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Jewel tetra, Serpae tetra
Hyphessobrycon eques (Steindachner, 1882)
Also calledTétra-joyau, Tétra-serpae (fra) · Tetra mato grosso (por)
The serpae tetra (Megalamphodus eques), also known as the Red Minor tetra, Callistus tetra, jewel tetra or blood characin, is a species of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American tetras. This species is found in South America.
Descriptions from checklists and floras indexed by GBIF
description
1. Dorsal end of laterosensory canal of preopercle and suprapreopercle (82): (0> 1) overlapping anterodorsal process of opercle. Paralleled in the Alestidae, in node 230, and in Bario steindachneri, Parecbasis cyclolepis, Pristella maxillaris, and Stichonodon insignis. 2. Foramen on articular condyle of quadrate (149): (0> 1) present. Paralleled in nodes 168, 211, and 231 and in Grundulus cochae, Hasemania nana, and Lonchogenys ilisha. 3. Distribution of denticles on gill rakers (202): (0> 1) along entire surface of gill rakers. Paralleled in node 269 and in Astyanax correntinus, Deuterodon langei, Hoplias cf. malabaricus, and Pristella maxillaris. 4. Pelvic-fin bony hooks in adult males of species bearing hooks on fins (309): (1> 0) absent. Paralleled in Creagrutus anary, Hyphessobrycon luetkenii, Phenacogaster tegatus, Pseudocorynopoma doriae, and Stethaprion erythrops. Some trees: Paralleled in Markiana nigripinnis and Psellogrammus kennedyi.
Phylogeny of the family Characidae (Teleostei: Characiformes): from characters to taxonomy
description
Body moderately deep; greatest depth contained 2.7 to 2.9 and caudal peduncle depth 9.7 to 10.6 times in SL; head length 3.6 to 3.9, predorsal distance 1.9 to 2.0 and caudal peduncle length 8.6 to 11.1 in SL; snout length 4.0 to 4.5, horizontal orbital diameter 2.0 to 2.4 and least interorbital width 3.2 to 3.5 in HL. Mouth terminal; inner row of premaxilla with 3 - 5, outer row with 3 - 4, dentary with 8 - 11 and maxilla with 2 - 3 teeth. Lateral line incomplete, with 4 - 5 pored scales; longitudinal series with 29 - 33 scales; transverse series above lateral line with 5 - 6 scale rows and below with 3 ½ - 4 scale rows. Dorsal fin with 10 - 12, pectoral fin with 12 - 14, pelvic fin with 7 rays, anal fin with 28 - 32 and caudal fin with 19 rays. Ground color reddish in life; large, transversely elogate, black humeral blotch. Pelvic, caudal and anal fins red (latter with black margin); pectoral fin hyaline; dorsal fin with black blotch (Graça, Pavanelli, 2007). Maximum standard length. 58.0 mm (Graça, Pavanelli, 2007).
Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated
From Wikipedia (CC BY-SA), quoted section by section
Description
The serpae tetra has a maximum standard length of 4 cm (1.6 in), and the body is laterally compressed and high. The overall colour is reddish-olive, brightening to scarlet along the flanks. There is a comma shaped black humeral spot and the dorsal fin is black, with the anal and caudal fins being red.
Range & habitat
The serpae tetra has a disjunct native range, with subpopulations in the Amazon basin of Brazil and in the La Plata basin in Argentina, Brazil, Bolivia, Paraguay and Uruguay. It has also been introduced to French Guiana and eastern Brazil. Its preferred habitat includes slow-flowing tributaries, floodplain lakes and associated flooded environments. It readily colonises anthropogenic aquatic habitats, such as artificial ponds and reservoirs. It is normally found close to submerged aquatic vegetation.
In human culture
The serpae tetra is classified in the genus Megalamphodus, which is Greek and means "with spacious ways", a name coined by Carl H. Eigenmann which he gave no explanation for. It may be an allusion to the "very large" fontanelles, the frontal bones being described as "entirely separate", that is, with a space between them and the parietal bones. The specific name, eques, means "horseman" or "rider", an allusion Steindachner did not explain but which may refer to the saddle-like mark on each side. Steindachner used this name for other fishes with similar markings.
Where it has been recorded
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
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In the stacks
Searching the stacks…
Every page naming Hyphessobrycon eques in the Biodiversity Heritage Library →
From the GBIF Backbone Taxonomy and occurrence records (GBIF.org), with Wikipedia and the Source Library. GBIF species 2354612.