Gordonopsis, Guinot & Richer de Forges, 1995

Ng, Peter K. L. & Forges, Bertrand Richer de, 2020, A revision of the deep-sea porter crabs of the genus Gordonopsis Guinot & Richer de Forges, 1995 (Crustacea, Decapoda, Brachyura, Homolidae), with descriptions of five new species, Raffles Bulletin of Zoology 68, pp. 267-307 : 305

publication ID	https://doi.org/ 10.26107/RBZ-2020-0023
publication LSID	lsid:zoobank.org:pub:057B08EE-1006-43E8-AE20-0AF8F224BA2D
DOI	https://doi.org/10.5281/zenodo.4576678
persistent identifier	https://treatment.plazi.org/id/8F3E87B9-A805-BA0B-71AB-FBC1D9F14FB1
treatment provided by	Carolina
scientific name	Gordonopsis
status

Treatment

Key to species of Gordonopsis View in CoL

1. Carapace and pereiopods covered with long dense setae which obscures surfaces and margins ( Fig. 27 View Fig A–C); distal edge of dorsal margin of cheliped merus with 1 spine ( Fig. 28E, G, H View Fig ) ..... Gordonopsis velutina View in CoL , new species (Admiralty Islands)

– Carapace and pereiopods glabrous, covered with short setae that may obscure surface or longer sparser setae that does not obscure surface (e.g., Figs. 2 View Fig A–C, 14A–C, 17A–C); distal edge of dorsal margin of cheliped merus with 2 spines (e.g., Figs. 3F, G View Fig , 15G View Fig ) .............................................................................2

2. Latero-posterior margin of carapace with distinct tubercle or spine (e.g., Fig. 2A View Fig ); outer margin of P2–P4 coxae unarmed, smooth .....................................................................................3

– Latero-posterior margin of carapace with very low tubercle, barely visible (e.g., Fig. 17A View Fig ); outer margin of P2–P4 coxae with a spine or tubercle (may be reduced or absent on some of articles) (e.g., Figs. 18J, K View Fig , 22I, J View Fig ) ....................................5

3. Carapace relatively narrower with lateral margins straighter, less convex ( Fig. 9B View Fig ); carpus of cheliped with 1 spine on each of outer and inner margins, dorsal ridge smooth, unarmed ( Fig. 10F, G View Fig ) ......... Gordonopsis alaini View in CoL , new species ( Madagascar)

– Carapace longitudinally ovate, with posterior part more globose, lateral margins distinctly convex (e.g., Fig. 2A View Fig ); carpus of cheliped with 3 or more spines and spinules on each of outer and inner margins, dorsal ridge not armed with spines or spinules (e.g., Fig. 3F, G View Fig ) .......................................................4

4. Ambulatory legs long ( Figs. 2A View Fig , 6A View Fig ); distal part of P5 merus extending beyond gastric groove when folded anteriorly ( Figs. 4A View Fig , 8A View Fig ); dorsal ridge of carpus of cheliped with row of low granules ( Figs. 3F, G View Fig , 7G View Fig ); tip of G1 subtruncate ( Figs. 4H View Fig , 8K View Fig ) ... Gordonopsis profundarum ( Alcock & Anderson, 1899) (western Indian Ocean)

– Ambulatory legs short ( Fig. 12A, B View Fig ); distal part of P5 merus just reaching gastric groove when folded anteriorly ( Fig. 12D View Fig ); dorsal ridge of carpus of cheliped with row of low sharp tubercles ( Fig. 13F View Fig ); tip of G1 appears bifurcated ( Fig. 13K View Fig ) ... Gordonopsis robusta Ng, Padate & Saravanane, 2019 View in CoL (Andaman Sea)

5. Supraorbital margin proportionately wider, pseudorostral spines relatively short, directed slightly obliquely laterally at angle of 20–30° ( Figs. 14B View Fig , 15D View Fig , 17B View Fig )................................................6

– Supraorbital margin C-shaped, less wide, pseudorostral spines long, directed almost 45° obliquely laterally ( Figs. 21B View Fig , 24B View Fig ) .........................................................................................7

6. Carapace appears inflated when viewed laterally and frontally ( Fig. 15A, B View Fig ); P2–P4, particularly merus, proportionately shorter ( Fig. 16 View Fig E–G, K, L); outer surface of P4 merus with 1 tubercle on proximal part ( Fig. 16G, I View Fig )............... Gordonopsis pacifica Takeda & Suyama, 2019 View in CoL (southern Japan)

– Carapace appears inflated when viewed laterally and frontally ( Fig. 18A, B View Fig ); P2–P4, particularly merus, proportionately longer ( Fig. 19 View Fig D–F); outer surface of P4 merus unarmed, completely smooth ( Fig. 19F View Fig )...... Gordonopsis hera View in CoL , new species ( Papua New Guinea)

7. Outer margin of each P3 and P4 coxa with 2 long spines each ( Figs. 22I, J View Fig , 23B, H View Fig ); outer surface of P4 merus with 1 perpendicular spine on proximal part... Gordonopsis phorcys View in CoL , new species ( Solomon Islands)

– Outer margin of each P3 and P4 coxa with 1 spine each ( Fig. 26 View Fig B–D); outer surface of P4 merus unarmed, completely smooth ..... Gordonopsis ceto View in CoL , new species (South China Sea)