| Sphegina crucivena | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Diptera |
| Family: | Syrphidae |
| Genus: | Sphegina |
| Subgenus: | Asiosphegina |
| Species: | S. crucivena |
| Binomial name | |
| Sphegina crucivena Hippa, Steenis & Mutin, 2015 [1] | |
Sphegina crucivena is a species of hoverfly in the family Syrphidae found in Kambaiti Pass, Myanmar, a montane forest with swampy areas and streams located 2000 meters above sea level. [1]
The name comes from the Latin words 'crux', meaning 'cross', and 'vena', meaning 'vein', referring to the unusual cross vein between R1 and R2+3. [1]
In male specimens, the wings are 7.3 millimeters long (4.5 to 6.1 in females), hyaline, infuscated along the transversal veins with yellow stigma. The thorax is dull dark brownish to black, postpronotum and postalar callus dark yellow; pleura dark orange-brown; scutellum brownish, semicircular, and shiny. The pro- and mesolegs are yellow, tarsomeres 4 and 5 brownish; metaleg with coxa brownish, trochanter simple, brownish; metafemur yellow with a broad ventrally interrupted diffuse brown annulus medially; metatibia without apicoventral tooth, brown, the basal 1/4 and an annulus on the apical 1/2 yellow; metatarsus black. The surstyli and superior lobes are symmetrical, aedeagal lobe curved and very long, the postero-dorsal part of the aedeagus long and curved as well. [1]
Females are similar to males except for normal sexual dimorphism. Body length is 4.8 to 6.0 millimeters. The face is ventrally yellow and rather shiny, dorsally black; strongly concave, moderately projected antero-ventrally, with a well developed frontal prominence. The gena is shiny yellow; frons and vertex shiny dark brown; occiput shiny black; antenna brownish-yellow with the basal flagellomere elongated and the arista short and pilose. [1]
S. crucivena is very similar to S. forficata , though they differ by the dorsal margin of the surstylus (bowed in the middle in S. crucivena, evenly curved from base to apex in S. forficata), superior lobe (large and as long as sternite IX in S. crucivena, small and one-fourth the length of sternite IX in S. forficata), and apex of the ejaculatory hood (simple in S. crucivena, posterior part with tooth-like subapical lobe S. forficata). Male sternite IV is also slightly different; in S. crucivena the pile medially at posterior margin is stronger than in the other parts while in S. forficata the pile is similar throughout. [1]
Sphegina (Asiosphegina) atrimanus is a species of hoverfly in the family Syrphidae found in Vietnam.
Sphegina bracon is a species of hoverfly in the family Syrphidae found in Vietnam along with specimens of S. (A.) lucida, S. (A.) nigrotarsata, S. (A.) spenceri, S. (A.) verrucosa, and S. (A.) vietnamensis.
Sphegina (Asiosphegina) brevipilus is a species of hoverfly in the family Syrphidae found in China. It's similar to both S. (A.) plautus and S. (A.) simplex; it and S. (A.) plautus are the only known species with a sclerite between the bases of surstyli as well as posteriorly from the cerci.
Sphegina collicola is a species of hoverfly found in Malaysia.
Sphegina crinita is a species of hoverfly in the family Syrphidae found in Malaysia and Indonesia. It's easily identified by its superior lobes, the left side one being pushed over the medial line of the hypandrium to the right side so that the right side one seems bilobed. Otherwise, the genitalia are nearly identical to those in S. fimbriata.
Sphegina dentata is a species of hoverfly in the family Syrphidae found in Taiwan.
Sphegina uncinata is a species of hoverfly in the family Syrphidae found in Myanmar. It's easily identified by a straight dorsal line of frontal prominence that ends just before the ocellar triangle, a strongly projecting mouth edge, and a vibrissal angle more strongly protruding than the frontal prominence.
Sphegina (Asiosphegina) achaeta is a species of hoverfly in the family Syrphidae found in Myanmar. It's easily identified by the weak setae on abdominal tergite I. It's similar in appearance to S. adusta but easily differentiated upon closer examination. The male genitalia are similar to S. pollex and S. culex, though it can be distinguished by having an acute posterodorsal corner of the superior lobe and a broader surstylus; it differs further from S. pollex by lacking a sub-basal dorsal thumb-like lobe. The arrangement of bristles on tergite I is similar to S. japonica.
Sphegina (Asiosphegina) adusta is a species of hoverfly in the family Syrphidae found in Myanmar. It's easily identified by its large size, left side surstylus with a number of unusual lobes, and general dark-brown coloration. It's similar to S. atricolor and S. furva, but unlike these species it lacks a transverse crest at the base of the lobe located sinistrolaterally at the posterior margin of male sternite IV.
Sphegina (Asiosphegina) albolobata is a species of hoverfly in the genus Sphegina found in Vietnam. It's similar to S. (A.) licina, but differs by having the ventral lobe of both gonostyli narrower, apicodorsal part of the right superior lobe shorter, and the ventral part of the left superior lobe with more prominent anterior, medial, and posterior lobes.
Sphegina (Asiosphegina) atricolor is a species of hoverfly in the family Syrphidae found in Myanmar.
Sphegina (Asiosphegina) bidens is a species of hoverfly in the family Syrphidae found in Myanmar.
Sphegina (Asiosphegina) bilobata is a species of hoverfly in the family Syrphidae found in Myanmar. It's set apart from other species by its general pale yellowish color with three black longitudinal stripes on the scutum combined with the infuscated pattern at cross veins on the wing. The male sternite IV with its symmetrical pair of short spinose lobes posteriorly is quite distinct.
Sphegina (Asiosphegina) carinata is a species of hoverfly in the family Syrphidae found in Kambaiti Pass, Myanmar, a montane forest with swampy areas and streams located 2000 meters above sea level.
Sphegina crassispina is a species of hoverfly in the family Syrphidae found in Kambaiti Pass, Myanmar, a montane forest with swampy areas and streams located 2000 meters above sea level. A specimen was found in China that fits the description of S. crassispina save for the more extensively shiny frons and the slightly more protruding frontal prominence.
Sphegina culex is a species of hoverfly in the family Syrphidae found in Kambaiti Pass, Myanmar, a montane forest with swampy areas and streams located 2000 meters above sea level.
Sphegina cultrigera is a species of hoverfly in the family Syrphidae found in Kambaiti Pass, Myanmar, a montane forest with swampy areas and streams located 2000 meters above sea level.
Sphegina apicalis is a species of hoverfly in the family Syrphidae found in Taiwan.
Sphegina guptai is a species of hoverfly in the family Syrphidae found in India. It's similar to S. elegans in general appearance and characters of the male genitalia. It differs from known Oriental species of Sphegina by the shiny black abdomen with widened terga III and IV. Only S. quadrisetae has a somewhat similar appearance.
Sphegina kumaoniensis is a species of hoverfly in the family Syrphidae found in India, Thailand, and northeast Myanmar. It's characterized by a convex dorsal line of frontal prominence that ends clearly before the ocellar triangle as well as a mouthedge less strongly projecting, vibrissal angle less protruding or equal with the frontal prominence.
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