RESUMO
Minute Bidessini diving beetles of the genus Neoclypeodytes Young, 1967 from Panama are reviewed. Two new species, Neoclypeodytes balkei sp. nov. and N. fortunensis sp. nov. are described from Campana, Panama Province in central Panama, and La Fortuna, Chiriqui province in western Panama, respectively. Both species differ from all congeners by the colour pattern of the elytra and the shape of the male genitalia. Additionally, we provide a short diagnosis, illustrations and a new record for N. curtulus (Sharp, 1882). Furthermore, we report on the presence of scale-like setae at the apex of median lobe of the aedeagus of N. curtulus and N. fortunensis sp. nov., a character not previously observed in Neoclypeodytes species. With the addition of these two new species, there are now three species of Neoclypeodytes known from Panama and south of Guatemala.
Assuntos
Besouros , Animais , Masculino , PanamáRESUMO
The three larval instars of Huxelhydrus syntheticus Sharp, 1882, the only species of the New Zealand endemic genus Huxelhydrus Sharp, 1882, are described and illustrated including detailed morphometric and chaetotaxic analyses of the cephalic capsule, head appendages, legs, last abdominal segment and urogomphi. Larvae of this species are characterized by the absence of the primary pore ABc, shared with all other known Bidessini larvae and therefore representing a potential synapomorphy of the tribe. Third instars of Huxelhydrus can be separated from those of all other known Bidessini genera by the following combination of characters: larger size, mandibular pore MNa located in a clearly distal position with respect to pore MNb, and presence of secondary setae on dorsal surface of protarsus, on posteroventral surface of all tarsi, and on urogomphus. First instars, on their part, can be distinguished by the presence of: an occipital suture, the primary pore PAk, a ventroapical spinula on antennomere 3, and an anterotransverse carina on meso- and metathorax.
Assuntos
Besouros , Animais , Extremidades , Larva , Mandíbula , Nova ZelândiaRESUMO
The species of the genus Copelatus Erichson, 1832 occurring in the Dominican Republic are reviewed. Five species are recorded, with recent collecting data provided for four of them. Copelatus martini sp. nov., a member of the consors species group, is described and illustrated. It is compared to the apparently similar species C. guadelupensis Legros, 1948 based on morphological characters and on partial sequences of the CO1 gene. Interesting cases of intraspecific variability in the number of elytral dorsal striae in C. martini sp. nov. and C. vitraci are discussed in the light of the traditional taxo-nomic importance of this character for species group delimitation in Copelatus. Copelatus caelatipennis Aubé, 1838 and C. vitraci Legros, 1948 are recorded for the first time from the Dominican Republic (and therefore also from Hispaniola Island). The remaining species are C. posticatus (Fabricius, 1801), and C. insolitus Chevrolat, 1863 (for the latter, pre-sence in Hispaniola is doubtful and requires confirmation). Finally, C. guadelupensis is recorded from Puerto Rico for the first time, and a checklist of the Copelatus species of the Antilles is appended.