Simulium ceylonicum
Creators: name: Jitklang, Sanae
name: Kuvangkadilok, Chaliow
name: Baimai, Visut
name: Takaoka, Hiroyuki
name: Adler, Peter H.
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Simuliidae
Simulium
Simulium ceylonicum

description: Key to pupae of 10 cytoforms in the S. ceylonicum group in Thailand *
(Fig. 11)
1 Cocoon with distinct anterodorsal projection .......................................................................... inthanonense
- Cocoon without distinct anterodorsal projection, although slight bulge may be present............................2
2 Terminal hooks with smooth outer margins.................................................................................................3
- Terminal hooks wider than high, with crenulated or serrated outer margins...............................................4
3 Gill (Fig. 11 A) with stalk of dorsal triplet thinner than that of middle triplet ................................. asakoae
- Gill (Fig. 11 I) with stalk of dorsal triplet as thick as that of middle triplet............................... nr. sheilae 3
4 Gill with angle formed by stalks of ventral pair and dorsal triplet more than 90 degrees when viewed later- ally (Fig. 11 G) ...................................................................................................................... trangense n. sp.
- Gill (Fig. 11 B–F, H) with angle formed by stalks of ventral pair and dorsal triplet 90 degrees or less when viewed laterally............................................................................................................................................5
5 Gill (Fig. 11 D) with angle formed by stalks of ventral pair and dorsal triplet about 60 degrees when viewed laterally........................................................................................................................ nr. asakoae 3
- Gill (Fig. 11 B, C, E, F, H) with angle formed by stalks of ventral pair and dorsal triplet about 90 degrees when viewed laterally..................................................................................................................................6
6 Anterodorsal margin of cocoon somewhat produced anteriorly...................................... doisaketense n. sp.
- Anterodorsal margin of cocoon not produced anteriorly.............................................................................7
7 Gill (Fig. 11 B) with common basal stalk longer than stalk of middle triplet ........................ curtatum n. sp.
- Gill (Fig. 11 C, E, F) with common basal stalk shorter than stalk of middle triplet.....................................8
8 Gill (Fig. 11 F) with dorsal and middle groups composed of 1 individual and 2 paired filaments on stalk of moderate length ................................................................................................................................. sheilae
- Gill (Fig. 11 C, E) with dorsal and middle groups composed of 3 filaments arising close together............9
9 Gill (Fig. 11 C) with stalk of dorsal triplet thinner than that of middle triplet ......................... nr. asakoae 2
- Gill (Fig. 11 E) with stalk of dorsal triplet as thick as that of middle triplet............................ nr. asakoae 4
description: Published as part of Jitklang, Sanae, Kuvangkadilok, Chaliow, Baimai, Visut, Takaoka, Hiroyuki & Adler, Peter H., 2008, Cytogenetics and morphotaxonomy of the Simulium (Gomphostilbia) ceylonicum species group (Diptera: Simuliidae) in Thailand, pp. 1-28 in Zootaxa 1917 on page 24, DOI: 10.5281/zenodo.184626