Leitoscoloplos plataensis Blake, 2017, new species
Leitoscoloplos plataensis new species Figures 9 F, 10 Material examined. Uruguay, off the mouth of the Rio de la Plata, IBM Sta. N- 242, 63 m (2, USNM 1013639); Sta. N- 260, 144 m (1, USNM 1013638); Sta. N-1073, 115– 117 m (3, USNM 1013637); Sta. 1074, 35°29′S, 53°01′W, 112 m, holotype and 2 paratyp...
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Online Access: | https://dx.doi.org/10.5281/zenodo.4901750 https://zenodo.org/record/4901750 |
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institution |
Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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unknown |
topic |
Biodiversity Taxonomy Animalia Annelida Polychaeta Orbiniidae Leitoscoloplos Leitoscoloplos plataensis |
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Biodiversity Taxonomy Animalia Annelida Polychaeta Orbiniidae Leitoscoloplos Leitoscoloplos plataensis Blake, James A. Leitoscoloplos plataensis Blake, 2017, new species |
topic_facet |
Biodiversity Taxonomy Animalia Annelida Polychaeta Orbiniidae Leitoscoloplos Leitoscoloplos plataensis |
description |
Leitoscoloplos plataensis new species Figures 9 F, 10 Material examined. Uruguay, off the mouth of the Rio de la Plata, IBM Sta. N- 242, 63 m (2, USNM 1013639); Sta. N- 260, 144 m (1, USNM 1013638); Sta. N-1073, 115– 117 m (3, USNM 1013637); Sta. 1074, 35°29′S, 53°01′W, 112 m, holotype and 2 paratypes (USNM 1013633–4); Sta. N- 1075, 68 m (1, USNM 1013636). — Argentina, IBM Sta. N-1059, 35°25.9′S, 53°27.9′W, 72–80 m, 14 paratypes (USNM 1013635); Golfo San Matías, SAO-1, Sta. 51, 41°08.30′S, 65°06.30′W, intertidal in gravel, coll. IBM (1, USNM 1013640). Description. A small species, holotype complete, approximately 13–14 mm long (posterior end coiled) and 0.8 mm wide for about 100 setigers. Color in alcohol: brown. Thoracic region with first 4–5 setigers weakly inflated, not depressed, with 9–10 setigers, similar in width to anterior abdominal segments (Figs. 9 E, 10A). Prostomium short, conical, pointed, and narrow (Figs. 9 F, 10A); two nuchal slits sometimes apparent in dorsolateral locations (Fig. 9 F); without eyespots. Peristomium a single triangular-shaped achaetous ring, narrower, but longer than setiger 1; with prostomium forming triangular “head.” Thoracic parapodia all similar, inconspicuous, with elongated postsetal lobes, with notopodia short, triangular in shape (Fig. 10 B); neuropodia with low basal cushion from which digitiform postsetal lobe emerges; postsetal lamellae short, narrow at first, becoming longer and thicker in last thoracic setigers. Abdominal notopodia with thin, narrow, fingerlike postsetal lobes; abdominal neuropodial lobes elongate, thickened apically with distinct ventral cirrus; subpodial flange small but distinct, continuous with neuropodial lobe (Fig. 10 C–D). Branchiae from setiger 13–16, short, triangular at first (Fig. 10 A, C), then increasing in length posteriorly (Fig. 10 D); branchiae asymmetrical, with large protruding lateral lobe (Fig. 10 C–D). Thoracic setae crenulated capillaries in dense fascicles with two rows of 20–25 setae per fascicle, arising from broad cushion (Fig. 10 B); setae of first row shorter and thinner than those of second row. Abdominal notosetae including 8–9 capillaries and 0–2 furcate setae; furcate setae with unequal tynes connected by row of fine needles; both tynes with rounded tips, shaft with ribbed crenulations (Fig. 10 E). Abdominal neurosetae including 2–3 long, smooth or weakly crenulated capillaries and 1–2 short, protruding, curved, blunt-tipped aciculae (Fig. 10 C). Pygidium a smooth, enlarged