Nematocarcinus rotundus Crosnier & Forest 1973
Nematocarcinus rotundus Crosnier & Forest, 1973 (Figures 5–7) (to synonymy before 1973 see Crosnier & Forest, 1973: 105) Nematocarcinus rotundus — Wenner, 1979: 380; Takeda & Okutani, 1983: 53; Squires, 1990: 105; Burukovsky, 2001 b: 1440; 2003: 144; 2004: 558; 2012: 173. Material examin...
Main Authors: | , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
Zenodo
2014
|
Subjects: | |
Online Access: | https://dx.doi.org/10.5281/zenodo.5476991 https://zenodo.org/record/5476991 |
id |
ftdatacite:10.5281/zenodo.5476991 |
---|---|
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 Arthropoda Malacostraca Decapoda Nematocarcinidae Nematocarcinus Nematocarcinus rotundus |
spellingShingle |
Biodiversity Taxonomy Animalia Arthropoda Malacostraca Decapoda Nematocarcinidae Nematocarcinus Nematocarcinus rotundus Cardoso, Irene A. Burukovsky, Rudolf N. Nematocarcinus rotundus Crosnier & Forest 1973 |
topic_facet |
Biodiversity Taxonomy Animalia Arthropoda Malacostraca Decapoda Nematocarcinidae Nematocarcinus Nematocarcinus rotundus |
description |
Nematocarcinus rotundus Crosnier & Forest, 1973 (Figures 5–7) (to synonymy before 1973 see Crosnier & Forest, 1973: 105) Nematocarcinus rotundus — Wenner, 1979: 380; Takeda & Okutani, 1983: 53; Squires, 1990: 105; Burukovsky, 2001 b: 1440; 2003: 144; 2004: 558; 2012: 173. Material examined. Oceanprof I: A–12, 22o 12´S / 39 o 47´W, 1640 m, 1 female (10.93), MNRJ 23449. Habitats. Hab 12, 22o 13 'S / 39 o 53 'W, 978 m, 1 female (20.9), MNRJ 21777; Hab 13, 21o 40 'S / 39 o 57 'W, 989 m, 2 females (25.3–28.3), MNRJ 21779; Hab 13, 21o 40 'S / 39 o 57 'W, 989 m, 6 males (17.9–23.2), 12 females (27.05–29.59), 20 ovigerous females (24.8 –30.0), MNRJ 21781; Hab 14, 21o 6 'S / 40 o 8 'W, 990 m, 1 female (29.0), 2 ovigerous females (25.0– 29.9), MNRJ 21780; Hab 14, 21o 6 'S / 40 o 8 'W, 990m, 2 males (20.1, 20.7), 13 females (23.0– 28.8), 6 ovigerous females (25.9–30.9), MNRJ 21782; Hab 14, 21o 6 'S / 40 o 8 'W, 990 m, 9 males (21.0– 23.6), 28 females (18.2–31.6), 12 ovigerous females (23.3–29.3), MNRJ 21752; Hab 62, 23o 9 'S / 40 o 50 'W, 1244 m, 1 male (21.3), 2 females (19.2 –24.0), MNRJ 21744. REVIZEE: D–0503, 19 o 39 ’S / 38 o 38 ’W, 740 m, 1 female (19.6), 2 ovigerous females (24.2–24.7), MNRJ 23450; D–0504, 19 o 42 ’S / 38 o 36 ’W, 278 m, 2 ovigerous females (23.1, 24.2), MNRJ 23451; D–0505 19 o 43 ’S / 38 o 38 ’W, 1089 m, 1 sex not identified (19.4), MNRJ 23452; D–0506, 19 o 42 ’S / 38 o 36 ’W, 1067 m, 1 male (21.7), 2 ovigerous female (23.3–23.6), MNRJ 23453; E–0499, 13 o 23´S / 38 o 37´W, 761 m, 2 males (16.6–17.5), 4 females (19.1–23.2), 1 ovigerous female (24.2), MNRJ 14710; E–0503, 14 o 37´S / 38 o 42´W, 740 m, 9 females (16.3–19.1), MNRJ 14711; E–0506, 14 o 36 ’S / 38 o 49 ’W, 1067 m, 14 males (19.0– 24.4), 34 females (18.9–24.7), MNRJ 14726; E–0507, 15 o08’S / 38 o 40 ’W, 1026 m, 11 males (18.7 –23.0), 21 females (20.2 –31.0), 3 ovigerous females (24.5–26.9), MNRJ 14723; E–0517, 13 o 22 ’S / 38 o 36 ’W, 750 m, 1 male (17.3), 5 females (17.7–21.3), MNRJ 14713; E–0519, 13 o 19 ’S / 38 o 19 ’W, 1730 m, 1 male (18.1), 2 females (19.0, 24.3), MNRJ 14718; E–0520, 13 o 21 ’S / 38 o 16 ’W, 2137 m, 1 female (24.8), MNRJ 14717; E–0522, 13 º 30´S / 38 º 38´W, 1144 m, 1 male (18.9), 23 females (22.5–26.8), MNRJ 14708; E–0523, 19 o 42´S / 38 o 32´W, 922 m, 4 females (25.4–26.4), 6 ovigerous females (24.4–26.8), MNRJ 