Tricalamus ryukyuensis Ono, 2013: 16 Labahitha spiders (Arachnida: Araneae: Filistatidae) from islands in the Indian and Pacific Oceans Magalhaes, Ivan L. F. Berry, James W. Koh, Joseph K. H. Gray, Michael R. European Journal of Taxonomy 2022 2022-03-16 805 1 1 51 98ZJ7 (Ono, 2013) Magalhaes & Berry & Koh & Gray 2022 Ono 2013 [511,940,523,550] Arachnida Filistatidae Labahitha Animalia Araneae 40 41 Arthropoda species ryukyuensis comb. nov.      Tricalamus ryukyuensis Ono, 2013: 16, figs 1–11.  Holotype male( NSMT-Ar 9930) and paratype malesand females( NSMT-Ar 9931–9935) from Kamara, Okinawa-shi, Okinawa Prefecture( Okinawajima Island), Japan,  22 May 2011, T. Nakaleg., deposited in the National Museum of Nature and Science, Tokyo, not examined.    Notes The structure of the male palp (drop-shaped bulb with a keel-shaped paraembolic lamina; Ono 2013: figs 1–3) and somatic morphology indicate this species belongs in  Labahithaand is a close relative of  L. oonopiformis,  L. garciaiand  L. nicobarensis, thus we propose the new combination.    Diagnosis Males are similar to those of  L. oonopiformis,  L. garciaiand  L. nicobarensisby the teardrop-shaped bulb with a keel-shaped paraembolic lamina. They differ by the more slender palpal tibia, the less globose base of the bulb ( Ono 2013: figs 1–3) (vs palpal tibia shorter and stouter, bulb base globose). Females are more similar to those of  L. oonopiformis,  L. garciaiand  L. gibsonhilliby the large membranous base of the receptacles and well-developed median receptacle; they differ in having the median receptacles smaller than the laterals ( Ono 2013: fig. 9) (vs median receptacles subequal in size or larger than the laterals).    Description See Ono (2013).    Natural history  Ono (2013)reports that specimens were collected in delicate webs with a central tubular retreat in inclined ground in the edge of a forest. One egg-sac had approximately 40 eggs.    Distribution Known only from the typelocality (Okinawajima Island, Japan) ( Ono 2013) ( Fig. 1). 4988633305 [779,1165,589,615] 2011-05-22 T. Naka Japan Kamara Okinawajima Island 40 41 NSMT-Ar 9930 1 1 1 Okinawa Prefecture holotype 4988633302 2011-05-22 T. Naka Japan Kamara Okinawajima Island 40 41 NSMT-Ar 9931-9935 2 1 1 Okinawa Prefecture paratype