Diagnosis. Two corneae present. Ds-2 on membranous cuticle. Ds-3 on membranous cuticle. Two dorsal setae on PE. Female with 32–41 Pgs and 8 Sgs. Male with 55 Pgs and 8 Sgs. Tr I–IV with 1-1-1-1 setae; Bf I–IV with 3- 3-2-2 setae; Tf I–IV with 8-8-6-5 setae; Gn I–IV with 6-7-5-4 setae, 2-1-0-0 Bp setae; Tb I–IV with 11-10-7-7 setae, 5-5-3-3 Bp setae; Ta I–IV with 3-3-4-4 dorsal setae, 1-(1,2)-2-1 Bp setae. Lc I smooth, without accessory process. Idiosoma length 297–395 in female, 273 in male, 260 in DN, 257 in PN, 177 in LV. Idiosoma width 223 (idiosoma length 297) in female, 205 (idiosoma length 273) in male. Gnathosoma length 182 (idiosoma length 297) in female, 172 (idiosoma length 273) in male. Gnathosoma width 82 (idiosoma length 273) in male. Ratio of gnathosoma to idiosoma 0.61–0.63. Ratio of P-2 to P-1 2.88.
Remarks. This species resembles L. steueri, however, differs from the latter in that smooth Lc, Tb I with 6 Bp setae, GA with 5 or 6 outlying Pgs, and PD with V-shaped elevated ridge. Female, male, DN, PN, and LV are known.
Habitat. Littoral zone: Crevices in Lithophyllum (Rhodophyta).
Distribution. North Atlantic Ocean: Roscoff [France].
References. Bartsch (1977b, 1979e).
Depository. MNHNP.