicolor, sendo A. eximia retirada da sinonímia de Azilia Keyserling, 1881 e Cardimia Mello-Leitão, 1940 é considerado sinônimo de Diphya.(AU)

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The genus Tenedos O. Pickard-Cambridge, 1897 is the most diverse among Neotropical Zodariids. It is composed of 44 species, fourteen of which occur in Brazil, while in Colombia, the diversity of the genus is poorly known, with only seven species recorded for the country. Based on genital morphology, several species groups can be distinguished within the genus, but these have not been formally established. We propose the species group barronus to include 41 species, 34 of which are distributed in Colombia and the other seven exclusively occurring in: Brazil (one Amazonian species), Peru (three Andean species), and Venezuela (three Andean species). The previously proposed species Tenedos andes Jocqu Baert, 2002; T. peckorum Jocqu Baert, 2002; T. jocquei Quijano Galvis, 2018 and T. capote Jocqu Baert, 2002 are redescribed based on the type material and the females of the two former species are described for the first time. T. barronus (Chamberlin, 1925) and T. persulcatus Jocqu Baert, 2002 are reported for Colombia for the first time, the female of the latter is described. Twenty-eight new species are herein described, illustrated and their distributions are represented (species listed according to morphological affinities): T. ayo sp. n. (), T. calebi sp. n. (), T. caqueta sp. n. (), T. choco sp. n. (), T. cofan sp. n. (), T. dankittipakuli sp. n. (), T. eberhardi sp. n. (), T. neitai sp. n. (), T. tama sp. n. (), T. griswoldi sp. n. (), T. guacharos sp. n. (), T. henrardi sp. n. (), T. humboldti sp. n. (), T. carlosprietoi sp. n. (), T. narinensis sp. n. (), T. mesa sp. n. (), T. macagual sp. n. (), T. marquetones sp. n. (), T. medina sp. n. () , T. pensilvania sp. n. (), T. piedecuesta sp. n. (), T. quipile sp. n. (), T. santarosa sp. n. (), T. luzmarinae sp. n. (), T. tatama sp. n. (), T. ticuna sp. n. (), T. wayuu sp. n. () and T. yurayaco sp. n. (). We further provide new morphological data for some species included in the barronus group, and briefly discuss some aspects on morphological affinities and distribution between the species, based on a comparison with Tenedos type species, T. lautus O. Pickard-Cambridge, 1897. Distribution maps for all Colombian species, including new records for T. barronus and T. persulcatus, are also herein included. Additionally, an identification key for all species of the barronus group is provided.

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Mecophilus carioca n. sp. is described based on males and females recently sampled in the Parque Nacional de Itatiaia, and is the first record of the genus from the state of Rio de Janeiro, Brazil. The specimens were analyzed in both light microscopy and scanning electron microscopy, and photos and schematic illustrations are provided. The known distribution of the three species of Mecophilus are presented in a map.

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After recent sampling in the Southeast and Northeast of Brazil, six new species of Aphilodon are described and illustrated based on males and females. From the Atlantic Forest biome, Aphilodon foraminis n. sp., A. aiuruocae n. sp., A. acutus n. sp. and A. rectitibia n. sp. were registered in the state of Rio de Janeiro. Aphilodon cangaceiro n. sp. is the first record of Aphilodontinae for the state of Piau and was sampled in the Caatinga biome. Aphilodon bahianus n. sp. is the first species of Aphilodontinae known for the state of Bahia, being registered from the Atlantic Forest and in the Caatinga biomes. Additionally, some morphological characteristics of all known species of Aphilodon and their distributions are compared.

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The millipede species Taulidesmella tabatinga is known from the border of Brazil with Peru and Colombia, Iquitos (Peru), and environs of Manaus (Brazil). Based on freshly collected material during the rainy season in 2014 along the Amazon River upriver from its confluence with the Negro River, we report a new record of T. tabatinga in floodplain forests in the municipality of Alvarães, Amazonas state (Brazil), filling a gap of 1,000 km between its previously known occurrence points. This record indicates that T. tabatinga is likely widespread along both margins of the upper Amazon River, mostly associated with tree trunks and litter of riparian and floodplain forests.(AU)

