Demicryptochironomus Lenz from China (Diptera: Chironomidae)

Abstract

The genus Demicryptochironomus Lenz 1941 from China is revised. The males of six new species are described: D. (Demicryptochironomus) antennarius sp. n., D. (D.) minus sp. n., D. (D.) pannus sp. n., D. (D.) yui sp. n., D. (Irmakia) concavus sp. n., D. (I.) constrictus sp. n. Demicryptochironomus (I.) neglectus Reiss 1988 is new to China. Demicryptochironomus (D.) vulneratus (Zetterstedt 1838) and D. (I.) spatulatus Wang & Zheng 1994 are redescribed. The larva of D. (D.) vulneratus is described from China for the first time, and an unplaced larva is described. Keys to males and known larvae of the genus are presented. An emended generic diagnosis is given and the systematics discussed.

Three new species of the Harnischia complex from the Sino-Indian Region,with a review of Demicryptochironomus Lenz (Diptera: Chironomidae)

“…Prior to this study, 19 species of Demicryptochironomus have been reported from the Sino-Indian region: 1 from Nepal, 2 from India, 4 from Japan, 7 from the Russian Far East, and 9 from China (Chaudhuri et al 2001;Makarchenko et al 2005;Reiss 1988;Sasa & Kikuchi 1995;Wang 2000;Wang & Zheng 1994;Yan et al 2005;Yan & Wang 2006). Yan et al (2005) suggested that 5 Japanese species originally placed in the genus Cryptotendipes by Sasa and his co-authors should be transferred to Demicryptochironomus. Yan and Wang (2006) We also re-examined holotypes of the genus Parachironomus from Japan.…”

“…Remarks. Yan et al (2005) suggested that the species should be placed in Demicryptochironomus based on the original description and figures. After re-examining the holotype, we confirm this formally.…”

“…Remarks. Yan et al (2005) suggested that the species should be placed in Demicryptochironomus based on the original description and figures. Re-examination of the holotype revealed that the base of the gonostylus of Cryptotendipes tamacutus Sasa is lacking an inner expansion.…”

“…The relationships between Saetheria, Olecryptotendipes, Demicryptochironomus and Irmakia need to be better elucidated, but this cannot be done without associated immatures. Yan et al (2005) revised the genus Demicryptochironomus from China and provided a key to the males of the world, comprizing 22 species: 11 Palaearctic, 3 Nearctic, 5 Oriental, 2 Afrotropical and 1 Australasian. Freeman (1961) recorded Chironomus (Cryptochironomus) curtivalva Kieffer from Australia.…”

“…Freeman (1961) recorded Chironomus (Cryptochironomus) curtivalva Kieffer from Australia. Saether (1977) and Yan et al (2005) incorrectly placed this species in Demicryptochironomus. According to Carew et al (2005) and Cranston and Martin (1989), it belongs in the genus Cladopelma.…”