Psolus thandari Martins & Tavares 2019, sp. nov.

Psolus thandari sp. nov. (Figs. 5–6; Table1) Type material. Holotype, 5.7 mm (MZUSP 593), Campos Basin, southeastern Brazil, 21°41’S, 40°20’W, Campos Basin Monitoring Program coll., xii.1991 to i.1992, 44 m. Paratypes: same data as the holotype, 3 spms 4.5–5 mm (MZUSP 1634). Type locality. Campos Ba...

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Main Authors: Martins, Luciana, Tavares, Marcos
Format: Text
Language:unknown
Published: Zenodo 2019
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Online Access:https://dx.doi.org/10.5281/zenodo.5933838
https://zenodo.org/record/5933838
id ftdatacite:10.5281/zenodo.5933838
record_format openpolar
institution Open Polar
collection DataCite Metadata Store (German National Library of Science and Technology)
op_collection_id ftdatacite
language unknown
topic Biodiversity
Taxonomy
Animalia
Echinodermata
Holothuroidea
Dendrochirotida
Psolidae
Psolus
Psolus thandari
spellingShingle Biodiversity
Taxonomy
Animalia
Echinodermata
Holothuroidea
Dendrochirotida
Psolidae
Psolus
Psolus thandari
Martins, Luciana
Tavares, Marcos
Psolus thandari Martins & Tavares 2019, sp. nov.
topic_facet Biodiversity
Taxonomy
Animalia
Echinodermata
Holothuroidea
Dendrochirotida
Psolidae
Psolus
Psolus thandari
description Psolus thandari sp. nov. (Figs. 5–6; Table1) Type material. Holotype, 5.7 mm (MZUSP 593), Campos Basin, southeastern Brazil, 21°41’S, 40°20’W, Campos Basin Monitoring Program coll., xii.1991 to i.1992, 44 m. Paratypes: same data as the holotype, 3 spms 4.5–5 mm (MZUSP 1634). Type locality. Campos Basin, southeastern Brazil, 21°41’S, 40°20’W, 44m. Distribution. Known only from the type locality. Etymology. This species is named in honour of Prof. Ahmed Thandar, in recognition for his dedication and contributions to the taxonomy of Holothuroidea. Diagnosis. Body elongate, low profile. Dorsum covered by multi-layered imbricating scales adorned with granules on their surface. Mouth surrounded by five to seven, triangular valves of equal size, anus surrounded by variable number of small, irregular valves not distinctive between anus and body. Calcareous ring notched only in the radial plates. Ventrolateral ambulacra with two rows each of podia in each. Dorsum with knobbed, perforated plates. Venter with knobbed as well as smooth, perforated plates. Tube feet with knobbed, perforated rods and end plate. ......continued on the next page ......continued on the next pageSole ossicles Knobbed plates pseudo cups Smooth plates Knobbed cups and plates Knobbed Cups and plates Smooth plates Cups (60–190 μm) Knobbed plates Knobbed buttons Reference(s) Cherbonnier, 1974 Cherbonnier, 1974 Carriol & Féral, 1985 Carriol & Féral, 1985 Hérouard, 1901, 1906 Thandar, 2009 Ludwig & Heding, 1935 Deichmann, 1948 Ludwig & Heding, 1935 Deichmann, 1948 Description. Body elongate, of low profile, 4.5–5.7 mm long up to 2.5–2.7 mm wide (Fig. 5A). Mouth surrounded by five to seven triangular valves of equal size and anus surrounded by a variable number of small and irregular valves that intergrade with surrounding scales (Fig. 5A, B). Oral teeth lacking. Demarcation between body wall scales and oral valves distinct. Anal valves and surrounding scales poorly demarcated (Fig. 5A). Dorsum with conspicuous, imbricating scales, covered with granules (Fig. 5A; 6A, B) on their surface; lacking tube feet. Marginal dorsolateral scales of the same size as dorsal scales. Sole thin, lacking scales, tube feet restricted to ventrolateral ambulacres, arranged into two longitudinal rows with inner row of large tube feet and outer series of smaller tube feet (Fig. 5C); mid-ventral rows of tube feet absent. Polian vesicles not observed. Ten dendritic tentacles, eight large and two small ventrally. Calcareous ring simple, lacking posterior processes, radial plate notched, interradial plate not notched (Fig. 5D). Dorsum with