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New species and new records of freshwater Heterolepidoderma (Gastrotricha: Chaetonotidae) from Brazil with an identification key to the genus

Garraffoni, André R. S., Melchior, Marina P. (2015): New species and new records of freshwater Heterolepidoderma (Gastrotricha: Chaetonotidae) from Brazil with an identification key to the genus. Zootaxa 4057 (4): 551-568, DOI: http://dx.doi.org/10.11646/zootaxa.4057.4.

Description of a New Scaled Species of Ptychostomella (Gastrotricha: Macrodasyida) from the Brazilian Coast and a Cladistics Analysis of the Genus

A new species of marine Gastrotricha from the north coast of São Paulo state, Brazil, is described. Adults of Ptychostomella sebastiana sp. nov. are unique in that they possess a pair of dorsolateral “rod-like” cephalic sensory organs and subrectangular scales covering the lateral body surfaces. A cladistic analysis was performed to investigate the internal relationship of the representatives of the taxa based on morphological data. Our analysis supported the monophyly of the taxon Ptychostomella, but its internal phylogenetic relationships are not well established due to the low phylogenetic signal of morphological characters used in the present study

FIGURE 5 in New species and new records of freshwater Heterolepidoderma (Gastrotricha: Chaetonotidae) from Brazil with an identification key to the genus

FIGURE 5. Heterolepidoderma mariae sp. nov. paratype. DIC photomicrographs: A) Dorsal view of distribution and shape of scales. B) Ventral view of distribution and shape of scales and cilia. White arrow indicates hypostomium. Scale bars: 22 Μm.Published as part of Garraffoni, André R. S. & Melchior, Marina P., 2015, New species and new records of freshwater Heterolepidoderma (Gastrotricha: Chaetonotidae) from Brazil with an identification key to the genus, pp. 551-568 in Zootaxa 4057 (4) on page 558, DOI: 10.11646/zootaxa.4057.4.5, http://zenodo.org/record/23511

Description of a New Scaled Species of <i>Ptychostomella</i> (Gastrotricha: Macrodasyida) from the Brazilian Coast and a Cladistics Analysis of the Genus

A new species of marine Gastrotricha from the north coast of São Paulo state, Brazil, is described. Adults of Ptychostomella sebastiana sp. nov. are unique in that they possess a pair of dorsolateral “rod-like” cephalic sensory organs and subrectangular scales covering the lateral body surfaces. A cladistic analysis was performed to investigate the internal relationship of the representatives of the taxa based on morphological data. Our analysis supported the monophyly of the taxon Ptychostomella, but its internal phylogenetic relationships are not well established due to the low phylogenetic signal of morphological characters used in the present study

FIGURES 5–9. Polycirrus paivai n in Two new species of Polycirrus (Polychaeta, Terebellidae) from Abrolhos Archipelago, Brazil

FIGURES 5–9. Polycirrus paivai n sp.: 5, ventral view of head end; 6, anterior view of notopodium from anterior thorax; 7, capillary notochaeta from anterior thorax; 8, other kind of notochaeta from anterior thorax; 9, laterial view of anterior uncinus. Scale bars 90 m (5), 22.2 m (6), 9.9 m (7,9), 20 m (8)

New records of marine gastrotricha from São Sebastião island (Brazil) and the description of a new species

Until a decade ago, the marine gastrotrich fauna of Brazil was virtually unknown, but, since then, there has been an increase in the number of reports of new and known species from the states of São Paulo, Rio de Janeiro, and Bahia. Here, we report new records of five marine gastrotrichs from sublittoral sediments around São Sebastião Island, Brazil, collected by scuba. The genus Acanthodasys (Macrodasyida), represented by two undescribed species, is reported for the first time in the Southern Hemisphere; Crasiella fonseci is reported for the first time in São Sebastião Island and outside of its type locality, and Dendrodasys aff. rubomarinus and Aspidiophorus tentaculatus (Chaetonotida) are reported for the first time in Fome Beach. Dactylopodola todaroi sp. nov. is distinguished from its congeners by the following combination of characters: red ocellar granules, four TbA with two lateral tubes longer than the two medial tubes, five TbL (1 + 1 + 3), and seven TbP. In addition to new geographic records of Gastrotricha, we provide estimates of the diversity of this taxon on the Brazilian coast, as only 3 % of the total coastline has been sampled so far. We further examine our findings in light of a recent survey of the Caribbean ecoregions. © 2016 Senckenberg Gesellschaft für Naturforschung and Springer-Verlag Berlin HeidelbergUntil a decade ago, the marine gastrotrich fauna of Brazil was virtually unknown, but, since then, there has been an increase in the number of reports of new and known species from the states of São Paulo, Rio de Janeiro, and Bahia. Here, we report new re472451459FAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOCNQP - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO2011/50317-52012/08581-02014/23856-0306558/2010-6478825/2013-7This work was supported by grants from Fundação de Amparo à Pesquisa do Estado de São Paulo – FAPESP (2011/50317-52012/08581-02014/23856-0), Conselho de Pesquisa e Desenvolvimento – CNPq (306558/2010-6478825/2013-7), and Fundo de Apoio ao Ens