Conchopus rectus
Creators: name: Masunaga, Kazuhiro
name: Saigusa, Toyohei
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Dolichopodidae
Conchopus
Conchopus rectus

description: Key to species of the rectus group of Conchopus Takagi (males)
1. Middle section of M1+2 not thickened (Figs. 18 a,b)........................................................... 2
- Middle section of M1+2 thickened (Figs. 18 c–f)............................................................. 4
2. Middle tarsomere 1without remarkably long anterior fine setae (Fig. 19 a)......................................... 3
- Middle tarsomere 1with remarkably long fine anterior setae (Japan, China).............................. rectus Takagi
3. Basal lobe of fore tarsomere 1 with 3–4 rather long marginal setulae (Figs. 1 a,b); ventral lobe as long as cercus, distinctly extended ventrally beyond tip of cercus (Fig. 3 a) (Hawai‘i, Maui, Lāna‘i, Moloka‘i)................ acrosticalis (Parent)
- Basal lobe of fore tarsomere 1 with 4–5 rather short marginal setulae (Figs. 4 a,b); ventral lobe shorter than 2/3 length of cercus (Figs. 6 a,b) (Hawai‘i, Maui, O‘ahu, Lisianski).................................................. ciliatus sp. nov.
4. Middle tibia and tarsomere 1 with remarkably long anterior setae (Fig. 19 b)...................................... 5
- Middle tibia and tarsomere 1 without remarkably long anterior setae............................................ 6
5. Ventral bristle of fore tarsomere 1 weak (Figs. 7 a,b) (Kaua‘i)................................... crassinervis sp. nov.
- Ventral bristle of fore tarsomere 1 strong (Japan, N. America, Peru)............................ borealis Takagi, 1965
6. Fore tarsomere 1 without strong ventral bristle (Japan)..................................... sikokianus Takagi, 1965
- Fore tarsomere 1 with strong ventral bristle................................................................ 7
7. Ventral bristle of fore tarsomere 1situated 1/3 of way from base (Figs. 13 a,b) (Kaua‘i, Nihoa).......... menehune sp. nov.
- Ventral bristle of fore tarsomere 1 situated halfway from base................................................. 8
8. Fore tarsomere 1 with raised keel ciliated with 2–4 setulae between basal lobe and ventral bristle (Figs. 15 a,b) (Hawai‘i, O‘ahu, Kaua‘i, Wake)................................................................... .. pacificus sp. nov.
- Fore tarsomere 1 without raised keel between basal lobe and ventral bristle (Figs. 10 a,b)............................ 9
9. Discal crossvein strongly oblique (Fig. 18 d) (Hawai‘i, Maui, Lāna‘i, Moloka‘i, O‘ahu, French Frigate Shoals)................................................................................................... minutus sp. nov.
- Discal crossvein slightly oblique........................................................................ 10
10. First flagellomere 1.5 times as long as wide, fore tarsomere 2 with two or more erect anterodorsal bristles (Japan, Taiwan).................................................................................... taivanensis Takagi, 1967
- First flagellomere 2.0 times as long as wide, fore tarsomere 2 with one erect anterodorsal bristle (Japan)...................................................................................................... pudicus Takagi, 1965
description: Published as part of Masunaga, Kazuhiro & Saigusa, Toyohei, 2010, A revision of the Hawaiian and Wake Island species of the genus Conchopus Takagi (Diptera, Dolichopodidae), pp. 1-35 in Zootaxa 2729 on page 4, DOI: 10.5281/zenodo.200114