A new marine gastrotrich from the state of São Paulo (Brazil), with a key to species of Pseudostomella (Gastrotricha, Thaumastodermatidae)

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Abstract

In previous papers, faunistic and preliminary taxonomic data on the gastrotrich communities along the coastline of the Brazilian states of Sã o Paulo and Rio de Janeiro were reported; among the over 40 records, the occurrence of several species new to science was highlighted. One of such new taxa is described here based on observation carried out on living and SEM prepared specimens. Pseudostomella dolichopoda sp. n. (Gastrotricha: Thaumastodermatidae) is the only species in the genus that attains 420 μm in total length, is covered by pentancres and possesses, among others, caudal pedicles up to 45 μm in length. Additional differences with co-generic taxa characterized by a pentancrous covering are discussed. Furthermore, a key to the described Pseudostomella species of the world based on easily discernible traits, visible in both living and formalin-fixed specimens, is provided. © M. Antonio Todaro.

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Antonio Todaro, M. (2012). A new marine gastrotrich from the state of São Paulo (Brazil), with a key to species of Pseudostomella (Gastrotricha, Thaumastodermatidae). ZooKeys, 223, 39–51. https://doi.org/10.3897/zookeys.223.3975

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