New genus and two new species of the family Ethmolaimidae (Nematoda: Chromadorida), found in two different cold-seep environments
This study describes a new genus Dystomanema gen. nov. with two new species, D. cadizensis sp. nov. and D. brandtae sp. nov. within the family Ethmolaimidae, subfamily Neotonchinae, based on specimens from two low-activity cold-seep environments at distant geographical locations. The new genus was f...
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Online Access: | http://plymsea.ac.uk/id/eprint/5555/ http://biotaxa.org/Zootaxa/article/view/zootaxa.3692.1.4 https://doi.org/10.11646/zootaxa.3692.1.4 |
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ftplymouthml:oai:plymsea.ac.uk:5555 2023-05-15T13:57:46+02:00 New genus and two new species of the family Ethmolaimidae (Nematoda: Chromadorida), found in two different cold-seep environments Nara, BT Ellen, P Freija, H Ann, V Ingels, J 2013-07 http://plymsea.ac.uk/id/eprint/5555/ http://biotaxa.org/Zootaxa/article/view/zootaxa.3692.1.4 https://doi.org/10.11646/zootaxa.3692.1.4 unknown Nara, BT; Ellen, P; Freija, H; Ann, V; Ingels, J. 2013 New genus and two new species of the family Ethmolaimidae (Nematoda: Chromadorida), found in two different cold-seep environments. Zootaxa, 3692 (1). 7-27. https://doi.org/10.11646/zootaxa.3692.1.4 <https://doi.org/10.11646/zootaxa.3692.1.4> Biology Marine Sciences Oceanography Publication - Article PeerReviewed 2013 ftplymouthml https://doi.org/10.11646/zootaxa.3692.1.4 2022-09-13T05:48:20Z This study describes a new genus Dystomanema gen. nov. with two new species, D. cadizensis sp. nov. and D. brandtae sp. nov. within the family Ethmolaimidae, subfamily Neotonchinae, based on specimens from two low-activity cold-seep environments at distant geographical locations. The new genus was first identified in samples from the Darwin mud volcano (1100 m depth) in the Gulf of Cadiz and later on also found in samples from a low-activity seep in the Larsen B embayment (820m depth) off the eastern Antarctic Peninsula. Until now, the family Ethmolaimidae contained nine genera: Ethmolaimus and Paraethmolaimus in the subfamily Ethmolaiminae, and Comesa, Filitonchoides, Filitonchus, Gomphionchus, Gomphionema, Nannolaimus, and Neothonchus in the subfamily Neotonchinae. The most important family characteristics are: an annulated cuticle bearing transverse rows of dots, cephalic sensilla arrangement of 6+6+4, a spiral amphid, an oesophagus with muscular posterior bulb, paired gonads and males with cup-shaped precloacal supplements. The new genus resembles Comesa and Neotonchus, but is typified by a ventrally displaced oral opening with three very small teeth that are easily overlooked. D. cadizensis gen. nov. sp. nov. is characterized by the 1401-2123 mu m long body; cuticle transversally striated with fine punctation; head conical; low lips; amphid spiralled 3 turns, oral opening ventrally displaced, male with outstretched testes; spicules of equal size; gubernaculum plate-like and ten to twelve conspicuous cup-shaped precloacal supplements with external longitudinal articulated flange. D. brandtae gen. nov. sp. nov. can be distinguished by the 2438-3280 mu m long body; cuticle transversally striated with fine punctuation; head conical; low lips; amphid spiraled 3+ turns; oral opening ventrally displaced; male with anterior testes outstretched and posterior one smaller and reflexed; spicules of equal size; gubernaculum plate-like and twenty conspicuous cup-shaped precloacal supplements with external longitudinal ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Plymouth Marine Science Electronic Archive (PlyMSEA - Plymouth Marine Laboratory, PML) Antarctic Antarctic Peninsula Zootaxa 3692 1 7 |
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Open Polar |
collection |
Plymouth Marine Science Electronic Archive (PlyMSEA - Plymouth Marine Laboratory, PML) |
op_collection_id |
ftplymouthml |
language |
unknown |
topic |
Biology Marine Sciences Oceanography |
spellingShingle |
