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 1. Morphometric data of Potamotrygon falkneri from Paraná-Paraguay basin. Data are expressed in milimeters and percentages of disc width (% DW). SD = Standard deviation.| Measurements | Paratype | n | Range | Mean | SD |
|---|
| mm | mm | %DW | %DW | %DW |
|---|
| Total length | 523 | 65 | 415-890 | 117.8-198.2 | 178.9 | 4.6 |
|---|
| Disc length | 286 | 65 | 245-578 | 102.1-114.7 | 107.2 | 0.3 |
|---|
| Disc width | - | 65 | 230-518 | - | - | 0.0 |
|---|
| Interorbital space | 38 | 65 | 25-75 | 11.0-15.1 | 11.8 | 0.3 |
|---|
| Interspiracular space | 55 | 65 | 42-110 | 15.9-21.9 | 18.0 | 0.4 |
|---|
| Eye length | - | 65 | 7-14 | 2.3-4.3 | 3.3 | 0.1 |
|---|
| Spiracle length | - | 65 | 16-48 | 6-8.9.0 | 7.4 | 0.0 |
|---|
| Sting length | 68 | 65 | 42-91 | 15.8-25.5 | 20.4 | 0.3 |
|---|
| Sting width | 5 | 65 | 3-9 | 1.2-3.0 | 1.8 | 0.1 |
|---|
| Preorbital length | - | 48 | 49-133 | 21.0-26.5 | 24.5 | 0.1 |
|---|
| Prenasal length | - | 65 | 33-88 | 13.0-20.8 | 17.0 | 0.5 |
|---|
| Preoral length | - | 65 | 45-113 | 17.4-27.6 | 22.2 | 0.3 |
|---|
| Internarial space | - | 65 | 18-44 | 7.0-10.0 | 8.4 | 0.0 |
|---|
| Mouth width | - | 65 | 18-53 | 6.8-10.9 | 8.6 | 0.3 |
|---|
| st Space between 1 branchial slits | 71 | 65 | 51-120 | 21.4-26.1 | 23.8 | 0.0 |
|---|
| Space between 5 th branchial slits | 49 | 65 | 35-88 | 14.6-18.1 | 16.2 | 0.2 |
|---|
| Branchial basket length | 41 | 65 | 35-81 | 14.2-17.6 | 15.7 | 0.0 |
|---|
| Pelvic fin length | 74 | 65 | 48-123 | 18.6-29.0 | 24.0 | 0.2 |
|---|
| Pelvic fin width | - | 29 | 116-293 | 31.8-64.6 | 57.0 | 2.4 |
|---|
| Clasper external edge length | - | 29 | 13-55 | 5.4-15.0 | 12.7 | 1.1 |
|---|
| Clasper internal edge length | - | 65 | 35-120 | 15.0-29.8 | 24.8 | 1.9 |
|---|
| Cloaca to tail tip | 255 | 65 | 218-462 | 75.3-104.3 | 87.9 | 2.1 |
|---|
| Tail width | 38 | 65 | 31-90 | 9.0-16.9 | 13.3 | 0.6 |
|---|
| Snout to cloaca | 244 | 65 | 189-460 | 71.5-97.4 | 87.3 | 1.0 |
|---|
| Axilla pectoral to posterior edge of pelvic fin | 40 | 65 | 28-80 | 11.0-17.8 | 13.7 | 0.2 |
|---|
| Cloaca to sting | 153 | 65 | 112-330 | 44.0-81.9 | 52.0 | 2.3 |
|---|