14719; E–0524, 19 o 43 ’S / 38 o 39 ’W, 925 m, 1 female (29.5), 6 ovigerous females (24.2–29.7), MNRJ 14721; E–0527, 19 o 50 ’S / 39 o 10 ’W, 1402 m, 1 male (20.7), 2 females (23.2–24.1), MNRJ 14704; E–0528, 19 o 45 ’S / 39 o03’W, 1237 m, 3 males (20.8–22.8), MNRJ 14702; E–0535, 19 o 58 'S / 39 o 35 'W, 1002 m, 4 females (18.2–25.3), 10 ovigerous females (23.4–32.4), MNRJ 14714; E–0547, 21 o 46´S / 39 o 40´W, 1799 m, 1 female (24.2), MNRJ 14697. Description. Body moderately slender; integument moderately soft, fragile, but not membranous, surface smooth, shiny. Rostrum horizontal, usually reaching second antennular peduncle segment distal margin; rostrum 3–4.4 times shorter than carapace (Figs. 5 A, B; 6 A); distance from rostrum apex to the rostrum distal dorsal tooth is usually similar than that between the remaining rostrum dorsal teeth (Fig. 5 A, B); rostrum dorsal margin (including postrostral crest) with 10–16 (usually 12–15) teeth; rostrum ventral margin with one well-defined tooth lying in the region of the rostrum under the distal dorsal tooth or slightly ahead of it (Figs. 5 A, B; 6 A). Eyes normally developed its width larger than the diameter of the eye stalk. Posterodorsal margin of third abdominal somite poorly developed, rounded. Continuation of its sides when crossing forms an angle close to 120 ° (Figs. 5 C, 6 B). Fifth abdominal somite pleura widely rounded, without spine or with a poorly developed spine, its sides intersecting at an angle of almost 120 ° (Figs. 5 D, 6 C, 7 A) and their inner sides without tubercles or rolls. First pereopod merus unarmed, ischium with 2 spines. Second to fourth pereopods merus with one spine. Fifth pereopod merus unarmed. Distoventral organ at sixth abdominal somite formed by two single parallel rows of long plumose setae, relatively widely spaced, usually extending to anterior margin of spots (Figs. 6 D; 7 B, C); each spot located on a well-pronounced elevation with relatively sharp back and sloping front edges; spots widely oval, about 2 times longer than wide, distance between them similar to the spots width (Figs. 6 D; 7 B–D). Telson with 6–8 (usually 7–8) pairs of dorsolateral spines; with one accessory spine (Figs. 6 A, 7 E). Distribution. At the Western Atlantic Ocean four regions of N. rotundus occurrence can be distinguished (Burukovsky 2001 b; 2012) (Fig. 11). The first region is in the North Atlantic between Long Island and Chesapeake Bay (at depths from 783 to 1960 m, mostly from 1000 to1500 m). The second region is between the Northwestern Bahamas archipelago and the south of Florida (at depths from 686 to 1875 m, usually deeper than 1000 m). The third region is in the Northern Gulf of Mexico (at depths from 421 to 1629m). The fourth region was mentioned by Takeda & Okutani (1983) and Gueguen (1995) that also found N. rotundus in French Guiana (07°N/ 53 °W, at 500–1000 m depth). Herein a fifth region was reconised, the South Atlantic from off Bahia to Rio de Janeiro states, Brazil (at depths from 603 to 960 m). Remarks. Comparing Southwestern Atlantic material with Burukovsky (2001 b; 2012) data we observed that most of its features fits very well with that mentioned to N. rotundus , as follows: the rostrum length and the number of dorsal teeth; the third abdominal somite dorsal margin and the fifth abdominal somite pleura; at distoventral organ the spots are located on a well-pronounced elevation and the distance between