Scaptognathus okinawensis Abé, 2012

Scaptognathus okinawensis Abé, 2012

Diagnosis. Glp-1 same level as Ds-1. Ds-2 on membranous cuticle. PE with 1 dorsal seta. GA tripartite in female. Female with 6 Pgs and 4 Sgs. Tr I–IV with 1-1-1-1 setae; Bf I–IV with 2-(1,2)-1-1 setae; Tf I–IV with (4,5)-(3–5)-(2,3)-(2,3) setae, 2-0-0-0 Bp setae; Gn I–IV with (4,5)-(4,5)-3-3 setae, 2-1-0-0 Bp setae; Tb I–IV with (8,9)-(5,6)-(6,7)-(6,7) setae, 6-3-(3,4)-(3,4) Bp setae; Ta I–IV with 3-3-3-3 dorsal setae, 1-1-0-0 Bp setae. Lc I with unidentate accessory process. Idiosoma length 238–260 ( holotype 260) in female, 185 in PN. Idiosoma width 133–148 ( holotype 148) in female, 95 in PN. Gnathosoma length 155–163 ( holotype 163) in female, 113 in PN. Gnathosoma width 75–78 ( holotype 75) in female, 53 in PN. Ratio of gnathosoma to idiosoma 0.63–0.67 in female. Ratio of P-2 to P-1 4.00.

Remarks.The characteristics of this species are:dorsal plates with scattered minute foveae, Ds-2 on membranous cuticle, tripartite GA in female, and leg chaetotaxy of thick Bp setae 1-1-0-0 in Ta I–IV, 6-3-(3,4)-(3,4) in Tb I–IV, 2-1-0-0 in Gn I–IV, and 2-0-0-0 in Tf I–IV. Female and PN are known.

Habitat. Littoral zone: Coarse coral sands at 10 m depth.

Distribution. North Pacific Ocean: Sesoko Is. ( Okinawa) [ Japan].

Reference. Abé (2012)

Depository. NSMT.