The larva of Cyrnus cintranus McLachlan, 1884 (Trichoptera, Polycentropodidae, Polycentropodinae)

Abstract

The fifth instar larva of Cyrnus cintranus McLachlan, 1884 is described for the first time and the main taxonomic characters are figured. For taxonomic purposes, the larva of C. cintranus has been compared with that of other European species of the genus. The larvae of C. cintranus are very similar to those of C. trimaculatus (Curtis, 1834), but they are easily distinguishable by the colour pattern of the head. Additionally, some notes on distribution and ecological preferences are included.

Description of the larva ofPolycentropus schmidiNovak & Botosaneanu, 1965 (Trichoptera: Polycentropodidae) with some notes on its ecology

“…Edington & Hildrew 1995;Waringer & Graf 1997), is usually slightly higher than 0.5 (ratio in 5th instar larvae varies from 0.50 to 0.58, in 4th instar larvae from 0.67 to 0.72). Relatively long protarsi (about two thirds of tibia length) were also observed in P. corniger (Vieira-Lanero et al 2003). A higher prothoracic tarsus/tibia ratio in smaller larvae compared to older ones was also observed in larvae of P. flavomaculatus (Edington & Hildrew 1995).…”

“…Moreover, in larvae of all other species, except in the larvae of P. schmidi and P. irroratus, pigment bands are present on the dorsal surface of the head. P. flavomaculatus and P. corniger can also be separated by the curvation of the anal claw, which is right-angled in the latter (Vieira-Lanero et al 2003), but obtuse-angled in P. schmidi. On the other hand, P. excisus differs from P. schmidi also in the position of the dorso-lateral muscle attachment spot on the genae respective of the frontoclypeal suture.…”

“…The larvae of Polycentropus flavomaculatus (Pictet, 1834), P. kingi, McLachlan 1881, P. irroratus Curtis, 1835, P. excisus Klapalek, 1894, and P. corniger McLachlan, 1884 have been described (among other authors) in the works of Edington (1964), Bournaud et al (1964), Hickin (1964), Lepneva (1964) Sedlak (1985), Pitsch (1993), Edington and Hildrew (1995), Waringer and Graf (1997) and Vieira-Lanero et al (2003), whereas the immature stages of P. morettii Malicky, 1977, P. ierapetra Malicky, 1972, and P. schmidi Novak & Botosaneanu, 1965 are unknown. Recently many larvae resembling none of previously described Polycentropus larvae were found in Slovenia.…”