Prorivulus auriferus
| Notice: | This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see page history). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions.
If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly. This page should be cited as follows (rationale):
Citation formats to copy and paste
BibTeX: @article{Costa2004Zootaxa642, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Costa2004Zootaxa642">{{Citation |
Ordo: Cyprinodontiformes
Familia: Rivulidae
Genus: Prorivulus
Name
Prorivulus auriferus Costa, Lima & Suzart – Wikispecies link – Pensoft Profile
- Prorivulus auriferus Costa, Wilson J. E. M., 2004, Zootaxa 642: 3-6.
Materials Examined
Holotype.UFRJ5932, male, 30.3 mm SL; Brazil: Estado da Bahia: Valença, coastal stream (24 L 0 503477 UTM 8505050); A. O. Lima & R. R. Suzart, 28 June 2003. Paratypes.UFRJ 5933, 1 female, 22.9 mm SL, and 3 juveniles, 13.1–15.5 mm SL; UFRJ 5934, 1 male, 28.5 mm SL, and 2 juveniles, 17.0– 18.3 mm SL (c&s); collected with holotype.
Diagnosis
Diagnosis:As for the genus.
Description
Description: Morphometric data given in Table 1. Male larger than female, largest male 30.3 mm SL. Dorsal profile slightly convex from snout to end of dorsalfin base, approximately straight on caudal peduncle. Ventral profile convex on head, almost straight from anterior portion of venter to end of analfin base, nearly straight to slightly concave on caudal peduncle. Body slender, subcylindrical anteriorly, slightly deeper than wide, to compressed posteriorly. Greatest body depth at level of pelvicfin base.
Dorsal and anal fins rounded. Caudal fin oval. Pectoral fin rounded, posterior margin on vertical through pelvicfin base in male, just anterior to it in female. Tip of pelvic fin reaching between base of 2 nd and 3 rd analfin ray in male, and urogenital opening in female. Pelvicfin bases in close proximity. Dorsalfin origin on vertical through base of 8 th or 9 th analfin ray, and between neural spines of 19 th and 21 st vertebra. Analfin origin between pleural ribs of 13 th and 15 th vertebra. Dorsalfin rays 9–10; analfin rays 14– 15; caudalfin rays 32–33; pectoralfin rays 13; pelvicfin rays 7.
Scales large, cycloid. Body and head entirely scaled, except anterior ventral surface of head. Few scales on caudalfin base; no scales on dorsal and anal fins. Frontal squamation Epatterned; Escales overlapping medially; scales arranged in circular pattern around central Ascale without exposed margins. Longitudinal series of scales 31–33; transverse series of scales 8; scale rows around caudal peduncle 16. Contact organs absent. Supraorbital neuromasts 3 + 3.
Ventral process of anguloarticular broad. Rostral cartilage longer than wide, width about 65 % of length. Basihyal narrow, subrectangular, greatest width about 30 % of length; basihyal cartilage about 25 % of basihyal length. Interhyal vestigial, not ossified. Five branchiostegal rays. One or two teeth on second pharyngobranchial. First epibranchial straight. Distal process of second epibranchial absent. Uncinate process of third epibranchial long. Gillrakers of first branchial arch 1 + 8. Two vomerine teeth. Dorsal tip of preopercle with short canal. Dermosphenotic present. Ventral process of posttemporal short. Neural prezygapophyses short, about 10 % of neural spine length in fifth caudal vertebra. Epipleural ribs rodlike. Total vertebrae 31–32.
males holotype male paratype female paratype Prepelvic length 53.7 53.3 57.7 UFRJ 5932UFRJ 5934UFRJ 5933Standard length (mm) Percents of standard length30.3 28.5 22.9Body depth Caudal peduncle depth Predorsal length20.5 14.3 75.7 19.7 13.7 77.2 19.9 13.0 77.6 Length of dorsalfin base 10.3 9.5 10.1 Length of analfin base 22.1 22.0 21.3 Caudalfin length 38.9 40.3 39.3 Pectoralfin length 23.5 25.2 23.0 Pelvicfin length 13.6 14.6 11.2 Head length 25.8 26.8 27.1Percents of head length Head depth 60.6 61.8 59.0 Head width 72.7 70.6 68.6 Snout length 13.3 15.6 13.2 Lower jaw length 20.5 18.6 17.8 Eye diameter 35.5 37.9 38.1Coloration in life:Male: Side of body light gray with irregular shaped golden blotches below lateral midline, and zigzag dark purplish gray stripe on lateral midline overlapped by oblique bars of same color scattered over flank. Dorsum light yellowish brown, venter light yellow. Postorbital pale brown, golden on ventral portion of opercle. Infraorbital region and ventral surface of head light yellow. Lower jaw dark brown. Iris light yellow. Dorsal fin hyaline with pale gray dots and narrow yellow distal margin. Anal fin yellow with narrow black margin, light blue on base. Caudal fin light blue with pale yellow dots and dark gray distal margin. Pelvic fin yellow. Pectoral fin yellowish hyaline. Female: Side of body light gray with zigzag dark gray to black stripe on lateral midline. Dorsum light brown, venter light gray. No distinctive black spot on posterior portion of caudal peduncle nor on caudalfin base. Postorbital region with black stripe, pale golden on ventral portion of opercle. Infraorbital region and ventral surface of head light gray. Lower jaw dark gray to black. Iris light yellow. Dorsal and anal fins pale yellow with transverse rows of small dark gray spots; distal margin of anal fin black. Caudal fin light yellow with narrow dark gray bars. Paired fins hyaline.
Distribution
Distribution: Known only from the type locality, a coastal plain brook in the Município de Valença, northeastern Brazil. Habitat notes: The type series was collected in a shallow (about 40 cm deep), small freshwater brook within a forest, near a salt water canal. It is situated in a coastal region, with a net of canals forming a series of small islands. The water was reddish brown, acid (pH 4.0), not turbid. The only other fish species found was the characid Hyphessobrycon cf. itaparicensis Lima & Costa.
Etymology
Etymology: From the Latin auriferus (auriferous), referring to the male color pattern consisting of golden spots on the flank.
Taxon Treatment
- Costa, Wilson J. E. M.; 2004: A new killifish genus and species from the coastal plains of northeastern Brazil (Teleostei: Cyprinodontiformes: Rivulidae), Zootaxa 642: 3-6. doi
This treatment was originally uploaded by Plazi, compare this treatment on Plazi. Unless this treatment has been substantially changed on Species-ID, Plazi requests to maintain a link back to the original repository.