them is similar to the spots width, and the presence of one pair of accessory setae on telson. Some features however present small differences from that observed by Burukovsky (2001 b; 2012) as the position of rostrum ventral tooth; spots length and beginning of setae rows at distoventral organ (Fig. 7 C, D). Three Nematocarcinus species present the fifth abdominal somite with widely rounded pleura (pleura sides intersecting at an angle of almost 120 °) and a spine poorly developed or absent: N. challengeri Burukovsky, 2006; N. kaiensis Burukovsky, 2000 and N. rotundus Crosnier & Forest, 1973 (Burukovsky 2000 b; 2001 b; 2006 b). Nematocarcinus rotundus inhabit in the Western Atlantic, N. kaiensis in the Indo-West Pacific (between 13 ° 39 'N – 09° 33 'S / 120 ° 36 '– 133 ° 59 'W, at depths from 200 to 1150 m) and N. challengeri is known for a single specimen with strongly damaged rostrum sampled at Pacific Ocean (37 ° 49 'N / 166 ° 47 'W, at 5477m, the deepest record of the genus). Nematocarcinus rotundus and N. kaiensis can be distinguished by the rostrum shape (Burukovsky 2000 b). In N. kaiensis it is like a sharp blade, raised obliquely upwards (Burukovsky 2000 b), while in N. rotundus it is horizontal, lower than in N. kaiensis , with its ventral tooth pushed back a little further from the rostrum tip, and as a rule, it is directed straight ahead and not curved upwards, like in N. kaiensis (Burukovsky 2001 b). Nematocarcinus challengeri can be distinguished by the absence of spine on the fifth abdominal somite pleura while it is present, instead poorly developed (or absent in few specimens), in the other two species. The form of rostrum in N. chellengeri is not known. Nematocarcinus rotundus and N. kaiensis present a short rostrum, and considering the proximity between the three species probably N. challengeri presents also a short rostrum. : Published as part of Cardoso, Irene A. & Burukovsky, Rudolf N., 2014, Nematocarcinus Milne Edwards, 1881 (Crustacea, Decapoda) from Southwestern Atlantic, including the Southern Mid-Atlantic Ridge area, pp. 437-458 in Zootaxa 3887 (3) on pages 445-446, DOI: 10.11646/zootaxa.3887.4.3, http://zenodo.org/record/229361 : {"references": ["Crosnier, A. & Forest, J. (1973) Les crevettes profondes de l'Atlantique oriental tropical. Faune Tropicale, 19, 1 - 409.", "Wenner, E. L. (1979) Distribution and reproduction of nematocarcinid shrimp (Decapoda: Caridea) from the northwestern North Atlantic. Bulletin of Marine Sciences, 39 (3), 380 - 393.", "Takeda, M. & Okutani, T. (1983) Crustaceans and mollusks trawled off Surinam and French Guiana. Japan Fisheries Resources Research Center, 354 pp.", "Squires, H. J. (1990) Decapoda Crustacea of the Atlantic coast of Canada. Department of Fisheriesand Oceans, Ottawa, 530 pp.", "Burukovsky, R. N. (2001 b) Taxonomy of Nematocarcinus (Decapoda, Nematocarcinidae). Description of Nematocarcinus from waters of the American continent. Zoologichesky Zhurnal, 80 (12), 1429 - 1443. [in Russian with English abstract]", "Burukovsky, R. N. (2012) Deep Sea shrimps of the family Nematocarcinidae (history of study, systematic, distribution, and biology). Prospekt nauki, Sankt-Peterburg, 287 pp. [in Russian with English abstract]", "Gueguen, F. (1995) Sur les crustaces decapodes profonds de Guyane francaise (Atlantique central de lOuest). Comptes Rendus de l'Academie des Sciences, Sciences de La vie, 318, 1155 - 1165.", "Burukovsky, R. N. (2000 