Scaptognathus peregrinus Bartsch, 1993

Abé, Hiroshi, 2021, Taxonomic review of the subfamily Lohmannellinae (Acari: Trombidiformes Halacaridae) with morphological comparisons among genera, Zootaxa 4980 (2), pp. 201-255 : 234

Scaptognathus peregrinus Bartsch, 1993

Diagnosis. Glp-1 anterior to Ds-1. Ds-2 on membranous cuticle. PE with 1 dorsal seta. GA fully sclerotized in male. Male with ca.32 Pgs and 8 Sgs. Tr I–IV with 1-1-1-1 setae; Bf I–IV with 1-1-1-1 setae; Tf I–IV with 4-4-3-3 setae, 1-1-0-0 Bp setae; Gn I–IV with 4-4-3-3 setae, without Bp setae; Tb I–IV with (8,9)-5-6-6 setae, (5,6)-2-3-3 Bp setae; Ta I–IV with 3-3-4(?)-3 dorsal setae, 1-1-0-0 Bp setae. Lc I with unidentate long accessory process. Idiosoma length 297 in male (holotype). Gnathosoma length 140 in male (holotype). Gnathosoma width 107 in male (holotype). Ratio of gnathosoma to idiosoma 0.47.

Remarks. The species differs from congeners in having a wide lamellar rostrum and a gnatho-idiosomal articulation on the dorsal flank of the gnathosoma . A single male is known.

Habitat. Littoral zone: Sediment at 1.5 m depth.

Distribution. Indian Ocean: Rottnest Is. [ Australia].

References. Abé & Green (1994), Bartsch (1993a).

Depository. WAMP.