Lygistorrhinidae
Creators: name: Hippa, Heikki
name: Mattsson, Ingegerd
name: Vilkamaa, Pekka
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Lygistorrhinidae

description: Key to genera of Lygistorrhinidae
We include Lygistorrhina asiatica in the key separately because a new genus is needed for it. According to the phylogenetic analysis (Fig. 1) it is the sister group of all other living Lygistorrhinidae. Lygistorrhina (Lygistorrhina) and Lygistorrhina (Probolaeus) are separated even if their monophyly is not yet shown. The sexual dimorphism in the species of the Lygistorrhinidae is largely unknown and it is possible that some of the characters used below apply only to males.
1. Number of ocelli 3......................................................................................................... 2
­ Number of ocelli 2......................................................................................................... 6
2. Rs present, sclerotized............................................................. Palaeognoriste Meunier
­ Rs absent or discernible only as a non­sclerotized fold ............................................... 3
3. Proboscis short, at most two and a half times the height of head ................................ 4
­ Proboscis long, four or more times as long as the height of head ................................ 5
4. Subcosta ending in costa, R1 meeting costa at the middle of wing ............................... ...........................................................................” Lygistorrhina ” asiatica Senior­White
­ Sc ending free, R1 meeting costa well within the basal half of wing ............................ ..................................................................................................... Labellorrhina gen. n.
5. Middle tibia with two apical spurs ............. Lygistorrhina Skuse, subg. Lygistorrhina
­ Middle tibia with one apical spur.... Lygistorrhina Skuse, subg. Probolaeus Williston
6. Hind basitarsomere swollen, as broad as apical part of hind tibia ............................... 7
­ Hind basitarsomere thin, narrower than apical part of hind tibia (Figs 5 B, 6B, 7B) .... 9 7. C with a swelling at the apex of vein R1, proboscis very short, about one­tenth the height of head ...................................................................................... Seguyola Matile ­ C without a swelling at the apex of R1, proboscis long, as long as or longer than the height of head ............................................................................................................... 8 8. Number of antennal flagellomeres 12, R1 meeting the costal margin well in basal half of wing .................................................................... Loyugesa Grimaldi & Blagoderov ­ Number of antennal flagellomeres14, R1 meeting the costal margin at the middle of wing Matileola Papp
description: Published as part of Hippa, Heikki, Mattsson, Ingegerd & Vilkamaa, Pekka, 2005, New taxa of the Lygistorrhinidae (Diptera: Sciaroidea) and their implications for a phylogenetic analysis of the family, pp. 1-34 in Zootaxa 960 on page 11, DOI: 10.5281/zenodo.171227