Unexpectedly high diversity in a small basin: A taxonomic revision of Eurycheilichthys (Siluriformes: Loricariidae), with descriptions of seven new species
Author
Reis, Roberto E.
Laboratório de Sistemática de Vertebrados, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Av. Ipiranga 6681, Caixa Postal 1429, 90619 - 900 Porto Alegre, RS, Brazil
reis@pucrs.br
text
Neotropical Ichthyology
2017
2017-03-30
15
1
e 160068
1
28
http://dx.doi.org/10.1590/1982-0224-20160068
journal article
315419
10.1590/1982-0224-20160068
f98c2c91-cf4b-4493-9788-6e22d1d0e05f
1982-0224
20631692
Tab. 1. Descriptive morphometrics of Eurycheilichthys species. Values are given as percents of standard length or of head length. Hol = holotype. SD = standard deviation. Data in bold are distinguishing features among species.| Character | E. pantherinus n=23 | E. limulus n=26 | E. apocremnus n=18 | E. castaneus n=25 | E. coryphaenus n=10 |
|---|
| Low | High | Mean | Low | High | Mean | Hol | Low | High | Mean | Hol | Low | High | Mean | Hol | Low | High | Mean |
|---|
| Standard length (mm) | 33.0 | 48.1 | 42.6 | 41.3 | 50.4 | 45.8 | 47.0 | 38.1 | 54.1 | 45.5 | 48.1 | 37.2 | 49.6 | 44.0 | 46.7 | 36.2 | 49.7 | 41.2 |
|---|
| Percents of SL |
|---|
| Head length | 30.6 | 37.6 | 35.1 | 30.4 | 34.7 | 32.4 | 35.8 | 32.9 | 36.6 | 34.6 | 32.9 | 31.2 | 35.3 | 32.9 | 33.3 | 31.5 | 35.8 | 34.4 |
|---|
| Predorsal length | 43.5 | 49.4 | 45.6 | 42.9 | 47.6 | 45.3 | 45.0 | 40.8 | 47.0 | 44.3 | 42.9 | 40.6 | 47.4 | 43.4 | 44.1 | 41.0 | 45.0 | 43.7 |
|---|
| Dorsal-fin spine length | 19.9 | 24.5 | 22.2 | 18.3 | 23.5 | 20.4 | 23.7 | 21.1 | 24.6 | 23.2 | 21.4 | 19.8 | 23.8 | 21.8 | 21.8 | 21.8 | 24.0 | 23.0 |
|---|
| First anal-fin ray length | 14.9 | 19.0 | 17.3 | 16.1 | 22.3 | 18.3 | 20.3 | 18.3 | 22.1 | 20.7 | 19.9 | 17.6 | 22.1 | 19.8 | 18.0 | 16.7 | 19.3 | 18.0 |
|---|
| Pectoral-fin spine length | 21.8 | 27.4 | 24.1 | 19.8 | 24.7 | 22.4 | 23.6 | 21.6 | 26.1 | 24.2 | 22.4 | 20.9 | 25.5 | 23.2 | 26.2 | 24.1 | 27.4 | 26.2 |
|---|
| First pelvic-fin ray length | 16.4 | 20.8 | 18.7 | 13.0 | 21.4 | 16.9 | 21.7 | 20.4 | 23.3 | 21.8 | 20.4 | 17.5 | 21.1 | 19.4 | 16.9 | 16.9 | 20.1 | 18.3 |
|---|
| Trunk length | 12.6 | 15.6 | 14.0 | 12.7 | 16.4 | 15.0 | 15.2 | 14.1 | 16.4 | 15.2 | 14.5 | 12.4 | 14.9 | 13.9 | 14.7 | 12.7 | 15.8 | 14.8 |
|---|
| Abdominal length | 20.1 | 26.6 | 23.9 | 20.8 | 26.2 | 23.0 | 24.2 | 22.6 | 26.7 | 23.9 | 22.3 | 21.0 | 25.1 | 23.1 | 23.8 | 20.6 | 25.8 | 22.7 |
|---|
| Cleithral width | 27.3 | 32.0 | 29.9 | 23.8 | 26.8 | 25.2 | 30.4 | 28.4 | 31.8 | 30.1 | 27.8 | 24.9 | 29.7 | 26.8 | 27.8 | 26.2 | 29.5 | 27.4 |
|---|
| Body depth at dorsal fin | 13.2 | 18.0 | 14.8 | 14.1 | 19.2 | 16.3 | 17.8 | 14.7 | 18.4 | 16.7 | 15.4 | 13.8 | 16.7 | 15.2 | 17.3 | 15.1 | 18.7 | 16.8 |
|---|
| Body width at anal fin | 11.5 | 14.6 | 12.8 | 11.2 | 14.5 | 13.1 | 12.8 | 12.0 | 14.0 | 12.9 | 12.5 | 11.9 | 13.9 | 12.9 | 12.9 | 12.2 | 13.9 | 13.1 |
|---|
| Caudal peduncle length | 27.2 | 35.5 | 31.0 | 26.0 | 35.3 | 32.8 | 29.5 | 24.7 | 33.4 | 28.7 | 34.9 | 25.4 | 34.9 | 31.9 | 31.7 | 23.6 | 32.6 | 30.2 |
|---|
| Caudal peduncle depth | 7.8 | 10.2 | 8.7 | 9.6 | 11.5 | 10.5 | 11.6 | 10.2 | 12.3 | 11.1 | 10.6 | 9.8 | 12.4 | 10.5 | 10.0 | 9.5 | 10.6 | 10.0 |
|---|
| Percents of HL |
|---|
| Snout length | 48.6 | 63.2 | 54.5 | 49.0 | 60.0 | 53.2 | 53.2 | 50.0 | 59.3 | 55.8 | 52.5 | 50.8 | 58.3 | 53.5 | 50.5 | 48.5 | 54.1 | 51.8 |
|---|
| Orbital diameter | 13.4 | 18.8 | 16.0 | 10.9 | 14.5 | 12.1 | 10.0 | 9.5 | 14.2 | 11.4 | 12.0 | 10.8 | 14.9 | 12.2 | 13.9 | 13.8 | 18.5 | 15.7 |
|---|
| Interorbital width | 31.3 | 42.3 | 34.2 | 35.9 | 44.3 | 39.2 | 34.2 | 29.6 | 38.3 | 35.0 | 35.5 | 31.9 | 37.5 | 35.1 | 35.0 | 32.8 | 37.3 | 35.6 |
|---|
| Head depth | 42.2 | 53.9 | 45.3 | 43.3 | 53.8 | 47.6 | 46.4 | 43.2 | 48.6 | 46.5 | 48.7 | 44.7 | 53.3 | 47.8 | 49.2 | 47.8 | 54.0 | 50.0 |
|---|
| Left mandibular ramus | 9.2 | 12.5 | 10.4 | 10.0 | 14.1 | 11.8 | 12.6 | 9.1 | 14.4 | 12.4 | 9.6 | 8.2 | 11.1 | 9.7 | 12.2 | 9.3 | 13.2 | 11.7 |
|---|