Scaptognathus okinawensis Abé, 2012

Abé, Hiroshi, 2021, Taxonomic review of the subfamily Lohmannellinae (Acari: Trombidiformes Halacaridae) with morphological comparisons among genera, Zootaxa 4980 (2), pp. 201-255 : 233

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.