Allotrichia MCLACHLAN

Zhou, Lei, Yang, Lian-Fang & Morse, John C., 2016, New species of microcaddisflies from China (Trichoptera: Hydroptilidae), Zootaxa 4097 (2), pp. 203-219 : 206

Allotrichia MCLACHLAN

Allotrichia MCLACHLAN 1880, 505, 508; type species: Agraylea pallicornis EATON 1873 (monobasic).

The genus Allotrichia only contains 8 extant species and 3 fossil species, all of which have a West Palearctic distribution (MORSE 2015). Our new species of Allotrichia from northeastern China represents a remarkable extension of the range of Allotrichia to include now both the West Palearctic Region and the East Palearctic Region.

Generally they are very similar to those of Agraylea except 1) the inferior appendages are short and broad with concave posterior margins and 2) the subgenital plate bears a pair of characteristic asymmetrical dorsolateral projections. We agree that the presence or absence of fork 1 (fork of R2 and R3) in hind wings has not proven to be a consistent feature in either Agraylea or Allotrichia ( MARSHALL 1979); hind wing fork 1 is absent in all the new Chinese species in these two genera (e.g., Fig. 1 E).

Figures

FIGURE 1. Agraylea dactylina n. sp. male genitalia. A, left lateral; B, dorsal; C, ventral; D, aedeagus; E, fore- and hing wings; F, ventral process of segment VII, left lateral. bilob. d. pr. = bilobed dorsal projection of IX; dis. hal. = distal half of aedeagus; inf. app. = inferior appendage; p. lat. lob. = posterior lateral lobe of segment IX; prox. hal. = proximal half of aedeagus; sub. g. pl. = subgenital plate; t. X = tergum X; tit. = titillator; IX = segment IX.