Scaptognathus teuriensis Abé, 1990

Abé, Hiroshi, 2021, Taxonomic review of the subfamily Lohmannellinae (Acari: Trombidiformes Halacaridae) with morphological comparisons among genera, Zootaxa 4980 (2), pp. 201-255 : 235-236

Scaptognathus teuriensis Abé, 1990

Diagnosis. Glp-1 posterior to Ds-1. Ds-2 on membranous cuticle. PE with 1 dorsal seta. GA bipartite in female, uniform in male. Female with 6 Pgs and 4 Sgs. Male with 22–28 Pgs and 6 Sgs. Tr I–IV with 1-1-1-1 setae; Bf I–IV with 1-1-1-1 setae; Tf I–IV with 4-3-2-1 setae, 2-1-0-0 Bp setae; Gn I–IV with 4-4-3-3 setae, 2-1-0-0 Bp setae; Tb I–IV with 7-5-5-5 setae, 4-2-2-2 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 268–368 in adult (holotype male 340, paratype female 312), 224 in PN. Idiosoma width 148–220 in adult (holotype male 216, paratype female 180), 120 in PN. Gnathosoma length 192–212 in adult (holotype male 212), 120 in PN. Gnathosoma width 76–88 in adult (holotype male 88). Ratio of gnathosoma to idiosoma 0.58 in female, 0.62 in male, 0.61 in PN. Ratio of P-2 to P-1 3.27.

Remarks. The species has closest affinity to S. sabularius , however, differs from the latter by the Ds- 2 in the membranous area, bipartite GA in female, developed median claw, and the leg chaetotaxy. Female, male, and PN are known.

Habitat. Sublittoral zone: Coarse sands at 10 m depth.

Distribution. North Pacific Ocean: Teuri Is. (Hokkaido), Takeshima Is. (Shimane) (Dokdo Is. [ Korea]) [ Japan].

References. Abé (1990c), Abé & Green (1994), Lee & Chang (2017).

Depository. NHMIC.