b) Taxonomy of shrimps from the genus Nematocarcinus 5. Redescription of N. nudirostris and description N. combensis, N. kaiensis and N. subtilis spp. n. Zoologicheskii Zhurnal, 79 (9), 1036 - 1044. [in Russian with English abstract]", "Burukovsky, R. N. (2006 b) Taxonomy of prawns from the genus Nematocarcinus. (Decapoda, Nematocarcinidae). Description of the type specimen, N. paucidentatus and some unidentified species of the family Nematocarcinidae from the collection of the British Museum (Samples from the \" Challenger \"). Zoologicheskii Zhurnal, 85 (7), 896 - 900. [in Russian with English abstract]"]} |
format |
Text |
author |
Cardoso, Irene A. Burukovsky, Rudolf N. |
author_facet |
Cardoso, Irene A. Burukovsky, Rudolf N. |
author_sort |
Cardoso, Irene A. |
title |
Nematocarcinus rotundus Crosnier & Forest 1973 |
title_short |
Nematocarcinus rotundus Crosnier & Forest 1973 |
title_full |
Nematocarcinus rotundus Crosnier & Forest 1973 |
title_fullStr |
Nematocarcinus rotundus Crosnier & Forest 1973 |
title_full_unstemmed |
Nematocarcinus rotundus Crosnier & Forest 1973 |
title_sort |
nematocarcinus rotundus crosnier & forest 1973 |
publisher |
Zenodo |
publishDate |
2014 |
url |
https://dx.doi.org/10.5281/zenodo.5476991 https://zenodo.org/record/5476991 |
geographic |
Canada Pacific Mid-Atlantic Ridge Long Island |
geographic_facet |
Canada Pacific Mid-Atlantic Ridge Long Island |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://zenodo.org/record/229361 http://publication.plazi.org/id/FFB7106CFFDFFFE7FF91787BFF94FFA6 http://zoobank.org/870D25CE-9C00-4D63-B4B4-077253C4DC6F https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.3887.4.3 http://zenodo.org/record/229361 http://publication.plazi.org/id/FFB7106CFFDFFFE7FF91787BFF94FFA6 https://dx.doi.org/10.5281/zenodo.229365 https://dx.doi.org/10.5281/zenodo.229366 https://dx.doi.org/10.5281/zenodo.229367 https://dx.doi.org/10.5281/zenodo.229371 http://zoobank.org/870D25CE-9C00-4D63-B4B4-077253C4DC6F https://dx.doi.org/10.5281/zenodo.5476992 https://zenodo.org/communities/biosyslit |
op_rights |
Open Access info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5281/zenodo.5476991 https://doi.org/10.11646/zootaxa.3887.4.3 https://doi.org/10.5281/zenodo.229365 https://doi.org/10.5281/zenodo.229366 https://doi.org/10.5281/zenodo.229367 https://doi.org/10.5281/zenodo.229371 https://do |
_version_ |
1766137565614702592 |
spelling |
ftdatacite:10.5281/zenodo.5476991 2023-05-15T17:37:33+02:00 Nematocarcinus rotundus Crosnier & Forest 1973 Cardoso, Irene A. Burukovsky, Rudolf N. 2014 https://dx.doi.org/10.5281/zenodo.5476991 https://zenodo.org/record/5476991 unknown Zenodo http://zenodo.org/record/229361 http://publication.plazi.org/id/FFB7106CFFDFFFE7FF91787BFF94FFA6 http://zoobank.org/870D25CE-9C00-4D63-B4B4-077253C4DC6F https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.3887.4.3 http://zenodo.org/record/229361 http://publication.plazi.org/id/FFB7106CFFDFFFE7FF91787BFF94FFA6 https://dx.doi.org/10.5281/zenodo.229365 https://dx.doi.org/10.5281/zenodo.229366 https://dx.doi.org/10.5281/zenodo.229367 https://dx.doi.org/10.5281/zenodo.229371 http://zoobank.org/870D25CE-9C00-4D63-B4B4-077253C4DC6F https://dx.doi.org/10.5281/zenodo.5476992 https://zenodo.org/communities/biosyslit Open Access info:eu-repo/semantics/openAccess Biodiversity Taxonomy Animalia Arthropoda Malacostraca Decapoda Nematocarcinidae Nematocarcinus