multi-perforated, knobbed plates, with small, round holes 5–20 µm in diameter, with undulating margins and irregular in outline (90–160 µm long) (Fig. 6C). Sole with similar plates (Fig. 6D, E), and smooth, perforated plates, with undulating margins and irregular in outline (90–110 µm long) (Fig. 6F). Tube feet with curved, perforated rods, knobbed margins (100–260 µm long) (Fig. 6G, H), and end plate (100–120 µm long). (Fig. 6I). Remarks. Psolus thandari sp. nov. differs from P. vitoriae, P. antarcticus and P. patagonicus in having 6–7 oral valves instead of 5 oral valves, and in having several, inconspicuous anal valves instead of 5 conspicuous anal valves. Psolus thandari sp. nov. can be separated from P. segregratus and P. murrayi in lacking mid-ventral tube feet, present in these latter species. The new species differs from P. lawrencei in having knobbed perforated plates in the body wall, instead of cups as in P. lawrencei . It can be distinguished from P. tommasi sp. nov. by its tuberculate instead of smooth dorsal scales. : Published as part of Martins, Luciana & Tavares, Marcos, 2019, Two new species of Psolus Oken from Brazil (Holothuroidea: Psolidae), with neotype designation and redescription of Psolus vitoriae Tommasi, 1971, and a key to the southwestern Atlantic and Magellanic species, pp. 531-546 in Zootaxa 4563 (3) on pages 538-542, DOI: 10.11646/zootaxa.4563.3.7, http://zenodo.org/record/2601456
format Text
author Martins, Luciana
Tavares, Marcos
author_facet Martins, Luciana
Tavares, Marcos
author_sort Martins, Luciana
title Psolus thandari Martins & Tavares 2019, sp. nov.
title_short Psolus thandari Martins & Tavares 2019, sp. nov.
title_full Psolus thandari Martins & Tavares 2019, sp. nov.
title_fullStr Psolus thandari Martins & Tavares 2019, sp. nov.
title_full_unstemmed Psolus thandari Martins & Tavares 2019, sp. nov.
title_sort psolus thandari martins & tavares 2019, sp. nov.
publisher Zenodo
publishDate 2019
url https://dx.doi.org/10.5281/zenodo.5933838
https://zenodo.org/record/5933838
long_lat ENVELOPE(-61.833,-61.833,-64.500,-64.500)
ENVELOPE(-64.264,-64.264,-65.244,-65.244)
geographic Marcos
Buttons
geographic_facet Marcos
Buttons
genre Antarc*
antarcticus
genre_facet Antarc*
antarcticus
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op_doi https://doi.org/10.5281/zenodo.5933838
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spelling ftdatacite:10.5281/zenodo.5933838 2023-05-15T14:03:40+02:00 Psolus thandari Martins & Tavares 2019, sp. nov. Martins, Luciana Tavares, Marcos 2019 https://dx.doi.org/10.5281/zenodo.5933838 https://zenodo.org/record/5933838 unknown Zenodo http://zenodo.org/record/2601456 http://publication.plazi.org/id/876B7A01FF894F1931662D57C01EA772 http://zoobank.org/2CDCC248-043B-4E47-8F2F-78CE91702EB2 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.4563.3.7 http://zenodo.org/record/2601456 http://publication.plazi.org/id/876B7A01FF894F1931662D57C01EA772 https://dx.doi.org/10.5281/zenodo.2601466 https://dx.doi.org/10.5281/zenodo.2601468 http://zoobank.org/2CDCC248-043B-4E47-8F2F-78CE91702EB2 https://dx.doi.org/10.5281/zenodo.5933837 https://zenodo.org/communities/biosyslit Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess CC0 Biodiversity Taxonomy Animalia Echinodermata Holothuroidea Dendrochirotida Psolidae Psolus Psolus thandari article-journal ScholarlyArticle Text Taxonomic treatment 2019 ftdatacite https://doi.org/10.5281/zenodo.5933838 https://doi.org/10.11646/zootaxa.4563.3.7 https://doi.org/10.5281/zenodo.2601466 https://doi.org/10.5281/zenodo.2601468 https://doi.org/10.5281/zenodo.5933837 2022-03-10T16:32:56Z Psolus thandari sp. nov. (Figs. 5–6; Table1) Type material. Holotype, 5.7 mm (MZUSP 593), Campos Basin, southeastern Brazil, 21°41’S, 40°20’W, Campos Basin Monitoring Program coll., xii.1991 to i.1992, 44 m. Paratypes: same data as the holotype, 3 spms 4.5–5 mm (MZUSP 1634). Type locality. Campos