ring, lacking cirri. Etymology. This species is named for its proximity to the Rio de la Plata. Remarks. Leitoscoloplos plataensis n. sp. is closely related to L. kerguelensis in having 9–10 thoracic setigers and branchiae from setigers 13–16. Leitoscoloplos plataensis n. sp. differs in having the abdominal branchiae with a large protruding lateral lobe, ventral cirri on the abdominal neuropodia, and a different shape to the prostomium and peristomium. Further, furcate setae are rarely found in both the thoracic and abdominal notopodia of L. plataensis n. sp. but are commonly in the notopodia of L. kerguelensis . Distribution. Known only from off Uruguay and Argentina, intertidal to 144 m in coarse sediments. : Published as part of Blake, James A., 2017, Polychaeta Orbiniidae from Antarctica, the Southern Ocean, the Abyssal Pacific Ocean, and off South America, pp. 1-145 in Zootaxa 4218 (1) on pages 26-28, DOI: 10.5281/zenodo.245827 |
format |
Text |
author |
Blake, James A. |
author_facet |
Blake, James A. |
author_sort |
Blake, James A. |
title |
Leitoscoloplos plataensis Blake, 2017, new species |
title_short |
Leitoscoloplos plataensis Blake, 2017, new species |
title_full |
Leitoscoloplos plataensis Blake, 2017, new species |
title_fullStr |
Leitoscoloplos plataensis Blake, 2017, new species |
title_full_unstemmed |
Leitoscoloplos plataensis Blake, 2017, new species |
title_sort |
leitoscoloplos plataensis blake, 2017, new species |
publisher |
Zenodo |
publishDate |
2017 |
url |
https://dx.doi.org/10.5281/zenodo.4901750 https://zenodo.org/record/4901750 |
geographic |
Southern Ocean Pacific Argentina Uruguay |
geographic_facet |
Southern Ocean Pacific Argentina Uruguay |
genre |
Antarc* Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctica Southern Ocean |
op_relation |
http://publication.plazi.org/id/731AFFA50615090DFFA6FFEBFFDCFFC0 http://zoobank.org/9345C596-8656-4B5C-AD8C-2FACF4E9240C https://zenodo.org/communities/biosyslit https://dx.doi.org/10.5281/zenodo.245827 http://publication.plazi.org/id/731AFFA50615090DFFA6FFEBFFDCFFC0 https://dx.doi.org/10.5281/zenodo.245836 https://dx.doi.org/10.5281/zenodo.245837 http://zoobank.org/9345C596-8656-4B5C-AD8C-2FACF4E9240C https://dx.doi.org/10.5281/zenodo.4901751 https://zenodo.org/communities/biosyslit |
op_rights |
Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess |
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CC0 |
op_doi |
https://doi.org/10.5281/zenodo.4901750 https://doi.org/10.5281/zenodo.245827 https://doi.org/10.5281/zenodo.245836 https://doi.org/10.5281/zenodo.245837 https://doi.org/10.5281/zenodo.4901751 |
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ftdatacite:10.5281/zenodo.4901750 2023-05-15T13:55:08+02:00 Leitoscoloplos plataensis Blake, 2017, new species Blake, James A. 2017 https://dx.doi.org/10.5281/zenodo.4901750 https://zenodo.org/record/4901750 unknown Zenodo http://publication.plazi.org/id/731AFFA50615090DFFA6FFEBFFDCFFC0 http://zoobank.org/9345C596-8656-4B5C-AD8C-2FACF4E9240C https://zenodo.org/communities/biosyslit https://dx.doi.org/10.5281/zenodo.245827 http://publication.plazi.org/id/731AFFA50615090DFFA6FFEBFFDCFFC0 https://dx.doi.org/10.5281/zenodo.245836 https://dx.doi.org/10.5281/zenodo.245837 http://zoobank.org/9345C596-8656-4B5C-AD8C-2FACF4E9240C https://dx.doi.org/10.5281/zenodo.4901751 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 Annelida Polychaeta Orbiniidae Leitoscoloplos Leitoscoloplos plataensis article-journal ScholarlyArticle Text Taxonomic treatment 2017 ftdatacite https://doi.org/10.5281/zenodo.4901750 https://doi.org/10.5281/zenodo.245827 https://doi.org/10.5281/zenodo.245836 