Naushonia

Komai, Tomoyuki & Anker, Arthur, 2010, Two new species of the laomediid genus Naushonia Kingsley, 1897 (Crustacea: Decapoda: Gebiidea) from the Indo-West Pacific, Zootaxa 2504, pp. 31-46 : 45

Key to species of Naushonia

1. Postorbital spine simple ................................................................................................................................................ 2

– Postorbital spine bifid or trifid...................................................................................................................................... 8

2. Second to fifth abdominal somites with sharp median and submedian carinae ............................................................. ............................................................................................... N. carinata [Western Pacific: Vietnam and Philippines]

– Second to fifth abdominal somites without sharp median and submedian carinae (trace of median carinae sometimes present).......................................................................................................................................................................... 3

3. Palm of cheliped bearing 2 prominent spines proximomesially, cutting edge parallel to lateral margin; dactylus with row of small spines proximally on extensor margin [rostrum triangular in dorsal view; telson with 1 small spine on lateral margin] .............................................................................................. N. panamensis [Eastern Pacific: Panama]

– Palm of cheliped unarmed at proximomesial margin, cutting edge more or less oblique; dactylus without row of spines proximally on extensor margin .......................................................................................................................... 4

4. Rostrum triangular in dorsal view; submedian and lateral carinae on gastric region of carapace spinose; lateral margin of telson armed with more than 1 spine [palm with row of small spines on lateral margin].................................... ..................................................... N. lactoalbida [Indo-West Pacific: Mozambique and Ryukyu Archipelago, Japan]

– Rostrum rounded in dorsal view; submedian and lateral carinae on gastric region of carapace minutely granulate; lateral margin of telson unarmed or armed with 1 spine............................................................................................... 5

5. Telson unarmed on lateral margin; fixed finger arising at about mid-length of palm ................................................. 6

– Telson armed with 1 minute spine on lateral margin; fixed finger arising distal or proximal to mid-length of palm.... ..................................................................................................................................................................................... 7

6. Eyestalk with prominent distomesial spine; antennal scale with 11 or 12 lateral spines including terminal spine; cheliped dactylus markedly broadened proximal to mid-length .............................. N. japonica [Western Pacific: Japan]

– Eyestalk without prominent distomesial spine; antennal scale with 5 or 6 lateral spines including terminal spine; cheliped dactylus not broadened proximal to mid-length............................ N. perrieri [Indian Ocean: Gulf of Aden]

7. Antennal scale reaching to distal margin of fourth segment of antennal peduncle; cheliped palm 1.3 times longer than wide, fixed finger arising distal to mid-length of palm, lateral margin entire, cutting edge between fixed finger and subdistal large teeth faintly denticulate.......... N. latimana n. sp. [Indian Ocean: Mayotte, Comoro Archipelago]

– Antennal scale distinctly overreaching distal margin of fourth segment of antennal peduncle; cheliped palm twice as long as wide, fixed finger arising proximal to mid-length of palm, lateral margin serrate, cutting edge between fixed finger and subdistal large teeth serrate with slender, sharp spines.................................................................................. ....................................................... N. serratipalma n. sp. [Western Pacific: Society Archipelago, French Polynesia]

8. Telson unarmed on lateral margin; antennal scale with 10 or more lateral spines; uropodal exopod with 5 spines on lateral margin ......................................... N. crangonoides [Western Atlantic: Massachusetts to North Carolina, U.S.A.]

– Telson with spine(s) on lateral margin; antennal scale with less than 10 lateral spines; uropodal exopod with 2 spines on lateral margin ........................................................................................................................................................... 9

9. Telson with 1 spine on lateral margin; antennal scale with terminal spine strongly curved mesially ........................... ................................................................. N. portoricensis [Western Atlantic: Puerto Rico and Dominican Republic]

– Telson with 3 spines on lateral margin; antennal scale with terminal spine straight...................................................... ..................................................................... N. macginitiei [Eastern Pacific: southern California to Sonora, Mexico]