Nematocarcinus rotundus Taxonomic treatment article-journal Text ScholarlyArticle 2014 ftdatacite https://doi.org/10.5281/zenodo.5476991 https://doi.org/10.11646/zootaxa.3887.4.3 https://doi.org/10.5281/zenodo.229365 https://doi.org/10.5281/zenodo.229366 https://doi.org/10.5281/zenodo.229367 https://doi.org/10.5281/zenodo.229371 https://do 2022-02-08T13:29:49Z Nematocarcinus rotundus Crosnier & Forest, 1973 (Figures 5–7) (to synonymy before 1973 see Crosnier & Forest, 1973: 105) Nematocarcinus rotundus — Wenner, 1979: 380; Takeda & Okutani, 1983: 53; Squires, 1990: 105; Burukovsky, 2001 b: 1440; 2003: 144; 2004: 558; 2012: 173. Material examined. Oceanprof I: A–12, 22o 12´S / 39 o 47´W, 1640 m, 1 female (10.93), MNRJ 23449. Habitats. Hab 12, 22o 13 'S / 39 o 53 'W, 978 m, 1 female (20.9), MNRJ 21777; Hab 13, 21o 40 'S / 39 o 57 'W, 989 m, 2 females (25.3–28.3), MNRJ 21779; Hab 13, 21o 40 'S / 39 o 57 'W, 989 m, 6 males (17.9–23.2), 12 females (27.05–29.59), 20 ovigerous females (24.8 –30.0), MNRJ 21781; Hab 14, 21o 6 'S / 40 o 8 'W, 990 m, 1 female (29.0), 2 ovigerous females (25.0– 29.9), MNRJ 21780; Hab 14, 21o 6 'S / 40 o 8 'W, 990m, 2 males (20.1, 20.7), 13 females (23.0– 28.8), 6 ovigerous females (25.9–30.9), MNRJ 21782; Hab 14, 21o 6 'S / 40 o 8 'W, 990 m, 9 males (21.0– 23.6), 28 females (18.2–31.6), 12 ovigerous females (23.3–29.3), MNRJ 21752; Hab 62, 23o 9 'S / 40 o 50 'W, 1244 m, 1 male (21.3), 2 females (19.2 –24.0), MNRJ 21744. REVIZEE: D–0503, 19 o 39 ’S / 38 o 38 ’W, 740 m, 1 female (19.6), 2 ovigerous females (24.2–24.7), MNRJ 23450; D–0504, 19 o 42 ’S / 38 o 36 ’W, 278 m, 2 ovigerous females (23.1, 24.2), MNRJ 23451; D–0505 19 o 43 ’S / 38 o 38 ’W, 1089 m, 1 sex not identified (19.4), MNRJ 23452; D–0506, 19 o 42 ’S / 38 o 36 ’W, 1067 m, 1 male (21.7), 2 ovigerous female (23.3–23.6), MNRJ 23453; E–0499, 13 o 23´S / 38 o 37´W, 761 m, 2 males (16.6–17.5), 4 females (19.1–23.2), 1 ovigerous female (24.2), MNRJ 14710; E–0503, 14 o 37´S / 38 o 42´W, 740 m, 9 females (16.3–19.1), MNRJ 14711; E–0506, 14 o 36 ’S / 38 o 49 ’W, 1067 m, 14 males (19.0– 24.4), 34 females (18.9–24.7), MNRJ 14726; E–0507, 15 o08’S / 38 o 40 ’W, 1026 m, 11 males (18.7 –23.0), 21 females (20.2 –31.0), 3 ovigerous females (24.5–26.9), MNRJ 14723; E–0517, 13 o 22 ’S / 38 o 36 ’W, 750 m, 1 male (17.3), 5 females (17.7–21.3), MNRJ 14713; E–0519, 13 o 19 ’S / 38 o 19 ’W, 1730 m, 1 male (18.1), 2 females (19.0, 24.3), MNRJ 14718; E–0520, 13 o 21 ’S / 38 o 16 ’W, 2137 m, 1 female (24.8), MNRJ 14717; E–0522, 13 º 30´S / 38 º 38´W, 1144 m, 1 male (18.9), 23 females (22.5–26.8), MNRJ 14708; E–0523, 19 o 42´S / 38 o 32´W, 922 m, 4 females (25.4–26.4), 6 ovigerous females (24.4–26.8), MNRJ 14719; E–0524, 19 o 43 ’S / 38 o 39 ’W, 925 m, 1 female (29.5), 6 ovigerous females (24.2–29.7), MNRJ 14721; E–0527, 19 o 50 ’S / 39 o 10 ’W, 1402 m, 1 male (20.7), 2 females (23.2–24.1), MNRJ 14704; E–0528, 19 o 45 ’S / 39 o03’W, 1237 m, 3 males (20.8–22.8), MNRJ 14702; E–0535, 19 o 58 'S / 39 o 35 'W, 1002 m, 4 females (18.2–25.3), 10 ovigerous females (23.4–32.4), MNRJ 14714; E–0547, 21 o 46´S / 39 o 40´W, 1799 m, 1 female (24.2), MNRJ 14697. Description. Body moderately slender; integument moderately soft, fragile, but not membranous, surface smooth, shiny. Rostrum horizontal, usually reaching second antennular peduncle segment distal margin; rostrum 3–4.4 times shorter than carapace (Figs. 5 A, B; 6 A); distance from rostrum