A espécie de Diplopoda Taulidesmella tabatinga é conhecida apenas da região de fronteira entre o Brasil com Peru e Colômbia, Iquitos (Peru), e arredores de Manaus (Brasil). Com base em material coletado recentemente durante a estação chuvosa em 2014 ao longo do Rio Amazonas a montante da confluência com o Rio Negro, nós reportamos um novo registro para T. tabatinga em florestas de várzea no município de Alvarães, Amazonas, preenchendo uma lacuna de 1000 km entre seus pontos de ocorrência previamente conhecidos. Este novo registro indica que T. tabatinga provavelmente é amplamente distribuída ao longo de ambas margens do alto do Rio Amazonas, principalmente associada a troncos de árvores e serapilheira de matas ciliares e inundáveis.(AU)

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The diversity of endotherms and ectotherms may be differently affected by ambient temperature and net primary productivity (NPP). Additionally, little is known about how these drivers affect the diversity of guilds of different trophic levels. We assessed the relative role of temperature and NPP in multitrophic guilds of ectothermic (arthropods: ants, ground beetles, spiders, and harvestmen) and endothermic (large mammals) animals along a tropical elevational gradient. We sampled arthropods at eight elevation belts and large mammals at 14 elevation belts in Atlantic rainforest (ranging from 600 to 2450 m.a.s.l.) of Itatiaia National Park, Southeast Brazil. Overall arthropod species richness was more associated with temperature than overall large-mammal species richness, while the latter was more associated with NPP. When separated into trophic guilds, we found that the species richness associated with NPP increased across arthropod trophic levels from herbivores to predators. Conversely, although NPP influenced large-mammal herbivore species richness, its effects did not seem to accumulate across large-mammal trophic levels since the species richness of large-mammal omnivores was more associated with temperature and none of the variables we studied influenced large-mammal predators. We suggest that thermal physiological differences between ectotherms and endotherms are responsible for the way in which arthropods and large mammals interact with or are constrained by the environment. Furthermore, the inconsistency regarding the role of temperature and NPP on species richness across multitrophic guilds of ectotherms and endotherms could indicate that thermal physiological differences might also interfere with energy use and flux in the food web.

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The species of Patrera Simon, 1903 from Brazilian Atlantic Forest biome are revised. With more than 2715 specimens examined, nine species were found and, of these, only one new species is described, Patrera teresopolis n. sp. from state of Rio de Janeiro. The other valid names were described by a single author: Patrera procera (Keyserling, 1891), P. longipes (Keyserling, 1891), P. virgata (Keyserling, 1891), P. cita (Keyserling, 1891), P. tensa (Keyserling, 1891), n. comb., P. opertanea (Keyserling, 1891), n. comb., P. concolor (Keyserling, 1891), n. comb. and P. recentissima (Keyserling, 1891), n. comb. (Later four here transferred from Teudis O. Pickard-Cambridge, 1896) and P. pellucida (Keyserling, 1891), n. comb. (here transferred from Sillus F.O. Pickard-Cambridge, 1900). The males of Patrera opertanea, P. pellucida and P. recentissima are described for the first time. The species Teudis itatiayae Mello-Leitão, 1915 and Sillus delicatus Mello-Leitão, 1922 are synonymized with P. longipes; Osoriella pallidoemanu Mello-Leitão, 1926 is synonymized with P. concolor. All species are described, illustrated and mapped. The known distribution of Patrera procera and P. longipes is expanded to Argentina and that of Patrera procera to Paraguay.

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The first two anophthalmic species of spiders of the genus Ochyrocera Simon, 1892, are described for caves located in the iron formation of Floresta Nacional (FLONA) de Carajás in southeastern Pará State, Brazil. The caves are located in the municipalities of Parauapebas and Canaã dos Carajás, in the eastern portion of the Amazon Forest domain. Ochyrocera ritxoco sp. nov. and O. ritxoo sp. nov. are described based on males and females. The species have similar body characteristics with the total absence of eyes and complete depigmentation, characteristics that indicate possible evolution in subterranean environments , and thus are classified as troglobites. Each species is associated with a single geomorphological unit (mountain range), with Ochyrocera ritxoco sp. nov. being restricted to caves of Serra Norte (North Mountain) and O. ritxoo sp. nov. to caves of Serra Sul (South Mountain). Both species were collected in aphotic zones of the caves. Small and tangled webs of O. ritxoco sp. nov. were observed under blocks of stone in the soil or in cracks of the walls.

