Gasteracantha irradiata (Walckenaer, 1841)

Macharoenboon, Kongkit, Siriwut, Warut & Jeratthitikul, Ekgachai, 2021, A review of the taxonomy of spiny-backed orb-weaving spiders of the subfamily Gasteracanthinae (Araneae, Araneidae) in Thailand, ZooKeys 1032, pp. 17-62 : 17

Gasteracantha irradiata (Walckenaer, 1841)

Plectana irradiata Walckenaer, 1841: 170. Type locality: Cochinchina.

Plectana irradiata Full list of synonyms and usage of the name available in World Spider Catalog (2020).

Remarks.

The abdomen of G. irradiata is oval and wider than long. Color of the abdomen is yellowish. The anterior edge of the abdomen is strongly curved backwards. Abdominal sigilla are very small. Abdominal spines are reddish. Anterior spines are shortest. Median spines are longest ( Walckenaer 1841; Merian 1911; Dahl 1914).

The specimens of G. irradiata collected from Thailand belong to Dahl’s collection ( Dahl 1914). However, the sampling locality was only noted as “Siam.” Based on its distribution records from previous study, it is possible that G. irradiata might be found in the southern and/or eastern parts of Thailand ( World Spider Catalog 2020). We failed to collect G. irradiata in this study.

Distribution and habitat.

Vietnam, Thailand, and Indonesia (Sulawesi, Sumatra, Lombok, and Java) ( Dahl 1914; World Spider Catalog 2020).