RESUMO

Two species of genera Apoprionospio and Prionospio are described from the Colombian Caribbean. Apoprionospio sanguarensis sp. nov. and Prionospio gabriellae sp. nov. are new to science. Apoprionospio sanguarensis sp. nov. is distinguished from the three previously described Apoprionospio species by having the smallest body size, triangular prostomium, three pairs of eyes, the branchial pairs 1-3 are cirriform, wrinkled, the anterior notochaetae arranged from chaetiger 2 onwards arranged in three rows, and all hooded hooks lack secondary hoods. Prionospio gabriellae sp. nov. is distinguished from all Prionospio species with five branchial pairs by having dorsal crests across the dorsum on chaetigers 16-25. Closely related species are P. heterobranchia Moore, 1907 and P. caribensis Delgado-Blas, 2014 and Prionospio gabriellae sp. nov. differs from both species in that it has a small medial peak in the dorsal region of prostomium, the first neuropodial lamellae is very small, the shaped of branchial pairs 2 and 3 are cirriform, neuropodial postchaetal lamellae on chaetiger 2 is square, all chaetae of chaetiger 1 are arranged in a row. We propose raising the status of Apoprionospio dayi japonica Imajima, 1989 to the species level as A. japonica Imajima, 1989. A key and a table detailing the most relevant characters of Apoprionospio species and a key to all species of Prionospio with five pairs of branchiae are provided.

Assuntos

Anelídeos , Poliquetos , Animais , Colômbia , Região do Caribe , Tamanho Corporal

RESUMO

Víctor H. Delgado-Blas and Luis F. Carrera-Parra (2018) A cladistic analysis of Paraprionospio was conducted based on the revision of some type materials and the original descriptions of some species. The phylogenetic reconstruction of Paraprionospio using parsimony analysis of 45 morphological characters yielded one most parsimonious tree (CI = 0.45, RI = 0.54). Herein, thirteen Paraprionospio species were considered to be valid, and one new species was described: Paraprionospio pinnata (Ehlers, 1901), P. inaequibranchia (Caullery, 1914), P. africana (Augener, 1918), P. alata (Moore, 1923), P. treadwelli (Hartman, 1951), P. lamellibranchia Hartman, 1974, P. coora Wilson, 1990, P. tamaii Delgado-Blas, 2004, P. yokoyamai Delgado-Blas, 2004, P. cordifolia Yokoyama, 2007, P. oceanensis Yokoyama, 2007, P. patiens Yokoyama, 2007, P. cristata Zhou, Yokoyama and Li, 2008, and P. dibranchiata sp. nov. This species is characterized by having two pairs of branchiae on chaetigers 1-2, the first pair pinnate with few pinnules, the second one cirriform; and with a long filament at the base of third notopodial lamella on chaetiger 3. Also, P. alata, P. treadwelli and P. inaequibranchia were redescribed based upon type material, and several morphological features were included to clarify the taxonomic status of P. treadwelli, P. tamaii and P. yokoyamai, which were previously considered synonyms of P. alata. A taxonomic key to all Paraprionospio species is provided.