Systematics of the Neotropical species of Styringomyia Loew (Diptera: Tipulomorpha: Limoniidae) Ribeiro, Guilherme Cunha Zootaxa 2003 253 1 35 87KTH [664,824,1244,1270] Insecta Limoniidae Styringomyia Animalia Diptera 9 10 Arthropoda genus    1. Stout spine­like hairs present ( Figs. 10­13)................................................................... 2  ­ Stout spine­like hairs absent ( Figs. 14­17).................................................................... 5   2. Gonostylus much longer than broad, bearing two long spine­like hairs; extension I greatly developed, basal in position ( Figs. 10, 11)........................................................ 3  ­ Gonostylus almost as long as broad, bearing at least three short spine­like hairs; exten­ sion I apical in position ( Figs. 12, 13)........................................................................... 4   3. Four extensions present; apex of extension I broad ( Fig. 10) ....... S. mysticaAlexander  ­ Only three extensions present; apex of extension I narrowed ( Fig. 11) .. S. youngi sp. n.   4. Extension II short, spine­like hair situated at its apex ( Fig. 12) .......... S. atlantica sp. n.  ­ Extension II long, spine­like hair situated at its base ( Fig. 13) ..... S. paulistaAlexander   5. Two apical extensions present....................................................................................... 6  ­ Only one bifid apical extension present (probably resulting from the fusion of exten­ sion III and IV); anterior margin of gonostylus almost straight; slender hairs in the lat­ eral face concentrated at a protuberance near base of apical extension ( Fig. 16)...................................................................................................  S. amazonica sp. n. ­ Three apical extensions present; extension III and IV closely jointed; gonostylus long and slender ( Fig. 17) ......................................................................... S. manauara sp. n.   6. Gonostylus more or less S­shaped; extension III relatively poorly developed; medial face with a long and relatively stout hair near base of extension IV ( Fig. 14) ............... ....................................................................................................... S. simplexAlexander  ­ Gonostylus constricted at base; distal part of posterior margin expanded; extension III well developed ( Fig. 15) ........................................................................... S. maya sp. n.