Catapaguroides

Komai, Tomoyuki, Yamada, Yusuke & Shirakawa, Naoki, 2010, A new hermit crab species of the genus Catapaguroides A. Milne-Edwards & Bouvier (Crustacea: Decapoda: Anomura: Paguridae) from the Ryukyu Islands, Japan, and additional record of C. foresti McLaughlin, Zootaxa 2690, pp. 32-42 : 40-41

Key to species of Catapaguroides

1. Ocular peduncles with corneas somewhat to appreciably reduced, conical in shape................................................... 2

- Ocular peduncles with corneas not appreciably reduced, not conical in shape........................................................... 4

2. Right cheliped entirely unarmed ........................................................ C. microps A. Milne-Edwards & Bouvier, 1892 [Eastern Atlantic: Monaco, Azores, Canary Islands; Western Pacific: Indonesia and Taiwan; 718–1900 m]

- Right cheliped armed with spines on chela and carpus ................................................................................................ 3

3. Left chela entirely unarmed ................................... C. foresti McLaughlin, 2002 (= C. kasei Osawa & Takeda, 2004 ) [ Guam and Japan; 3–20 m]

- Left chela armed with few spines on dorsomesial margin ............................. C. hooveri McLaughlin & Pittman, 2002 [Maui, Hawaiian Islands; 11–19 m]

4. Antennal peduncles overreaching distal corneal margins............................................................................................. 5

- Antennal peduncles not overreaching distal corneal margins .................................................................................... 15

5. Right cheliped with subrectangular or subovate chela (dorsal view), dorsomesial or mesial margin of dactylus nonlamellar ......................................................................................................................................................................... 6

- Right cheliped with subcircular chela (dorsal view), mesial margin of dactylus lamellar............................................. .......................................................................................................................... C. cristimanus de Saint Laurent, 1968 [Kai Islands, Indonesia, and Ryukyu Islands, Japan; 90 m]

6. Carpus and/or chela of right cheliped with at least 1 or 2 distinct spines..................................................................... 7

– Carpus and/or chela of right cheliped lacking distinct spines .................................................... C. iris ( Bouvier, 1922) [Azores and Morocco; 650–948 m]

7. Palm of right cheliped armed with several to numerous spines, at least on dorsomesial margin................................. 8

- Palm of right cheliped unarmed or with only 1 or 2 small tubercles or spinules on or near dorsomesial margin or distal angle ....................................................................................................................................................................... 13

8. Spines on palm of right cheliped almost exclusively restricted to dorsomesial margin.............................................. 9

- Spines on palm of right cheliped scattered or forming irregular rows on dorsal surface ........................................... 12

9. Carpus of right cheliped distinctly shorter than palm................................................ C. melini de Saint Laurent, 1968 [ Indonesia; 16–118 m]

- Carpus of right cheliped as long as or distinctly longer than palm............................................................................. 10

10. Carpus of left cheliped with 2 or more spines ............................................................................................................ 11

- Carpus of left cheliped unarmed ...................................................... C. megalops A. Milne-Edwards & Bouvier, 1892 [ Morocco and Azores; 200–636 m]

11. Dactylus of right chela with median ridge or crest, at least in proximal half ........... C. declivis de Saint Laurent, 1968 [Tanimbar Islands, Indonesia; 206–209 m]

- Dactylus of right chela without median ridge or crest ................................................ C. pectinipes ( Lewinsohn, 1969) [Dahlak Archipelago, Ethiopia; 108 m]

12. Palm of right cheliped with numerous small spines on dorsal surface ................. C. japonicus de Saint Laurent, 1968 [ Japan; 23–366 m]

- Palm of right cheliped with 3 irregular rows of fine spines or spinules on dorsal surface............................................. ......................................................................................................................... C. spinulimanus de Saint Laurent, 1968 [New Guinea and Kai Islands, Indonesia; 83–90 m]

13. Antennular peduncles overreaching distal corneal margins by nearly half length of penultimate segment; ocular peduncles moderately slender, cornea not wider than ocular peduncle ...................................................................... 14

- Antennular peduncles overreaching distal corneal margins by length of ultimate segment; ocular peduncles moderately stout, cornea distinctly broader than ocular peduncle ............................... C. mortenseni de Saint Laurent, 1968 [ Indonesia; 472–550 m]

14. Antennal acicle not reaching midlength of fifth segment of antennal peduncle; carpus of right cheliped unarmed at distomesial angle ....................................................................................................... C. inermis de Saint Laurent, 1968 [ Indonesia; 545–794 m]

- Antennal acicle elongate, reaching distal margin of fifth segment of antennal peduncle; carpus of right cheliped with prominent spine at distomesial angle .................................................................................................... C. longior n. sp. [Ryukyu Islands, Japan; 30 m]

15. Carpus of left cheliped with 1 or more spines ............................................................................................................ 16

- Carpus of left cheliped unarmed........................................................................................ C. olfaciens ( Alcock, 1905) [ Maldives]

16. Palm of left chela unarmed ......................................................................................................................................... 17

- Palm of left chela with at least 1 prominent spine...................................................................................................... 19

17. Right chela operculate, mesial margin of dactylus distinctly lamellar ........................... C. karubar McLaughlin, 1997 [Kai Islands, Indonesia; 205–212 m]

- Right chela non-operculate, mesial margin of dactylus not lamellar ......................................................................... 18

18. Cornea slightly dilated. Dactylus of right cheliped usually with prominent spine on mesial surface proximally. Carpus of right cheliped with spine on dorsodistal margin. Dactyli of ambulatory legs each with 4–8 corneous spines on ventral margin ................................................................................................... C. iejimaensis Osawa & Takeda, 2004 [Ryukyu Islands, Japan; 15–30 m]

- Cornea not dilated; dactylus of right cheliped always unarmed; carpus of right cheliped without spine on dorsodistal margin; dactyli of ambulatory legs each with 1–3 corneous spines on ventral margin ............ C. umbla Komai, 2009 [Ryukyu Islands, Japan; 8–14 m]

19. Dactylus of left chela as long as or longer than palm, fingers arched ventrally ............ C. setosus ( Edmondson, 1951) [O’ahu, Hawaiian Islands; 18 m]

- Dactylus of left chela appreciably shorter than palm, fingers not arched ventrally ............... C. fragilis ( Melin, 1939) [ Japan and Mururoa, Tuamotu Archipelago; 40 m]