apex to the rostrum distal dorsal tooth is usually similar than that between the remaining rostrum dorsal teeth (Fig. 5 A, B); rostrum dorsal margin (including postrostral crest) with 10–16 (usually 12–15) teeth; rostrum ventral margin with one well-defined tooth lying in the region of the rostrum under the distal dorsal tooth or slightly ahead of it (Figs. 5 A, B; 6 A). Eyes normally developed its width larger than the diameter of the eye stalk. Posterodorsal margin of third abdominal somite poorly developed, rounded. Continuation of its sides when crossing forms an angle close to 120 ° (Figs. 5 C, 6 B). Fifth abdominal somite pleura widely rounded, without spine or with a poorly developed spine, its sides intersecting at an angle of almost 120 ° (Figs. 5 D, 6 C, 7 A) and their inner sides without tubercles or rolls. First pereopod merus unarmed, ischium with 2 spines. Second to fourth pereopods merus with one spine. Fifth pereopod merus unarmed. Distoventral organ at sixth abdominal somite formed by two single parallel rows of long plumose setae, relatively widely spaced, usually extending to anterior margin of spots (Figs. 6 D; 7 B, C); each spot located on a well-pronounced elevation with relatively sharp back and sloping front edges; spots widely oval, about 2 times longer than wide, distance between them similar to the spots width (Figs. 6 D; 7 B–D). Telson with 6–8 (usually 7–8) pairs of dorsolateral spines; with one accessory spine (Figs. 6 A, 7 E). Distribution. At the Western Atlantic Ocean four regions of N. rotundus occurrence can be distinguished (Burukovsky 2001 b; 2012) (Fig. 11). The first region is in the North Atlantic between Long Island and Chesapeake Bay (at depths from 783 to 1960 m, mostly from 1000 to1500 m). The second region is between the Northwestern Bahamas archipelago and the south of Florida (at depths from 686 to 1875 m, usually deeper than 1000 m). The third region is in the Northern Gulf of Mexico (at depths from 421 to 1629m). The fourth region was mentioned by Takeda & Okutani (1983) and Gueguen (1995) that also found N. rotundus in French Guiana (07°N/ 53 °W, at 500–1000 m depth). Herein a fifth region was reconised, the South Atlantic from off Bahia to Rio de Janeiro states, Brazil (at depths from 603 to 960 m). Remarks. Comparing Southwestern Atlantic material with Burukovsky (2001 b; 2012) data we observed that most of its features fits very well with that mentioned to N. rotundus , as follows: the rostrum length and the number of dorsal teeth; the third abdominal somite dorsal margin and the fifth abdominal somite pleura; at distoventral organ the spots are located on a well-pronounced elevation and the distance between them is similar to the spots width, and the presence of one pair of accessory setae on telson. Some features however present small differences from that observed by Burukovsky (2001 b; 2012) as the position of rostrum ventral tooth; spots length and beginning of setae rows at distoventral organ (Fig. 7 C, D). Three Nematocarcinus species present the fifth abdominal somite with widely rounded pleura (pleura sides intersecting at an angle of almost 120 °) and a spine poorly developed or absent: N. challengeri Burukovsky, 2006; N. kaiensis Burukovsky, 2000 and N. rotundus Crosnier & Forest, 1973 (Burukovsky 2000 b; 2001 b; 2006 b). Nematocarcinus rotundus inhabit in the Western Atlantic, N. kaiensis in the Indo-West Pacific (between 