A new species of Antigius (Lepidoptera: Lycaenidae: Theclini) from Taiwan

摘要

Antigius jinpingi, new species, is described from Taiwan, which Theclini fauna has been investigated extensively. The sister species of the new taxon is presumed to be A. butleri, a species distributed in the Asiatic continent and Japan. The larval host plant of A. jinpingi is unknown, but the most likely candidate is Quercus dentata, a deciduous oak with a rel-ictual distribution in Taiwan. Antigius Sibatani and Ito, 1942, is a small genus composed of four previously described species restricted toAsia. The male genitalia are characterized by a bifid uncus, a hook-like brachia, and a down-curved phallus; the female genitalia are distinguished by the lamella postvaginalis forming a broad sclerotized plate with a median groove (Shirózu & Yamamoto 1956). Koiwaya (2007) pointed out that male genitalia of Antigius species are asymmetrical. The larvae of all known species have a caudal protrusion (Teshirogi 1997; Koiwaya 2007) and are ridged dorsally, giving them an unusual Y-shaped appearance in dorsal view (Koiwaya 2007: pl. 188, figs. 37-39). A similar larval pattern is seen only in Saigusaozephyrus Koiwaya, 1993 (Koiwaya 2007: pl. 189, Fig. 47) within Theclini, but the caudal end of Saigusaozephyrus is not produced.