Claustropyga elizabethae Hippa, Vilkamaa & Mohrig

Vilkamaa, Pekka & Hippa, Heikki, 2007, Review of the Nearctic Claustropyga Hippa, Vilkamaa & Mohrig (Diptera, Sciaridae) with the description of three new species, Zootaxa 1552, pp. 53-68 : 60

Claustropyga elizabethae Hippa, Vilkamaa & Mohrig

Fig. 1 C, D

Claustropyga elizabethae Hippa, Vilkamaa & Mohrig, 2003: 496 .

Discussion. Claustropyga elizabethae was described from the holotype male and two paratype males from Alaska and one paratype male from Ontario. C. elizabethae is very similar to the Holarctic C. acanthostyla and the species can be distinguished only by the characters of the hypopygium (compare Fig. 1 A, B with 1C, D): in C. elizabethae , all megasetae on the mesial side of the gonostylus are in the apical half of the gonostylus, whilst in C. acanthostyla one of the megasetae is well in the basal half. In addition, the apical part of the gonostylus is slightly more narrowed and curved in C. acanthostyla than in C. elizabethae . Whether C. acanthostyla and C. elizabethae really represent separate species is not quite certain and a larger material is needed to resolve the question. C. acanthostyla and C. elizabethae can be distinguished from all other Nearctic species except for C. triloba by the apically attenuated gonostylus. Otherwise they are distinctly different from C. triloba e.g. by having the two most apical megasetae of the gonostylus well basal from the apical tooth, not lying on the ventral side of it; by lacking a large basal body on the more dorsal of the two more basal megasetae; and by lacking the three-lobed tegmen.

Figures

FIGURE 1. Part of hypopygium (A, C) and gonostylus (B, D) in ventral view. A and B: Claustropyga acanthostyla (Tuomikoski) (from Alaska). C and D: C. elizabethae Hippa, Vilkamaa & Mohrig (holotype from Alaska). Scale 0.10