Argyrochlamys decolor ( Parent, 1930 )

Grichanov, I. Ya. & Gilasian, E., 2023, Three new species of the genus Argyrochlamys Lamb, 1922 (Diptera: Dolichopodidae) from mangroves of Iran and Oman, Russian Entomological Journal 32 (2), pp. 210-220 : 217

Argyrochlamys decolor ( Parent, 1930) , stat.n.

Camptoneura decolor Parent, 1930: 111 .

Argyrochlamys decolor : Dyte, 1975: 231.

DISTRIBUTION. Type locality: Mauritius, Tamarin Falls . The species is known only from type locality .

REMARKS. Camptoneura decolor was transferred to Argyrochlamys by Dyte [1975], who placed the species in synonymy to A. impudicus . However, comparing descriptions of the two species, we have found that they are certainly different. Thus, A. decolor was described with body size 3 mm; abdominal tergite 1 mostly yellow and tergite 2 entirely yellow, other segments with posterior margins of tergites yellow; thorax with yellow metapleuron and scutellum; mid coxa mostly black, yellow at apex. In contrast, A. impudicus was described with body size 4.8 mm; abdomen blackish green, with only posterior margins of tergites yellow; thorax entirely dark; mid coxa yellow, brownish at base. Therefore, we reinstate A. decolor as a true species, although some of the listed characters may vary. It is interesting that both species inhabit the island of Mauritius (see a record of A. impudicus in Grichanov et al. [2011]). The wing venation in A. decolor is closer to A. impudicus , than to new Iranian species described in this paper. Both A. decolor and A. impudicus have short vein R 2+3 and have no stublike vein M 2 (see also diagnostic Table in the Discussion section).