RESUMO

The knowledge on the diversity of the genus Patrera Simon in Colombia is widely expanded. P. auricoma (L. Koch, 1866) and P. armata (Chickering, 1940) are redescribed and their females are described for the first time and recorded from Cundinamarca and Meta departments, respectively. Aysha strandi (Caporiacco, 1947) is synonymized with P. armata. Three species groups in the genus Patrera are proposed to include the bulk of its species (fulvastra, florezi, and philipi). These groups are diagnosed based on sexual characters. Twenty-five new species are herein described, illustrated and mapped: P. anchicaya n. sp. (♂♀); P. barbacoas n. sp. (♂); P. borjai n. sp. (♂♀); P. danielae n. sp. (♂♀); P. dimar n. sp. (♂♀); P. perafani n. sp. (♂♀); P. platnicki n. sp. (♂); P. quillacinga n. sp. (♂♀), and P. ramirezi n. sp. (♂♀) into the fulvastra species group. P. bonaldoi n. sp. (♂♀); P. boteroi n. sp. (♂); P. carvalhoi n. sp. (♂♀); P. florezi n. sp. (♂♀); P. perijaensis n. sp. (♀); P. quimbaya n. sp. (♂♀); P. sampedroi n. sp. (♂); P. yukpa n. sp. (♂♀), and P. wiwa n. sp. (♂♀) in florezi species group. P. sutu n. sp. (♂); P. chucurui n. sp. (♂♀); P. dawkinsi n. sp. (♂); P. dentata n. sp. (♂); P. dracula n. sp. (♂); P. kuryi n. sp. (♂♀), and P. longitibialis n. sp. (♂) in philipi species group. We also briefly discuss some aspects of the species groups' genital morphology, based on a comparison with the type, P. fulvastra Simon. Additionally, distribution maps for all Colombian species including new records for P. armata (Chickering, 1940), P. auricoma (L. Koch, 1866) and P. suni Dupérré Tapia, 2016 from Cundinamarca, Meta and Nariño departments are also herein included.

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This study concerns the diplopod genus Eucampesmella Schubart, 1955, widespread in Brazil. After this work, the genus includes 12 valid species, and three incertae sedis: E. pugiuncula (Schubart, 1946), E. brunnea Kraus, 1959 and E. schubarti Kraus, 1957. The type-species, Eucampesmella tricuspis (Attems, 1931), is redescribed based on the holotype, and the following six new Brazilian species are added: Eucampesmella macunaima sp. nov. from the states of Rondônia, Pará, and Piauí; E. capitu sp. nov. from the states of Piauí and Paraíba; E. brascubas sp. nov. from the state of Sergipe; E. iracema sp. nov. from the state of Pernambuco; E. pedrobala sp. nov. from the state of Ceará; and E. lalla sp. nov. from the state of Rio Grande do Norte. Furthermore, E. lartiguei ferrii (Schubart, 1956) is recognized as a junior synonym of E. lartiguei lartiguei (Silvestri, 1897), which also had its status changed, and E. sulcata (Attems, 1898) is revalidated, prevailing under the name Leptodesmus tuberculiporus Attems, 1898. In addition, drawings, diagnoses, and distribution maps for all species of the genus are provided.(AU)

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Abstract: The Mid-Domain Effect (MDE) and the Rapoport (RE) effect are two biogeographical theories that make predictions about biogeogaphic patterns. MDE predicts higher richness in the central portions of a gradient if it is within a bounded domain. RE predicts a positive relation between altitude and species range size along an altitudinal gradient. Our aim was to document the distribution of spider species richness along an altitudinal gradient in the Brazilian Amazon, and to test the influence of MDE and RE on the diversity patterns. Our study was conducted at the Pico da Neblina (Amazonas state, Brazil), and we sampled spiders at six different altitudes using two methods: nocturnal hand sampling and a beating tray. We obtained 3,140 adult spiders from 39 families, sorted to 529 species/morphospecies. Richness declined continuously with an altitude increase, but the fit with the MDE richness estimates was very weak and was not significant. Range size was not related to altitude, i. e., no RE. Finally, the abundance distribution within each species range varied more specifically, which prevented the occurrence of a RE at the community level. The influence of MDE was extremely low, a consequence of our community characteristics, formed mostly by small range size species. Short and medium range species were located at all altitudes, preventing a significant relation between range size and altitude. The distribution of abundance within a species range varied specifically and do not support a RE hypothesis.

