A taxonomic revision of the Neotropical electric fish genus Brachyhypopomus (Ostariophysi: Gymnotiformes: Hypopomidae), with descriptions of 15 new species
Author
Crampton, William G. R.
Department of Biology, University of Central Florida, PO Box 162368, Florida, 32816 - 2368, USA.
crampton@ucf.edu
Author
Santana, Carlos D. de
Division of Fishes, Smithsonian Institution, National Museum of Natural History, 10 th and Constitution Avenue, NW, Washington, DC 20560 - 0159, USA.
apteronotidae@ig.com.br
Author
Waddell, Joseph C.
Department of Biology, University of Central Florida, PO Box 162368, Florida, 32816 - 2368, USA.
joecwaddell@knights.ucf.edu
Author
Lovejoy, Nathan R.
Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M 1 C 1 A 5, Canada
lovejoy@utsc.utoronto.ca
text
Neotropical Ichthyology
2016
e 150146
2016-12-31
14
4
639
790
http://dx.doi.org/10.1590/1982-0224-20150146
journal article
314778
10.1590/1982-0224-20150146
635170d7-a205-45be-90c7-807cc6d17f50
1982-0224
13331233
Table 21. Morphometrics for Brachyhypopomus walteri. HT, holotype; SD, standard deviation; dr., drainage. Data for holotype (nr. Manaus, Amazonas, Brazil) from Sullivan et al. (2013). Range for type region (Central Amazonas drainage) refers to non-type specimens from the vicinity of Tefé, Amazonas, Brazil. Specimens from the Upper rio Paraguay drainage are from Mato Grosso and Mato Grosso do Sul, Brazil. | Central Amazonas dr. (type region) | Upper Paraguay drainage |
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| HT | Range | Mean | SD | n | Range | Mean | SD | n |
|---|
| Total length (TL) (mm) | 163 | 75-180 | 127 | 24.8 | 86 | 106-154 | 128 | 16.6 | 14 |
|---|
| Length to end of anal fin (LEA) (mm) | 126 | 55-131 | 92 | 16.8 | 86 | 72-106 | 87 | 12.0 | 15 |
|---|
| Head length (HL) (mm) | 14.4 | 9.0-16.0 | 11.7 | 2.2 | 30 | 8.5-11.9 | 10.0 | 1.0 | 15 |
|---|
| Proportion of TL (%) |
|---|
| Caudal filament length (CF) | 22.7 | 18.2-35.0 | 27.5 | 3.6 | 86 | 29.0-36.1 | 32.6 | 1.9 | 14 |
|---|
| Proportion of LEA (%) |
|---|
| Head length (HL) | 11.4 | 10.9-13.8 | 12.1 | 0.8 | 29 | 10.2-12.2 | 11.4 | 0.6 | 15 |
|---|
| Snout to occiput (SO) | 8.5 | 8.9-11.8 | 9.9 | 0.6 | 29 | 7.8-11.4 | 9.4 | 1.0 | 15 |
|---|
| Snout to anal-fin origin (SA) | 19.9 | 17.8-26.6 | 20.5 | 2.0 | 29 | 14.7-18.9 | 16.7 | 1.2 | 15 |
|---|
| Snout to pectoral-fin base (PP) | | 12.7-15.2 | 13.7 | 0.7 | 29 | 9.7-14.0 | 12.8 | 1.2 | 15 |
|---|
| Longest pectoral-fin ray (PRL) | 5.4 | 4.5-7.7 | 6.5 | 0.7 | 29 | 4.9-6.5 | 5.7 | 0.5 | 15 |
