Peraeospinosus magnus ( Kudinova-Pasternak, 1990 ) Błażewicz-Paszkowycz, 2005
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publication ID |
https://doi.org/ 10.1080/00222930500450879 |
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persistent identifier |
https://treatment.plazi.org/id/03A787E0-FFAA-FFAF-FEEF-FA72FBFB45C5 |
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treatment provided by |
Felipe |
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scientific name |
Peraeospinosus magnus ( Kudinova-Pasternak, 1990 ) |
| status |
comb. nov. |
Peraeospinosus magnus ( Kudinova-Pasternak, 1990) View in CoL n. comb.
( Figure 6 View Figure 6 )
Synonymy. Typhlotanais magnus Kudinova-Pasternak 1990, p 94 –96.
Material examined
Holotype: ♀, MS-9, R / V Akademik Kutchatov; 31 ° 26.79S, 10 ° 029E, depth 4870– 4862 m. Diagnosis GoogleMaps
Female. Carapace 1.25 times longer than wide, truncated anteriorly. Pereonites 1, 2, and 4–6 wider than long. Pereonite 1 relatively long (two-thirds length of carapace). Pleon longer than carapace; pleotelson truncated posteriorly. Antennule article 3 three times as long as article 2. Pleopod endopod with two dorsal setae. Uropod rami subequal.
Supplementary description
Female without oostegites, length 6.1 mm ( Figure 6A View Figure 6 ).
Body. Body about seven to eight times longer than wide.
Pereonites and pleonites. Pereon 1 is two-thirds as long as carapace and subequal to pereonite 6; pleon longer than carapace; all pleonites similar in size; pleotelson truncated posteriorly.
Antennule ( Figure 6B View Figure 6 ). Article 1 a little longer than articles 2 and 3 combined, with three pinnate setae distally and three minute setae along article; article 2 is one-third as long as article 3, with one simple seta distally; article 3 with seven simple apical setae.
Antenna ( Figure 6C View Figure 6 ). Article 2 twice as long as article 3, both with short rod seta; article 4 twice as long as article 5, with five setae distally; article 5 with one simple seta distally; article 6 very short, with seven terminal setae.
Mouth parts and pereopods. Missing.
Pleopods ( Figure 6D View Figure 6 ). All pleopods similar in structure; endopod with two dorsal (inner) setae, exopod and endopod with a row of plumose setae on outer margin (length: width ratio of exopod 3.75; of endopod 2.9); no clear gap between the most proximal and other setae.
Uropod ( Figure 6E View Figure 6 ). Both rami uni-articled, subequal; endopod with one pinnate seta at the middle, tipped by four simple terminal setae and three pinnate setae; exopod with short simple middle seta on outer margin, tipped by strong and minute simple seta.
Distribution
Known only from the type locality ( Figure 25 View Figure 25 ).
Remarks
Peraeospinosus magnus is known only from the holotype, a specimen which lacks most appendages. The combination of characters observed in the antennule, antennae, pleopods, and uropods is enough to recognize P. magnus as a valid species. It is the only member of Peraeospinosus with two setae on the inner margin of the pleopods.
| R |
Departamento de Geologia, Universidad de Chile |
| V |
Royal British Columbia Museum - Herbarium |
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