Phasia pusilla
publication ID |
https://doi.org/ 10.11646/zootaxa.276.1.1 |
publication LSID |
lsid:zoobank.org:pub:4177F6E7-B276-438E-8E49-EE5ECD84D351 |
persistent identifier |
https://treatment.plazi.org/id/03CF879C-8B3F-FF8E-FEAF-F978FAF2F9C4 |
treatment provided by |
Felipe |
scientific name |
Phasia pusilla |
status |
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Key to species of Phasia pusilla View in CoL species group
(The males of Phasia emdeni , Phasia faceta , Phasia girschneri , Phasia noskiewiczi and Phasia siberica are unknown. Unrevised species (Neotropical) are marked with an asterisk).
1. Hind femur strongly arched .......................................* P. curvipes ( Aldrich, 1934) ♂ ♀
Hind femur not arched .................................................................................................. 2
2. Hind tibia strongly arched, shorter than hind femur; presutural supraalar seta absent; sternite VI of female extremely long, longer than the total length of the previous sternites. ............................................................................ P. punctigera ( Townsend, 1891) View in CoL ♂ ♀
Hind tibia straight or slightly arched, as long as hind femur; presutural supraalar seta usually present; sternite VI of female shorter than the total length of other sternites... 3
3. Male .............................................................................................................................. 4
Female ........................................................................................................................ 12
4. Eyes separated by a distance equal to or greater than the width of ocellar triangle .....5
Eyes separated by a distance less than the width of ocellar triangle ............................ 7
5. Abdomen slender, tergite IV with 810 rows of hairs; body size 6.5 8.5 mm; Nearctic species ................................................................................ P. robusta ( Brooks, 1945) View in CoL ♂
Abdomen spherical, tergite IV with 46 rows of hairs; body size 3.0 5.5 mm; Palaearctic or Oriental species ................................................................................................... 6
6. Syncercus deeply notched posteriorly, almost semicircular; outer angles rounded; distiphallus with a posterior fanlike lobe, and regular saw teeth........................................ .......................................................................................... P. indica ( Mesnil, 1953) View in CoL ♂
Syncercus shallowly notched posteriorly; outer angle acute; distiphallus with marginal irregular saw teeth ....................................... ....... P. mesnili View in CoL (DraberMo ń ko, 1965) ♂
7. Dorsum of syntergite I+II and tergite III matte black, other tergites silky pruinose (strongly contrasting); eyes separated by a distance equal to the diameter of a single ocellus.................................................................. P. venturii View in CoL (DraberMo ń ko, 1965) ♂
Dorsum of tergites not as above; eyes separated by a distance wider than a single ocellus, but narrower than the ocellar triangle .................................................................... 8
8. Dorsum of abdomen with a purple shining area P. purpurascens ( Townsend, 1891) View in CoL ♂
Dorsum of abdomen without purple shining area ........................................................ 9
9. Surstylus balllike ...................................................... P. aldrichii ( Townsend, 1891) ♂
Surstylus flattened, or slender .................................................................................... 10
10. Syncercus with posterior notch over 1/2 of length ........... P. pusilla (Meigen, 1924) View in CoL ♂
Syncercus with posterior notch less than 2/5 of length .............................................. 11
11. Phallus without fine hairs dorsally .................................. P. truncata Herting, 1983 View in CoL ♂
Phallus with fine hairs dorsally; distiphallus with sclerotized saw teeth ........................ ........................................................................................ P. pandellei ( Dupuis, 1957) View in CoL ♂
As in P. pandellei View in CoL but distiphallus membranous ........... P. normalis (Curren, 1927) View in CoL ♂
12. Sternite VII deeply notched posteriorly ...................................................................... 13
Sternite VII not notched posteriorly ........................................................................... 16
13. Sternite VII broad posteriorly in profile, over 1/2 as wide as that of middle ............14
Sternite VII narrow posteriorly in profile, less than 1/3 as wide as that of middle .... 15
14. Sternite VII short and broad in profile ............................. P. truncata Herting, 1983 View in CoL ♀ Sternite VII slender in profile ........................ P. girschneri View in CoL (DraberMo ń ko, 1965) ♀
15. Sternite VII strongly flattened laterally; in ventral view, outer side of posterior half parallelsided ................................................................. P. pandellei ( Dupuis, 1957) View in CoL ♀
Sternite VII flattened dorsoventrally; in ventral view, narrow at middle, outer side of posterior half arched ........................................... P. emdeni View in CoL (DraberMo ń ko, 1970) ♀
16. Sternite VII bent downward posteriorly ..................................................................... 17
Sternite VII straight or bent upward posteriorly ........................................................ 18
17. Sternite VII with a median unsclerotized area ............................................................... ....................................................................... P. noskiewiczi View in CoL (DraberMo ń ko, 1965) ♀
Sternite VII without a unsclerotized area ............................ P. pusilla Meigen, 1824 View in CoL ♀
18. Sternite VII arrowlike posteriorly in ventral view; wrinkles ventrally.......................... ............................................................................. P. mesnili View in CoL (DraberMo ń ko, 1965) ♀
Sternite VII as in P. mesnili View in CoL but smooth ventrally.......... P. normalis (Curren, 1927) View in CoL ♀
Sternite VII not arrowlike posteriorly in ventral view .............................................. 19
19. Dorsum of syntergite I+II, and most part of tergite III matte shining black; sternite VII abruptly and sharply pointed ............................. P. venturii View in CoL (DraberMo ń ko, 1965) ♀
Dorsum of tergites not as above; sternite VII gradually narrowed ............................ 20
20.Apex of sternite VII beaklike in profile, basal width half of its length; body length 6.8 mm .......................................................................................... P. robusta ( Brooks, 1945) View in CoL ♀
Apex of sternite VII not beaklike, basal width less than 1/2 of its length; body length 3.5 mm ........................................................................................................................ 21
21. Frontal vitta 6.5 times as wide as frontoorbital plate anteriorly at level of antenna base ......................................................................................... P. faceta Sun View in CoL , new species ♀
Frontal vitta less than 4 times as wide as frontoorbital plate anteriorly at level of antenna base ................................................................................................................ 22
22. Sternite VII with distinct micro spines ventrally in posterior 3/5, tubular in ventral view ............................................................................................. P. indica ( Mesnil, 1953) View in CoL ♀
Sternite VII with indistinct spines ventrally, towerlike in ventral view .................... 23
23. Abdomen greyish white pruinose, hair spots indistinct; abdomen spherical, sternite VII short............................................................................ P. aldrichii ( Townsend, 1891) ♀
Abdomen greyish yellow pruinose; hair spots very distinct, sternite VII long .......... 24
24. Frontal vitta at base of antennae 2.1 times as wide as frontoorbital plate anteriorly; Palaearctic species ....................................................... P. siberica Sun View in CoL , new species ♀
Frontal vitta less than 1.5 times as wide as frontoorbital plate anteriorly; Nearctic species ........................................................................... P. purpurascens ( Townsend, 1891) View in CoL ♀
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