Basin, southeastern Brazil, 21°41’S, 40°20’W, 44m. Distribution. Known only from the type locality. Etymology. This species is named in honour of Prof. Ahmed Thandar, in recognition for his dedication and contributions to the taxonomy of Holothuroidea. Diagnosis. Body elongate, low profile. Dorsum covered by multi-layered imbricating scales adorned with granules on their surface. Mouth surrounded by five to seven, triangular valves of equal size, anus surrounded by variable number of small, irregular valves not distinctive between anus and body. Calcareous ring notched only in the radial plates. Ventrolateral ambulacra with two rows each of podia in each. Dorsum with knobbed, perforated plates. Venter with knobbed as well as smooth, perforated plates. Tube feet with knobbed, perforated rods and end plate. ......continued on the next page ......continued on the next pageSole ossicles Knobbed plates pseudo cups Smooth plates Knobbed cups and plates Knobbed Cups and plates Smooth plates Cups (60–190 μm) Knobbed plates Knobbed buttons Reference(s) Cherbonnier, 1974 Cherbonnier, 1974 Carriol & Féral, 1985 Carriol & Féral, 1985 Hérouard, 1901, 1906 Thandar, 2009 Ludwig & Heding, 1935 Deichmann, 1948 Ludwig & Heding, 1935 Deichmann, 1948 Description. Body elongate, of low profile, 4.5–5.7 mm long up to 2.5–2.7 mm wide (Fig. 5A). Mouth surrounded by five to seven triangular valves of equal size and anus surrounded by a variable number of small and irregular valves that intergrade with surrounding scales (Fig. 5A, B). Oral teeth lacking. Demarcation between body wall scales and oral valves distinct. Anal valves and surrounding scales poorly demarcated (Fig. 5A). Dorsum with conspicuous, imbricating scales, covered with granules (Fig. 5A; 6A, B) on their surface; lacking tube feet. Marginal dorsolateral scales of the same size as dorsal scales. Sole thin, lacking scales, tube feet restricted to ventrolateral ambulacres, arranged into two longitudinal rows with inner row of large tube feet and outer series of smaller tube feet (Fig. 5C); mid-ventral rows of tube feet absent. Polian vesicles not observed. Ten dendritic tentacles, eight large and two small ventrally. Calcareous ring simple, lacking posterior processes, radial plate notched, interradial plate not notched (Fig. 5D). Dorsum with multi-perforated, knobbed plates, with small, round holes 5–20 µm in diameter, with undulating margins and irregular in outline (90–160 µm long) (Fig. 6C). Sole with similar plates (Fig. 6D, E), and smooth, perforated plates, with undulating margins and irregular in outline (90–110 µm long) (Fig. 6F). Tube feet with curved, perforated rods, knobbed margins (100–260 µm long) (Fig. 6G, H), and end plate (100–120 µm long). (Fig. 6I). Remarks. Psolus thandari sp. nov. differs from P. vitoriae, P. antarcticus and P. patagonicus in having 6–7 oral valves instead of 5 oral valves, and in having several, inconspicuous anal valves instead of 5 conspicuous anal valves. Psolus thandari sp. nov. can be separated from P. segregratus and P. murrayi in lacking mid-ventral tube feet, present in these latter species. The new species differs from P. lawrencei in having knobbed perforated plates in the body wall, instead of cups as in P. lawrencei . It can be distinguished from P. tommasi sp. nov. by its tuberculate instead of smooth dorsal scales. : Published as part of Martins, Luciana & Tavares, Marcos, 2019, Two new species of Psolus Oken from Brazil (Holothuroidea: Psolidae), with neotype designation and redescription of Psolus vitoriae Tommasi, 1971, and a key to the southwestern Atlantic and Magellanic species, pp. 531-546 in Zootaxa 4563 (3) on pages 538-542, DOI: 10.11646/zootaxa.4563.3.7, http://zenodo.org/record/2601456 Text Antarc* antarcticus DataCite Metadata Store (German National Library of Science and Technology) Marcos ENVELOPE(-61.833,-61.833,-64.500,-64.500) Buttons ENVELOPE(-64.264,-64.264,-65.244,-65.244)