Thread subject: Diptera.info :: Possible diopsid

Posted by ChrisR on 30-05-2007 01:27
#1
Caught in a malaise trap in Western Malaysia in 1999/2000 - size about 6-8mm. I guessed diopsid but Theo suggested I ask here in case John can suggest another group :)
Edited by ChrisR on 30-05-2007 01:28

Posted by ChrisR on 30-05-2007 01:27
#2
lateral view...

Posted by Paul Beuk on 30-05-2007 06:55
#3
With the antennae placed close to the tips of the stalks you have got Diopsidae.

Posted by ChrisR on 30-05-2007 10:09
#4
Thanks :o) Are there any keys to oriental Diopsidae?

Posted by Paul Beuk on 30-05-2007 10:32
#5
Key to the world genera is included in:
Feijen, H.R., 1989. Diopsidae - Flies of the Nearctic Region 9(12): 1-122.
You may get some more info from others of Feijen's papers, that will probably are listed in the 1989 one.

Posted by ChrisR on 30-05-2007 10:46
#6
Great, thanks Paul :)

Posted by fleabag on 30-05-2007 14:07
#7
im guessing those are its eyes at the end of the storks? ..what an amazing creature:o

Posted by ChrisR on 30-05-2007 14:12
#8
Yes, the compound eye is the grey area at the end of each stalk :) They are rather fun ... I remember sifting through gallons of pickled insects and it made it all worthwhile when I found things like this or the Celyphid "beetle-fly" :D Sadly, you don't get many of them per gallon! ;)

Posted by proctoss on 30-05-2007 15:24
#9
Australasian/Oceanian Diptera Catalog

60. Family DIOPSIDAE

By Neal L. Evenhuis

Diopsids, commonly known as stalkeyed flies, are generally distributed throughout the Old World tropics, with 1 species found in North America. Adults are easily identified by their characteristic eye stalks, which are found in all taxa, although the stalk lengths vary considerably. The subfamily Centrioncinae, an Afrotropical group consisting of taxa without eye stalks, has recently been given family status (Feijen 1983). The family is largely African and Madagascan in origin, but considerable speciation has evidently taken place in the predominantly Oriental Teleopsis.

Little is known of their biology. Larvae of some African species have been recorded as shoot borers of rice (Descamps 1957, Morgan & Abu 1973, Scheibelreiter 1974, Feijen 1979).
Refs.: Shillito (1960, 1976, bibliogr.), Tan (1967, Cyrtodiopsis immat. biol.), Steyskal (1972a, world cat., key), Ferrar (1987, immat.), Peterson (1987, rev. Nearctic spp.).

Subfamily DIOPSINAE

Genus CYRTODIOPSIS Frey

CYRTODIOPSIS Frey, 1928a: 70. Type species: Diopsis dalmanni Wiedemann, 1830, orig. des.
dalmanni Wiedemann, 1830a: 560 (Diopsis). Indonesia (Java); Indonesia
(Maluku); widesp. SE Asia.

Genus EURYDIOPSIS Frey

EURYDIOPSIS Frey, 1928a: 70. Type species: Diopsis subnotata Westwood, 1847, orig des.
subnotata Westwood, 1847: 37 (Diopsis). Philippines; Indonesia (Irian
Jaya); Indonesia (Sulawesi), Laos, Malaysia (Pen), Philippines, Thailand, Vietnam.
argentifera Bigot, 1874c: 112 (Diopsis). Indonesia (Sulawesi).

Genus TELEOPSIS Rondani

TELEOPSIS Rondani, 1875: 442. Type species: Diopsis sykesii Westwood, 1837, orig des.
Undetermined sp.--Indonesia (Irian Jaya).

Subfamily SPHYRACEPHALINAE


Genus PSEUDODIOPSIS Hendel

PSEUDODIOPSIS Hendel, 1917: 33. Type species: Sphyracephala cothurnata Bigot, 1874 [= Diopsis detrahens Walker, 1860], orig des.
detrahens Walker, 1860a: 161 (Diopsis). Indonesia (Sulawesi); Indonesia (Irian Jaya), PNG (Bismarck Arch, Bougainville I, PNG), Solomon Is; China (Hainan I), Hong Kong, Laos, Malaysia, Ryukyus, Taiwan, Thailand.
cothurnata Bigot, 1874b: 25 [1874d: xxii] (Diopsis). Nomen nudum.
cothurnata Bigot, 1874c: 115 (Sphyracephala). Indonesia (Sulawesi).

http://hbs.bishopmuseum.org/aocat/diopsidae.html
http://hbs.bishopmuseum.org/aocat/aocathome.html