Unexpected species diversity within Sri Lanka’s snakehead fishes of the Channa marulius group (Teleostei: Channidae)
Author
Sudasinghe, Hiranya
Author
Adamson, Eleanor A. S.
Author
Ranasinghe, R. H. Tharindu
Author
Meegaskumbura, Madhava
Author
Ikebe, Chiho
Author
Britz, Ralf
text
Zootaxa
2020
2020-03-02
4747
1
113
132
journal article
23777
10.11646/zootaxa.4747.1.4
d1d12eda-0dbe-46d4-97f9-95a9de472c8a
1175-5326
3693477
1F1FC50F-1C99-4EC8-8224-EA5FC67F1993
TABLE 1. Morphometric data of Channa ara (n=3; 2020.02.01.NH, DZ 4517, UPZM uncatalogued), C. marulius (Sri Lanka) (n=8; DZ 4900, DZ 5228–5234) and C. cf. ara (Sri Lanka) (n=3; DZ 4010, DZ 4330, DZ 4394). | | Channa ara | | C. marulius (Sri Lanka) | C. cf. ara (Sri Lanka) |
|---|
| Min | Max | Mean | S.D | Min | Max | Mean | S.D | Min | Max | Mean | S.D |
|---|
| Standard length (mm) | 294 | 650 | | | 300 | 402 | | | 230 | 394 | | |
|---|
| In percent of standard length |
|---|
| Predorsal length | 32.0 | 36.1 | 34.4 | 2.1 | 28.7 | 30.9 | 30.0 | 0.9 | 31.5 | 33.2 | 32.1 | 0.9 |
|---|
| Preanal length | 51.0 | 55.8 | 53.0 | 2.5 | 49.8 | 53.0 | 51.3 | 1.2 | 47.0 | 50.9 | 49.2 | 2.0 |
|---|
| Prepelvic length | 33.7 | 34.8 | 34.3 | 0.8 | 30.1 | 31.3 | 30.7 | 0.4 | 29.6 | 32.1 | 30.7 | 1.3 |
|---|
| Prepectoral length | 30.8 | 33.0 | 31.6 | 1.2 | 27.1 | 28.7 | 28.2 | 0.6 | 29.1 | 31.2 | 29.9 | 1.1 |
|---|
| Dorsal-fin length | 63.2 | 71.0 | 67.4 | 3.9 | 63.0 | 66.5 | 64.4 | 1.4 | 39.6 | 72.0 | 58.1 | 16.7 |
|---|
| Anal-fin length | 36.6 | 39.5 | 37.8 | 1.5 | 40.3 | 44.8 | 42.3 | 1.4 | 40.1 | 60.4 | 47.0 | 11.6 |
|---|
| Pectoral-fin length | 17.0 | 19.4 | 18.5 | 1.3 | 14.3 | 17.6 | 16.6 | 1.0 | 14.8 | 17.8 | 16.6 | 1.6 |
|---|
| Pelvic-fin length | 10.9 | 12.6 | 11.8 | 1.2 | 7.1 | 11.1 | 10.3 | 1.3 | 8.6 | 10.7 | 9.4 | 1.1 |
|---|
| Body depth | 17.1 | 20.3 | 18.4 | 1.7 | 14.1 | 16.9 | 15.2 | 0.8 | 14.3 | 28.3 | 19.4 | 7.7 |
|---|
| Body width | 14.0 | 15.5 | 14.6 | 0.8 | 11.2 | 16.0 | 13.0 | 1.5 | 11.7 | 12.4 | 12.0 | 0.4 |
|---|
| Caudal peduncle length | 7.4 | 9.9 | 8.9 | 1.3 | 7.3 | 8.6 | 8.1 | 0.5 | 7.5 | 8.5 | 7.9 | 0.5 |
|---|
| Caudal peduncle depth | 7.8 | 8.8 | 8.5 | 0.6 | 6.9 | 7.9 | 7.3 | 0.3 | 7.0 | 8.8 | 7.7 | 1.0 |
|---|
| Head length | 28.5 | 34.0 | 31.4 | 2.8 | 27.6 | 29.1 | 28.3 | 0.5 | 30.3 | 31.2 | 30.7 | 0.5 |
|---|
| Head depth | 7.6 | 14.6 | 11.8 | 3.7 | 10.3 | 14.9 | 12.5 | 1.6 | 11.9 | 14.8 | 13.3 | 1.5 |
|---|
| Head width | 19.1 | 20.0 | 19.7 | 0.5 | 15.5 | 18.1 | 16.7 | 1.0 | 17.1 | 18.9 | 17.8 | 0.9 |
|---|
| In percent of head length |
|---|
| Snout length | 20.2 | 22.6 | 21.5 | 1.2 | 19.3 | 23.5 | 21.6 | 1.5 | 19.8 | 22.6 | 21.2 | 1.4 |
|---|
| Eye diameter | 9.8 | 11.4 | 10.7 | 0.8 | 10.8 | 12.9 | 11.6 | 0.7 | 10.0 | 14.0 | 11.5 | 2.2 |
|---|
| Preorbital depth | 17.7 | 22.5 | 20.1 | 2.4 | 18.5 | 21.9 | 20.3 | 1.3 | 16.8 | 19.4 | 18.4 | 1.4 |
|---|
| Postorbital depth | 25.3 | 26.6 | 26.1 | 0.7 | 24.5 | 28.8 | 26.8 | 1.7 | 23.4 | 27.2 | 25.5 | 1.9 |
|---|
| Interorbital width | 25.7 | 29.8 | 27.1 | 2.3 | 25.7 | 27.6 | 26.6 | 0.8 | 25.2 | 28.5 | 26.8 | 1.7 |
|---|
| Upper jaw length | 34.0 | 41.4 | 37.0 | 3.9 | 37.0 | 40.3 | 38.8 | 1.0 | 30.4 | 36.0 | 33.5 | 2.8 |
|---|