|---|
| Anal fin length (AF) | | 75.0-83.2 | 80.3 | 2.1 | 27 | 80.8-85.9 | 83.6 | 1.6 | 15 |
|---|
| Longest anal-fin ray (ARL) | 4.6 | 1.3-3.5 | 2.1 | 0.5 | 28 | 3.1-5.2 | 4.1 | 0.5 | 15 |
|---|
| Body depth at anal-fin origin (BD1) | | 9.2-15.2 | 12.5 | 1.6 | 29 | 9.3-12.2 | 10.6 | 0.8 | 15 |
|---|
| Body width at anal-fin origin (BW1) | | 3.9-7.0 | 5.7 | 0.7 | 29 | 4.5-5.6 | 5.2 | 0.4 | 15 |
|---|
| Body depth at anal-fin middle (BD2) | | 6.6-11.2 | 8.9 | 0.9 | 27 | 6.7-9.4 | 8.3 | 0.7 | 15 |
|---|
| Body width at anal-fin middle (BW2) | | 1.6-2.9 | 2.2 | 0.3 | 27 | 1.6-3.3 | 2.4 | 0.4 | 15 |
|---|
| Caudal filament length (CF) | 29.4 | 27.9-52.8 | 38.8 | 6.4 | 18 | 40.8-56.4 | 48.6 | 4.1 | 14 |
|---|
| Proportion of HL (%) |
|---|
| Preorbital distance (PR) | 28.5 | 23.3-27.1 | 25.4 | 1.1 | 30 | 20.3-31.6 | 23.7 | 2.6 | 15 |
|---|
| Mouth width (MW) | 22.9 | 17.1-23.3 | 20.8 | 1.6 | 30 | 22.9-32.2 | 28.7 | 2.7 | 15 |
|---|
| Internarial distance (AE) | | 17.5-22.2 | 19.7 | 1.2 | 30 | 17.7-21.2 | 19.4 | 1.0 | 15 |
|---|
| Posterior naris to eye (PE) | 3.4 | 2.0-5.0 | 3.4 | 0.9 | 30 | 2.3-4.9 | 3.8 | 0.7 | 15 |
|---|
| Orbital diameter (OD) | 12.5 | 11.0-16.3 | 13.8 | 1.5 | 30 | 12.0-15.6 | 13.9 | 1.2 | 15 |
|---|
| Interorbital distance (IO) | 23.9 | 18.8-24.4 | 21.8 | 1.4 | 30 | 21.5-27.6 | 24.3 | 2.2 | 15 |
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| Head depth at eye (HD1) | | 44.4-53.2 | 49.7 | 2.0 | 30 | 45.2-51.7 | 48.9 | 1.7 | 15 |
|---|
| Head width at eye (HW1) | 42.2 | 28.9-42.9 | 35.9 | 3.4 | 30 | 33.3-46.0 | 39.1 | 3.5 | 15 |
|---|
| Head depth at occiput (HD2) | 79.0 | 67.1-84.7 | 76.3 | 3.7 | 30 | 72.9-84.4 | 78.3 | 3.4 | 15 |
|---|
| Head width at occiput (HW2) | | 46.2-60.5 | 52.2 | 4.1 | 30 | 47.3-57.1 | 52.6 | 2.6 | 15 |
|---|
| Postorbital distance (PO) | | 60.0-67.1 | 63.3 | 1.6 | 30 | 60.4-68.0 | 65.1 | 2.2 | 15 |
|---|
| Branchial aperture (BO) | 29.7 | 16.3-35.4 | 26.3 | 4.3 | 30 | 19.0-30.3 | 22.6 | 2.9 | 15 |
|---|
| Pectoral-fin base (PB) | | 10.3-15.6 | 13.4 | 1.4 | 30 | 10.3-14.1 | 11.6 | 1.1 | 15 |
|---|
| Caudal filament depth (CD) | 23.2 | 7.9-19.0 | 14.6 | 2.4 | 29 | 10.3-16.6 | 12.9 | 1.9 | 15 |
|---|
| Caudal filament width (CW) | | 3.3-6.7 | 4.6 | 0.9 | 29 | 4.3-7.0 | 6.0 | 0.8 | 15 |
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| Other proportions |
|---|
| BW1 (% of BD1) | | 39.7-52.5 | 46.1 | 3.4 | 30 | 42.3-53.2 | 48.6 | 2.9 | 15 |
|---|
| BW2 (% of BD2) | | 18.9-28.1 | 24.1 | 2.1 | 27 | 19.0-34.5 | 28.7 | 3.7 | 15 |
|---|