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.