Lucasioides Kwon, 1993

Gongalsky, Konstantin B., Nefediev, Pavel S. & Turbanov, Ilya S., 2021, A new species of the genus Lucasioides Kwon, 1993 (Isopoda, Oniscidea, Agnaridae) from Siberia, Russia, Zootaxa 4903 (1), pp. 140-150 : 142

Genus Lucasioides Kwon, 1993

Type species: Lucasioides gigliotosi ( Arcangeli, 1927) .

Diagnosis (based on Kwon 1993; Yamaki et al. 2009; Li 2017). Flat body granulated dorsally, gland pores absent. Cephalon with frontal line separated by a groove, bearing well-developed median and lateral lobes. Epimeron of pereonite 1 bent lateral. Noduli laterales on pereonites 2–4 farther from lateral margin than ones on pereonites 1 and 5–7. Merus and carpus of male pereopods 1–4 each with a brush of long setae at sternal margins. Pleopodal exopods 1–5 with Protracheoniscus - type pseudotracheae.

Remarks. Lucasioides is close to Protracheoniscus Verhoeff, 1917 , Mongoloniscus Verhoeff, 1930 and Desertoniscus Verhoeff, 1930 . It can be distinguished from Protracheoniscus by the granulated dorsum and the triangular median lobe of the cephalon; in Protracheoniscus , the dorsal surface of the body is smooth, and the median lobe of the cephalon is less strongly developed. Lucasioides differs from both Mongoloniscus and Desertoniscus by the noduli laterales on pereonites 2–4 located farther from the lateral margin than the ones on pereonites 1 and 5–7, and the epimeron of pereonite 1 bent lateral; in Mongoloniscus , the noduli laterals are generally placed at the same distance from the lateral margin, and the regularly convex pereonite 1 is not bent laterad. Lucasioides can be distinguished from Desertoniscus by the antennae reaching pereonite 2.