Overview

Distribution

Acinocheirodon melanogramma is distributed in the São Francisco and Jequitinhonha River basins, Brazil (Malabarba & Weitzman, 1999; Malabarba, 2003).
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São Francisco and Jequitinhonha River basins, Brazil.
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South America: São Francisco and Jequitinhonha River basins in Brazil.
  • Malabarba, L.R. and S.H. Weitzman 1999 A new genus and species of South American fishes (Teleostei: Characidae: Cheirodontinae) with derived caudal fin, including comments about inseminating cheirodontines. Proc. Biol. Soc. Wash. 112(2):410-432. (Ref. 34062)
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Physical Description

Morphology

This species present the body slightly elongated, terminal to subterminal mouth. Likewise all members of the subfamily Cheirodontinae, it only presents one tooth row in the premaxilla and dentary. The teeth are pedunculated with several cusps. There is no humeral spot and a pseudotympanum instead is present on the humeral region. Acinocheirodon melanogramma presents a lateral line completely pored and no scales covering the caudal-fin lobes. The body does not present any conspicuous coloration, except a dark spot on the end of the caudal peduncle and a slightly yellowish caudal fin.
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Size

Maximum size registered for a male with 38 mm of standard length, from the tip of the snout to the base of the caudal fin (Malabarba & Weitzman, 1999).
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Max. size

3.8 cm SL (male/unsexed; (Ref. 34062))
  • Malabarba, L.R. and S.H. Weitzman 1999 A new genus and species of South American fishes (Teleostei: Characidae: Cheirodontinae) with derived caudal fin, including comments about inseminating cheirodontines. Proc. Biol. Soc. Wash. 112(2):410-432. (Ref. 34062)
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Diagnostic Description

Acinocheirodon melanogramma is diagnosed from all characids by the presence of one row of pedunculated teeth in the upper and lower jaws, presence of pseudotympanum, absent of humeral spot, lateral line completely perforated and the presence of hooks and hypertrophied tissue on the caudal fin.
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Ecology

Habitat

This species inhabits clear freshwater streams, in general with moderate current.
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Environment

benthopelagic; freshwater
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Life History and Behavior

Life Cycle

There is little information about the life history and behavior of Acinocheirodon melanograma. It is known that A. melanogramma is an inseminating species due to the observation of spermatozoa inside the ovary of females (Burns et al., 1997), however fertilized eggs and embryos were never observed. The males in a certain stage of maturation start to develop several sexually dimorphic features. Some of them are very common among the characids, like the presence of hooks in the pelvic- and anal-fin rays. Other differentiations are uniquely found in this species, like the presence of hooks on some of the caudal-fin rays associated with hypertrophied caudal tissue, in the shape of flaps (Malabarba & Weitzman, 1999).
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Acinocheirodon melanogramma

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 4
Species With Barcodes: 1
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Conservation

Threats

Not Evaluated
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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Wikipedia

Acinocheirodon melanogramma

Acinocheirodon melanogramma is a species of characin endemic to Brazil,[2] where it is found in the São Francisco and Jequitinhonha Rivers. It is the only member of its genus. It can be found in freshwater environments at a benthopelagic depth range.[3] They are native to a tropical climate. The average length of an unsexed male is about 3.8 cm (about 3.0 in). They are distributed in the São Francisco and Jequitinhonha River basins of Brazil.[4] This species prefer to live in fresh water with a moderate current. They have one row of teeth in the upper and lower jaw. The common names of A. melanogramma in Brazil are pequira, piabinha, and lambari.[5]


References[edit]

  1. ^ "Acinocheirodon melanogramma". Animal Diversity Web. Retrieved 30 March 2013. 
  2. ^ Froese, Rainer and Pauly, Daniel, eds. (2011). "Acinocheirodon melanogramma" in FishBase. October 2011 version.
  3. ^ "Acinocheirodon melanogramma". Encyclopedia of Life. Retrieved 30 March 2013. 
  4. ^ "Acinocheirodon melanogramma". Fish Base. Retrieved 30 March 2013. 
  5. ^ "Acinocheirodon Melanogramma". WikiPeixes. Retrieved 30 March 2013. 
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