Raymunida, Macpherson & Machordom, 2000

Osawa, Masayuki, 2012, Raymunida Macpherson & Machordom, 2000 (Crustacea: Decapoda: Anomura: Munididae) from the KUMEJIMA 2009 Expedition in the Ryukyu Islands, Japan *, Zootaxa 3367, pp. 134-144 : 143

Key to the species of the genus Raymunida

1. Antennal article 2 unarmed on mesial margin.............................................................. 2

– Antennal article 2 usually with subdistal spine on mesial margin (in small specimens, spine reduced to low protuberance). 7

2. Carapace lacking long setae on dorsal surface. P1 with numerous long plumose setae...... R. bellior ( Miyake & Baba, 1967)

– Carapace usually with some long setae on dorsal surface. P1 with numerous long simple setae....................... 3

3. Frontal margin of carapace without spine mesial to anterolateral spine. P1 fixed finger with row of closely spaced spines on entire dorsolateral margin........................................... R. insulata Macpherson & Machordom, 2001

– Frontal margin of carapace with small spine mesial to anterolateral spine. P1 fixed finger with row of relatively sparse spines at least on proximal half of dorsolateral margin................................................................ 4

4. Pl chela robust, less than 5 times longer than broad; dactylus with distinct longitudinal crest on dorsal midline.................................................................................. R. formosanus Lin, Chan & Chu, 2004

– P1 chela slender, more than 6 times longer than broad; dactylus without longitudinal crest on dorsal midline............. 5

5. Abdominal somites 2 and 3 each with uninterrupted stria between 2 distinct transverse ridges on dorsal surface. Mxp3 merus with prominent distal spine on extensor margin.................................................. R. striata n. sp.

– Abdominal somites 2 and 3 without striae between 2 distinct transverse ridges on dorsal surface. Mxp3 merus unarmed or with small distal tooth on extensor margin...................................................................... 6

6. Mero-carpal articulation of P4 not reaching sinus between rostrum and supraocular spines of carapace................................................................................ R. confundens Macpherson & Machordom, 2001

– Mero-carpal articulation of P4 overreaching sinus between rostrum and supraocular spines of carapace.................................................................................. R. dextralis Macpherson & Machordom, 2001

7. Mxp3 merus unarmed on extensor margin............................. R. erythrina Macpherson & Machordom, 2001

– Mxp3 merus with distal spine on extensor margin........................................................... 8

8. Merocarpal articulation of P4 overreaching frontal margin of carapace.................... R. limbata Macpherson, 2006

– Merocarpal articulation of P4 not reaching frontal margin of carapace........................................... 9

9. Mero-carpal articulation of P4 only reaching level of first branchial spine of carapace (lateral end of anterior cervical groove). Abdominal somite 2 with 2 short median striae between 2 distinct transverse ridges on dorsal surface. P1 fingers without longitudinal crest on dorsal midline................................... R. cagnetei Macpherson & Machordom, 2000

– Mero-carpal articulation of P4 overreaching level of first branchial spine of carapace. Abdominal somite 2 with row of interrupted short or long striae or continuous stria between 2 distinct transverse ridges on dorsal surface. P1 fingers each with rounded longitudinal crest on dorsal midline............................................................... 10

10. Abdominal somite 4 without striae between 2 distinct transverse ridges on dorsal surface...... R. vittata Macpherson, 2009

– Abdominal somite 4 with faint or distinct striae between 2 distinct transverse ridges on dorsal surface................ 11

11. Thoracic sternites 5 and 6 with faint, short oblique ridges on lateral part. Abdominal somites 2 and 3 with faint, very short striae between 2 distinct transverse ridges on dorsal surface................. R. elegantissima (De Man, 1902) [holotype]

– Thoracic sternites 5 and 6 with distinct, comparatively long, oblique ridges on lateral part. Abdominal somites 2 and 3 with distinct, usually continuous long stria between 2 distinct transverse ridges on dorsal surface......... R. lineata Osawa, 2005