Labahitha ryukyuensis ( Ono, 2013 ), 2022

Labahitha ryukyuensis ( Ono, 2013) View in CoL comb. nov.

Tricalamus ryukyuensis Ono, 2013: 16 View in CoL , figs 1–11. Holotype male ( NSMT-Ar 9930 ) and paratype males and females ( NSMT-Ar 9931–9935 ) from Kamara , Okinawa-shi , Okinawa Prefecture ( Okinawajima Island), Japan, 22 May 2011, T. Naka leg., 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 Labahitha and is a close relative of L. oonopiformis , L. garciai and L. nicobarensis , thus we propose the new combination.

Diagnosis

Males are similar to those of L. oonopiformis , L. garciai and L. nicobarensis by 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. garciai and L. gibsonhilli by 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 type locality (Okinawajima Island, Japan) ( Ono 2013) ( Fig. 1 View Fig ).