Lohmannella njoerdri Bartsch, 2020

Abé, Hiroshi, 2021, Taxonomic review of the subfamily Lohmannellinae (Acari: Trombidiformes Halacaridae) with morphological comparisons among genera, Zootaxa 4980 (2), pp. 201-255 : 217

Lohmannella njoerdri Bartsch, 2020

Diagnosis. Two corneae present. Ds-2 on membranous cuticle. Ds-3 on membranous cuticle. Two dorsal setae on PE. Female with nearly 14 Pgs and 8 Sgs. Male with 47 Pgs and 8 Sgs. Tr I–IV with 1-1-1-1 setae; Bf I–IV with 3-3-3-3 setae; Tf I–IV with (6,7)-6-4-4 setae; Gn I–IV with (7,8)-7-4-4 setae, (3,4)-1-0-1 Bp setae; Tb I–IV with (10,11)-9-7-6 setae, 6-3-1-3 Bp setae; Ta I–IV with 3-3-4-3 dorsal setae, 2-1-2-1 Bp setae. Lc I with minute unidentate accessory process. Idiosoma length 310 in male, ca. 314 in female, 179 in LV. Idiosoma width 230 in male. Gnathosoma length 182 in male. Ratio of gnathosoma to idiosoma 0.60 in male. Ratio of P-2 to P-1 4.00.

Remarks. The species is distinguished from congeners by having unusual slender Lc. This species has some resemblance to L. kervillei , L. multisetosa , L. norvegica , L. nudipes , L. reducta , L. rustica , L. steueri , and L. subfalcata . This species differs from L. kervillei and L. norvegica by having a compact gnathosoma . L. multisetosa has a P-2 with distinctly convex ventral margin, instead of straight in L. njoerdri . L. nudipes lacks Bp setae on Ta I–IV; L. reducta and L. steueri bear 4 and 5 ventral Bp setae on Tb I, respectively; and L. rustica has a single ventral Bp seta on Ta I, whereas L. njoerdri has 6 ventral Bp setae on Tb I and 2 ventral Bp setae on Ta I. L. subfalcata has a length AD:PD equalling 0.8:1.0 but in L. njoerdri 0.6:1.0. Slender claws are generally expected to be correlated with a life in a soft substrate, however, the mode of life of this species is unknown ( Bartsch 2020).

Habitat. Bathyal zone: Sediment at 285 m depth.

Distribution. North Atlantic Ocean: Sula Ridge (64°05.00’N, 08°02.00’E).

Reference. Bartsch (2020).

Depository. ZIZMH.