A taxonomic and morphological redescription of Potamotrygon falkneri Castex & Maciel, 1963 (Chondrichthyes: Myliobatiformes: Potamotrygonidae)
Author
da Silva, João Paulo C. B.
Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo. Rua do Matão, Travessa 14, 101, 05508 - 900 São Paulo, SP, Brazil
jpcbs@ib.usp.br
Author
de Carvalho, Marcelo R.
Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo. Rua do Matão, Travessa 14, 101, 05508 - 900 São Paulo, SP, Brazil
mrcarvalho@ib.usp.br
text
Neotropical Ichthyology
2011
2011-03-31
9
1
209
232
https://doi.org/10.1590/s1679-62252011000100021
journal article
313388
10.1590/s1679-62252011000100021
5881ab01-ee4b-437f-b949-5f06c385b9bc
1982-0224
17871481
Table 2. Morphometric data of Potamotrygon falkneri from the upper Amazon basin. Data are expressed in millimeters and percentages of disc width (% DW). SD = Standard deviation.| Measurements | n | Range | Mean | SD |
|---|
| mm | %DW | %DW | %DW |
|---|
| Total length | 10 | 522-815 | 174.6-202.3 | 187.5 | 8.6 |
|---|
| Disc length | 10 | 234-488 | 103.7-113.0 | 108.2 | 3.4 |
|---|
| Disc width | 10 | 225-432 | - | - | - |
|---|
| Interorbital space | 10 | 23-58 | 10.2-13.5 | 12.3 | 0.9 |
|---|
| Interspiracular space | 10 | 38-76 | 16.6-18.9 | 17.5 | 0.7 |
|---|
| Eye length | 10 | 12-26 | 3.9-8.7 | 5.8 | 1.4 |
|---|
| Spiracle length | 10 | 24-39 | 7.4-10.7 | 9.0 | 1.1 |
|---|
| Sting length | 10 | 61-96 | 20.0-30.6 | 23.7 | 3.1 |
|---|
| Sting width | 10 | 6-9 | 1.6-2.6 | 2.0 | 0.3 |
|---|
| Preorbital length | 10 | 55-111 | 23.3-27.5 | 25.3 | 1.4 |
|---|
| Prenasal length | 10 | 42-81 | 15.3-18.9 | 16.9 | 1.2 |
|---|
| Preoral length | 10 | 56-110 | 21.2-25.6 | 23.5 | 1.4 |
|---|
| Internarial space | 10 | 19-38 | 7.7-9.3 | 8.4 | 0.6 |
|---|
| Mouth width | 10 | 24-47 | 8.5-11.7 | 10.2 | 1.1 |
|---|
| st Space between 1 branchial slits | 10 | 55-111 | 23.2-26.2 | 24.5 | 1.1 |
|---|
| Space between 5 th branchial slits | 10 | 36-80 | 16.0-19.7 | 17.7 | 1.1 |
|---|
| Branchial basket length | 10 | 29-68 | 12.9-16.4 | 15.1 | 1.1 |
|---|
| Pelvic fin length | 10 | 47-104 | 20.7-27.3 | 24.2 | 2.3 |
|---|
| Pelvic fin width | 10 | 108-260 | 48.0-67.4 | 58.1 | 6.1 |
|---|
| Clasper external edge length | 10 | 38-60 | 11.3-14.4 | 13.5 | 1.2 |
|---|
| Clasper internal edge length | 10 | 29-111 | 12.9-26.7 | 23.7 | 4.9 |
|---|
| Cloaca to tail tip | 10 | 196-406 | 68.5-110.2 | 93.5 | 12.7 |
|---|
| Tail width | 10 | 30-95 | 13.3-25.4 | 17.8 | 3.3 |
|---|
| Snout to cloaca | 10 | 190-391 | 84.4-92.5 | 89.2 | 2.7 |
|---|
| Pectoral axil to posterior edge of pelvic fin | 10 | 29-71 | 12.3-17.4 | 14.7 | 2.0 |
|---|
| Cloaca to sting | 10 | 150-276 | 50.3-64.3 | 56.3 | 4.5 |
|---|