Thread subject: Diptera.info :: Fanniidae spec. ?

Posted by andrzej grzywacz on 12-01-2011 18:02
#11

Small correction to avoid wrong interpretation during identification of Fanniidae. Segment which Jorge has marked as a "1" is a second body segment but first thoracic. Larvae of Fanniidae have 12 segments (pseudocephalon + 3 thoracic + 7 abdominal + anal division-> last segment with posterior spiracles) not 11. Last one is always 12th, but on this photo we see only 11 because first segment (pseudocephalon) is retracted. Very often larvae, and always pupae of Fanniidae have first segment retracted into first thoracic segment. That can cause misinterpretation that they have only 11 segments. First segment is very good visible on the first photo of this post. However keys for the identification (Lyneborg, Rozkosny et al.) mark them from 1-11 (psedocephalon is omitted).

Projections on photo (top right corner) which I corrected as a "projections of dorsolateralas" should be "projections of laterodorsals".

Edited by andrzej grzywacz on 13-01-2011 14:42