Lycaeopsis Claus, 1879

Zeidler, Wolfgang, 2004, A review of the hyperiidean amphipod superfamily Lycaeopsoidea Bowman & Gruner, 1973 (Crustacea: Amphipoda: Hyperiidea), Zootaxa 520, pp. 1-18 : 5-6

publication ID

https://doi.org/ 10.5281/zenodo.157410

publication LSID

lsid:zoobank.org:pub:41C7D868-7BD9-46F4-94F1-EBEA427E2836

DOI

https://doi.org/10.5281/zenodo.6269718

persistent identifier

https://treatment.plazi.org/id/BE758319-FF8B-BA00-FB4D-052AA7A9FED6

treatment provided by

Plazi

scientific name

Lycaeopsis Claus, 1879
status

 

Genus Lycaeopsis Claus, 1879 View in CoL

Lycaeopsis Claus, 1879: 41 View in CoL –42. Carus 1885: 426. Gerstaecker 1886: 486. Claus 1887: 66. Stebbing 1888: 1458. Spandl 1924: 27. Chevreux & Fage 1925: 417. Spandl 1927: 213. Pirlot 1939: 42. Hurley 1955: 179. Bowman & Gruner 1973: 41. Zeidler 1978: 20. Vinogradov et al. 1982: 358. Shih & Chen 1995: 140. Vinogradov 1999: 1192.

Phorcus Milne Edwards, 1830: 385 View in CoL , 391–392. Milne Edwards 1838: 304. Lucas 1840: 235. Milne Edwards 1840: 79. Dana 1852: 316. Dana 1853: 1000. Bate 1862: 339. Gerstaecker 1886: 485. Claus 1887: 66.

Phorcorrhaphis Stebbing, 1888: 1451 View in CoL –1452.

Type species

Lycaeopsis themistoides Claus, 1879 View in CoL , by monotypy. Type material could not be found at the ZMB or ZMH and is considered lost. However, Lycaeopsis View in CoL is a readily recognisable genus.

Type species of synonyms

The type species of Phorcus is P. reynaudii Milne Edwards, 1830 . Type material could not be found at the ANSP or MNHN and is considered lost. Although the description by Milne Edwards (1830) is brief, he mentions the extremely long, thin pereopod 5 that is so characteristic of males of Lycaeopsis . However, Phorcus is preoccupied by a genus of Mollusca ( Risso 1826). Thus, Phorcorrhaphis was introduced by Stebbing (1888) as a replacement name. At the time Stebbing did not appreciate that, because of the extreme sexual dimorphism, females were described as species of Lycaeopsis , a genus that has priority.

Sexual dimorphism

This genus probably exhibits more extreme sexual dimorphism than any other hyperiidean. Apart from the structure of the first antennae, the extremely elongated articles of pereopod 5 distinguish males. Other differences are as follows; the body of males is more slender with the pereon being only about half as deep as the pleon, whereas in females they are of similar depth; females lack a mandibular palp; pereopod 6 of males has broader articles, especially the basis and merus; males of at least one species have the endopod of uropod 3 characteristically incised, and the telson is bottled­shaped.

Remarks

Two species are currently recognised in this distinctive genus. While males are readily identifiable, females of the two are more difficult to distinguish.

Although Lycaeopsis is moderately common in tropical and temperate regions, very little is known about its biology.

ANSP

Academy of Natural Sciences of Philadelphia

MNHN

Museum National d'Histoire Naturelle

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Amphipoda

Family

Lycaeopsidae

Loc

Lycaeopsis Claus, 1879

Zeidler, Wolfgang 2004
2004
Loc

Phorcorrhaphis

Stebbing 1888: 1451
1888
Loc

Lycaeopsis

Vinogradov 1999: 1192
Shih 1995: 140
Vinogradov 1982: 358
Zeidler 1978: 20
Bowman 1973: 41
Hurley 1955: 179
Pirlot 1939: 42
Spandl 1927: 213
Chevreux 1925: 417
Spandl 1924: 27
Stebbing 1888: 1458
Claus 1887: 66
Gerstaecker 1886: 486
Carus 1885: 426
Claus 1879: 41
1879
Loc

Phorcus

Claus 1887: 66
Gerstaecker 1886: 485
Bate 1862: 339
Dana 1853: 1000
Dana 1852: 316
Lucas 1840: 235
Milne 1840: 79
Milne 1838: 304
Milne 1830: 385
1830
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