Scaptognathides undulatus Otto 2000 Diagnosis. Ds-2 and Ds-3 on AD. OC with 2 Glps. Female with 4 Pgs and 2 Sgs. Tr I–IV with 1-1-1-1 setae; Bf I–IV with 2-2-2-2 setae; Tf I–IV with 4-5-2-2 setae; Gn I–IV with 4-4-3-3 setae; Tb I–IV with 5-5-5-5 setae; Ta I–IV with 3-3-4-3 dorsal setae; Tf I–IV with ventral ridge. Lc II–IV with comb. Idiosoma length 182 in holotype female. Gnathosoma length 82 in holotype female. Ratio of gnathosoma to idiosoma 0.45. Remarks. The characteristics of this species are: reticulate dorsal plates, Sgs present in female, Tf I–IV with ventral ridge, and Ta III with 3 dorsal setae. This species is distinguished from congeners by having ventral ridge on Tf I–IV. Single female is known. Habitat. Subtidal zone: Coarse sands at 5–15 m depth. Distribution. South Pacific Ocean: 16°57.171’S, 149°12.036’E (Queensland Plateau) [Australia]. Reference. Otto (2000b). Depository. QMS.

Published as part of Abé, Hiroshi, 2021, Taxonomic review of the subfamily Lohmannellinae (Acari: Trombidiformes Halacaridae) with morphological comparisons among genera, pp. 201-255 in Zootaxa 4980 (2) on page 227, DOI: 10.11646/zootaxa.4980.2.1, http://zenodo.org/record/4888860