Biology Marine Sciences Oceanography Nara, BT Ellen, P Freija, H Ann, V Ingels, J New genus and two new species of the family Ethmolaimidae (Nematoda: Chromadorida), found in two different cold-seep environments |
topic_facet |
Biology Marine Sciences Oceanography |
description |
This study describes a new genus Dystomanema gen. nov. with two new species, D. cadizensis sp. nov. and D. brandtae sp. nov. within the family Ethmolaimidae, subfamily Neotonchinae, based on specimens from two low-activity cold-seep environments at distant geographical locations. The new genus was first identified in samples from the Darwin mud volcano (1100 m depth) in the Gulf of Cadiz and later on also found in samples from a low-activity seep in the Larsen B embayment (820m depth) off the eastern Antarctic Peninsula. Until now, the family Ethmolaimidae contained nine genera: Ethmolaimus and Paraethmolaimus in the subfamily Ethmolaiminae, and Comesa, Filitonchoides, Filitonchus, Gomphionchus, Gomphionema, Nannolaimus, and Neothonchus in the subfamily Neotonchinae. The most important family characteristics are: an annulated cuticle bearing transverse rows of dots, cephalic sensilla arrangement of 6+6+4, a spiral amphid, an oesophagus with muscular posterior bulb, paired gonads and males with cup-shaped precloacal supplements. The new genus resembles Comesa and Neotonchus, but is typified by a ventrally displaced oral opening with three very small teeth that are easily overlooked. D. cadizensis gen. nov. sp. nov. is characterized by the 1401-2123 mu m long body; cuticle transversally striated with fine punctation; head conical; low lips; amphid spiralled 3 turns, oral opening ventrally displaced, male with outstretched testes; spicules of equal size; gubernaculum plate-like and ten to twelve conspicuous cup-shaped precloacal supplements with external longitudinal articulated flange. D. brandtae gen. nov. sp. nov. can be distinguished by the 2438-3280 mu m long body; cuticle transversally striated with fine punctuation; head conical; low lips; amphid spiraled 3+ turns; oral opening ventrally displaced; male with anterior testes outstretched and posterior one smaller and reflexed; spicules of equal size; gubernaculum plate-like and twenty conspicuous cup-shaped precloacal supplements with external longitudinal ... |
format |
Article in Journal/Newspaper |
author |
Nara, BT Ellen, P Freija, H Ann, V Ingels, J |
author_facet |
Nara, BT Ellen, P Freija, H Ann, V Ingels, J |
author_sort |
Nara, BT |
title |
New genus and two new species of the family Ethmolaimidae (Nematoda: Chromadorida), found in two different cold-seep environments |
title_short |
New genus and two new species of the family Ethmolaimidae (Nematoda: Chromadorida), found in two different cold-seep environments |
title_full |
New genus and two new species of the family Ethmolaimidae (Nematoda: Chromadorida), found in two different cold-seep environments |
title_fullStr |
New genus and two new species of the family Ethmolaimidae (Nematoda: Chromadorida), found in two different cold-seep environments |
title_full_unstemmed |
New genus and two new species of the family Ethmolaimidae (Nematoda: Chromadorida), found in two different cold-seep environments |
title_sort |
new genus and two new species of the family ethmolaimidae (nematoda: chromadorida), found in two different cold-seep environments |
publishDate |
2013 |
url |
http://plymsea.ac.uk/id/eprint/5555/ http://biotaxa.org/Zootaxa/article/view/zootaxa.3692.1.4 https://doi.org/10.11646/zootaxa.3692.1.4 |
geographic |
Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_relation |
Nara, BT; Ellen, P; Freija, H; Ann, V; Ingels, J. 2013 New genus and two new species of the family Ethmolaimidae (Nematoda: Chromadorida), found in two different cold-seep environments. Zootaxa, 3692 (1). 7-27. https://doi.org/10.11646/zootaxa.3692.1.4 <https://doi.org/10.11646/zootaxa.3692.1.4> |
op_doi |
https://doi.org/10.11646/zootaxa.3692.1.4 |
container_title |
Zootaxa |
container_volume |
3692 |
container_issue |
1 |
container_start_page |
7 |
_version_ |
1766265649227628544 |