13 ° 39 'N – 09° 33 'S / 120 ° 36 '– 133 ° 59 'W, at depths from 200 to 1150 m) and N. challengeri is known for a single specimen with strongly damaged rostrum sampled at Pacific Ocean (37 ° 49 'N / 166 ° 47 'W, at 5477m, the deepest record of the genus). Nematocarcinus rotundus and N. kaiensis can be distinguished by the rostrum shape (Burukovsky 2000 b). In N. kaiensis it is like a sharp blade, raised obliquely upwards (Burukovsky 2000 b), while in N. rotundus it is horizontal, lower than in N. kaiensis , with its ventral tooth pushed back a little further from the rostrum tip, and as a rule, it is directed straight ahead and not curved upwards, like in N. kaiensis (Burukovsky 2001 b). Nematocarcinus challengeri can be distinguished by the absence of spine on the fifth abdominal somite pleura while it is present, instead poorly developed (or absent in few specimens), in the other two species. The form of rostrum in N. chellengeri is not known. Nematocarcinus rotundus and N. kaiensis present a short rostrum, and considering the proximity between the three species probably N. challengeri presents also a short rostrum. : Published as part of Cardoso, Irene A. & Burukovsky, Rudolf N., 2014, Nematocarcinus Milne Edwards, 1881 (Crustacea, Decapoda) from Southwestern Atlantic, including the Southern Mid-Atlantic Ridge area, pp. 437-458 in Zootaxa 3887 (3) on pages 445-446, DOI: 10.11646/zootaxa.3887.4.3, http://zenodo.org/record/229361 : {"references": ["Crosnier, A. & Forest, J. (1973) Les crevettes profondes de l'Atlantique oriental tropical. Faune Tropicale, 19, 1 - 409.", "Wenner, E. L. (1979) Distribution and reproduction of nematocarcinid shrimp (Decapoda: Caridea) from the northwestern North Atlantic. Bulletin of Marine Sciences, 39 (3), 380 - 393.", "Takeda, M. & Okutani, T. (1983) Crustaceans and mollusks trawled off Surinam and French Guiana. Japan Fisheries Resources Research Center, 354 pp.", "Squires, H. J. (1990) Decapoda Crustacea of the Atlantic coast of Canada. Department of Fisheriesand Oceans, Ottawa, 530 pp.", "Burukovsky, R. N. (2001 b) Taxonomy of Nematocarcinus (Decapoda, Nematocarcinidae). Description of Nematocarcinus from waters of the American continent. Zoologichesky Zhurnal, 80 (12), 1429 - 1443. [in Russian with English abstract]", "Burukovsky, R. N. (2012) Deep Sea shrimps of the family Nematocarcinidae (history of study, systematic, distribution, and biology). Prospekt nauki, Sankt-Peterburg, 287 pp. [in Russian with English abstract]", "Gueguen, F. (1995) Sur les crustaces decapodes profonds de Guyane francaise (Atlantique central de lOuest). Comptes Rendus de l'Academie des Sciences, Sciences de La vie, 318, 1155 - 1165.", "Burukovsky, R. N. (2000 b) Taxonomy of shrimps from the genus Nematocarcinus 5. Redescription of N. nudirostris and description N. combensis, N. kaiensis and N. subtilis spp. n. Zoologicheskii Zhurnal, 79 (9), 1036 - 1044. [in Russian with English abstract]", "Burukovsky, R. N. (2006 b) Taxonomy of prawns from the genus Nematocarcinus. (Decapoda, Nematocarcinidae). Description of the type specimen, N. paucidentatus and some unidentified species of the family Nematocarcinidae from the collection of the British Museum (Samples from the \" Challenger \"). Zoologicheskii Zhurnal, 85 (7), 896 - 900. [in Russian with English abstract]"]} Text North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Canada Pacific Mid-Atlantic Ridge Long Island |