Resumo: O Efeito do Domínio Central (MDE) e o Efeito Rapoport (ER) são duas teorias biogeografias que fazem previsões sobre a distribuição da diversidade ao longo de gradientes. O MDE prevê maior riqueza nas porções centrais de um gradiente, se este estiver dentro de um domínio fechado. O ER prevê uma relação positiva entre altitude e tamanho da distribuição ao longo do gradiente altitudinal. Nosso objetivo foi o de registrar a distribuição de uma comunidade de aranhas ao longo de um gradiente altitudinal na Amazônia Brasileira, e testar se há uma influência do EDC e do ER sobre os padrões de diversidade da comunidade. Nosso estudo foi feito no Parque Nacional do Pico da Neblina (AM, Brasil), e nós amostramos aranhas em seis altitudes diferentes. Nós coletamos 3.140 exemplares adultos de 39 famílias, que foram divididos em 529 espécies/morfoespécies. A riqueza declinou com o aumento de altitude, mas o padrão não mostrou ajuste com as previsões feitas pelo EDC. O tamanho da distribuição altitudinal também não esteve relacionado ao previsto pelo ER. Por fim, a distribuição de abundância ao longo da distribuição altitudinal das espécies variou de maneira específica, o que impediu a ocorrência de um ER nos padrões da comunidade. A influência do EDC sobre os padrões observados foi baixíssima, uma consequência de características de nossa comunidade, já que esta é formada por espécies com pequena distribuição altitudinal. Espécies de distribuição altitudinal médias e grandes ocorreram em todas as partes do gradiente o que impediu a ocorrência de um ER. Por fim, o ER também não foi observado na distribuição de abundância das espécies ao longo do gradiente, já que essa variou de maneira específica.

RESUMO

This study concerns the diplopod genus Eucampesmella Schubart, 1955, widespread in Brazil. After this work, the genus includes 12 valid species, and three incertae sedis: E. pugiuncula (Schubart, 1946), E. brunnea Kraus, 1959 and E. schubarti Kraus, 1957. The type-species, Eucampesmella tricuspis (Attems, 1931), is redescribed based on the holotype, and the following six new Brazilian species are added: Eucampesmella macunaima sp. nov. from the states of Rondônia, Pará, and Piauí; E. capitu sp. nov. from the states of Piauí and Paraíba; E. brascubas sp. nov. from the state of Sergipe; E. iracema sp. nov. from the state of Pernambuco; E. pedrobala sp. nov. from the state of Ceará; and E. lalla sp. nov. from the state of Rio Grande do Norte. Furthermore, E. lartiguei ferrii (Schubart, 1956) is recognized as a junior synonym of E. lartiguei lartiguei (Silvestri, 1897), which also had its status changed, and E. sulcata (Attems, 1898) is revalidated, prevailing under the name Leptodesmus tuberculiporus Attems, 1898. In addition, drawings, diagnoses, and distribution maps for all species of the genus are provided.(AU)

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RESUMO

ABSTRACT This study concerns the diplopod genus Eucampesmella Schubart, 1955, widespread in Brazil. After this work, the genus includes 12 valid species, and three incertae sedis: E. pugiuncula (Schubart, 1946), E. brunnea Kraus, 1959 and E. schubarti Kraus, 1957. The type-species, Eucampesmella tricuspis (Attems, 1931), is redescribed based on the holotype, and the following six new Brazilian species are added: Eucampesmella macunaima sp. nov. from the states of Rondônia, Pará, and Piauí; E. capitu sp. nov. from the states of Piauí and Paraíba; E. brascubas sp. nov. from the state of Sergipe; E. iracema sp. nov. from the state of Pernambuco; E. pedrobala sp. nov. from the state of Ceará; and E. lalla sp. nov. from the state of Rio Grande do Norte. Furthermore, E. lartiguei ferrii (Schubart, 1956) is recognized as a junior synonym of E. lartiguei lartiguei (Silvestri, 1897), which also had its status changed, and E. sulcata (Attems, 1898) is revalidated, prevailing under the name Leptodesmus tuberculiporus Attems, 1898. In addition, drawings, diagnoses, and distribution maps for all species of the genus are provided.