Theridiosoma alboannulatum Suzuki, Serita & Hiramatsu, 2020

Suzuki, Yuya, Hiramatsu, Takehisa & Tatsuta, Haruki, 2022, Two new species and a new genus of ray spiders (Araneae, Theridiosomatidae) from the Ryukyu Islands, southwest Japan, with notes on their natural history, ZooKeys 1109, pp. 67-101 : 67

publication ID	https://dx.doi.org/10.3897/zookeys.1109.83807
publication LSID	lsid:zoobank.org:pub:9C8BF86D-194A-46EF-9D49-072D09BF9E48
persistent identifier	https://treatment.plazi.org/id/ED480740-B043-5179-884C-A5007623E190
treatment provided by	ZooKeys by Pensoft (2022-07-02 07:37:11, last updated 2024-11-27 22:57:33)
scientific name	Theridiosoma alboannulatum Suzuki, Serita & Hiramatsu, 2020
status

Treatment

Theridiosoma alboannulatum Suzuki, Serita & Hiramatsu, 2020 View in CoL

Figs 12D View Figure 12 , 13D-E View Figure 13 , 15C View Figure 15

Theridiosoma alboannulatum Suzuki, Serita & Hiramatsu, 2020: 149, figs 2I-L, 4G-I, 6E-F, 12A-J, 13P (holotype male and paratypes from Iriomote Island, Japan; not examined).

Material examined.

Japan, Kurima Is. (Okinawa Prefecture): 2 ♂, Miyakojima City, Shimojikuruma (24°43'29.2"N, 125°15'09.2"E, alt. 41 m),, 17 Nov. 2021, Y. Suzuki leg. GoogleMaps Miyako Is. (Okinawa Prefecture): 3♂ 3 ♀, Miyakojima City, Hiraranishihara , grassland at roadside (24°49'53.5"N, 125°18'55.0"E, alt. 46 m), 24 Apr. 2022, Y. Suzuki leg. GoogleMaps Kuroshima Is. (Okinawa Prefecture): 2 ♂ 1♀, Yaeyama District, Taketomi Town, edge of coastal forest besides Hokei beach (24°14'26.2"N, 123°59'32.7"E, alt. 0 m), 2 Nov. 2021, Y. Suzuki leg. GoogleMaps Yonaguni Is. (Okinawa Prefecture): 1 ♀, Yaeyama District, Yonaguni Town, Yonaguni (24°27'58.8"N, 123°01'20.1"E, alt. 49 m), 12 Oct. 2021, Y. Suzuki leg. GoogleMaps ; 2 ♂ 2♀, Yaeyama District, Yonaguni Town, Sonai Village (24°28'10.5"N, 123°00'31.7"E, alt. 19 m), 12 Oct. 2021, Y. Suzuki leg. GoogleMaps ; 1 ♂ 1♀, Yaeyama District, Yonaguni Town , wetland beside secondary forest (24°27'16.3"N, 122°59'24.3"E, alt. 38m), 14 Oct. 2021, Y. Suzuki leg. GoogleMaps

Note.

See diagnosis section for comparison with T. nigrivirgatum sp. nov.

Habitat.

This species inhabits grasslands, bushes, and secondary forests. Spiders were collected from the basal parts of grasses.

Web morphology.

The spider weaves a concave web between the grasses (Fig. 13D, E View Figure 13 ).

Egg sac.

similar to that of T. nigrivirgatum sp. nov. (Fig. 15C View Figure 15 ).

Distribution.

Japan (Miyako, Kurima, Iriomote, Kuroshima, and Yonaguni Islands; Fig. 11 View Figure 11 ).

Figures

Figure 11. Distribution of theridiosomatid species in the Ryukyu Islands, Japan.

Figure 12. Habitats of theridiosomatid species in Ryukyu Islands A streamside in dim forest at Iriomote Island B forest floor of secondary forest at Kume Island C grassland at Kume Island D grassland at Yonaguni Island E crevices on limestone rocky wall at Iriomote Island.

Figure 13. Web of Theridiosoma and Zoma spiders at Ryukyu Islands, Japan A-C web of Theridiosoma nigrivirgatum sp. nov. D-E web of Theridiosoma alboannulatum F-H web of Zoma dibaiyin. Abbreviations: RA radial anastomosis SS sticky spirals TL tension line.

Figure 15. Egg sacs of theridiosomatid species A egg sac of Theridiosoma nigrivirgatum sp. nov. (cap opened) B egg sac of Theridiosoma dissimulatum C egg sac of Theridiosoma alboannulatum D-E egg sac of Sennin tanikawai sp. nov.