https://doi.org/10.5281/zenodo.245837 https://doi.org/10.5281/zenodo.4901751 2022-03-10T11:49:44Z Leitoscoloplos plataensis new species Figures 9 F, 10 Material examined. Uruguay, off the mouth of the Rio de la Plata, IBM Sta. N- 242, 63 m (2, USNM 1013639); Sta. N- 260, 144 m (1, USNM 1013638); Sta. N-1073, 115– 117 m (3, USNM 1013637); Sta. 1074, 35°29′S, 53°01′W, 112 m, holotype and 2 paratypes (USNM 1013633–4); Sta. N- 1075, 68 m (1, USNM 1013636). — Argentina, IBM Sta. N-1059, 35°25.9′S, 53°27.9′W, 72–80 m, 14 paratypes (USNM 1013635); Golfo San Matías, SAO-1, Sta. 51, 41°08.30′S, 65°06.30′W, intertidal in gravel, coll. IBM (1, USNM 1013640). Description. A small species, holotype complete, approximately 13–14 mm long (posterior end coiled) and 0.8 mm wide for about 100 setigers. Color in alcohol: brown. Thoracic region with first 4–5 setigers weakly inflated, not depressed, with 9–10 setigers, similar in width to anterior abdominal segments (Figs. 9 E, 10A). Prostomium short, conical, pointed, and narrow (Figs. 9 F, 10A); two nuchal slits sometimes apparent in dorsolateral locations (Fig. 9 F); without eyespots. Peristomium a single triangular-shaped achaetous ring, narrower, but longer than setiger 1; with prostomium forming triangular “head.” Thoracic parapodia all similar, inconspicuous, with elongated postsetal lobes, with notopodia short, triangular in shape (Fig. 10 B); neuropodia with low basal cushion from which digitiform postsetal lobe emerges; postsetal lamellae short, narrow at first, becoming longer and thicker in last thoracic setigers. Abdominal notopodia with thin, narrow, fingerlike postsetal lobes; abdominal neuropodial lobes elongate, thickened apically with distinct ventral cirrus; subpodial flange small but distinct, continuous with neuropodial lobe (Fig. 10 C–D). Branchiae from setiger 13–16, short, triangular at first (Fig. 10 A, C), then increasing in length posteriorly (Fig. 10 D); branchiae asymmetrical, with large protruding lateral lobe (Fig. 10 C–D). Thoracic setae crenulated capillaries in dense fascicles with two rows of 20–25 setae per fascicle, arising from broad cushion (Fig. 10 B); setae of first row shorter and thinner than those of second row. Abdominal notosetae including 8–9 capillaries and 0–2 furcate setae; furcate setae with unequal tynes connected by row of fine needles; both tynes with rounded tips, shaft with ribbed crenulations (Fig. 10 E). Abdominal neurosetae including 2–3 long, smooth or weakly crenulated capillaries and 1–2 short, protruding, curved, blunt-tipped aciculae (Fig. 10 C). Pygidium a smooth, enlarged ring, lacking cirri. Etymology. This species is named for its proximity to the Rio de la Plata. Remarks. Leitoscoloplos plataensis n. sp. is closely related to L. kerguelensis in having 9–10 thoracic setigers and branchiae from setigers 13–16. Leitoscoloplos plataensis n. sp. differs in having the abdominal branchiae with a large protruding lateral lobe, ventral cirri on the abdominal neuropodia, and a different shape to the prostomium and peristomium. Further, furcate setae are rarely found in both the thoracic and abdominal notopodia of L. plataensis n. sp. but are commonly in the notopodia of L. kerguelensis . Distribution. Known only from off Uruguay and Argentina, intertidal to 144 m in coarse sediments. : Published as part of Blake, James A., 2017, Polychaeta Orbiniidae from Antarctica, the Southern Ocean, the Abyssal Pacific Ocean, and off South America, pp. 1-145 in Zootaxa 4218 (1) on pages 26-28, DOI: 10.5281/zenodo.245827 Text Antarc* Antarctica Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Southern Ocean Pacific Argentina Uruguay |