Overview

Comprehensive Description

Biology

One of the smallest fish and vertebrate known, with the smallest mature female measuring a mere 7.9 mm (Ref. 56152).
  • Kottelat, M., R. Britz, H.H. Tan and K.-E. Witte 2005 Paedocypris, a new genus of Southeast Asian cyprinid fish with a remarkable sexual dimorphism, comprises the world's smallest vertebrate. Proc. Royal Soc. Biol. Sci. 273:895-899. (Ref. 56152)
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Distribution

Southeast Asia: Indonesia.
  • Kottelat, M., R. Britz, H.H. Tan and K.-E. Witte 2005 Paedocypris, a new genus of Southeast Asian cyprinid fish with a remarkable sexual dimorphism, comprises the world's smallest vertebrate. Proc. Royal Soc. Biol. Sci. 273:895-899. (Ref. 56152)
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Physical Description

Size

Max. size

1.0 cm SL (male/unsexed; (Ref. 56152)); 1.03 cm SL (female)
  • Kottelat, M., R. Britz, H.H. Tan and K.-E. Witte 2005 Paedocypris, a new genus of Southeast Asian cyprinid fish with a remarkable sexual dimorphism, comprises the world's smallest vertebrate. Proc. Royal Soc. Biol. Sci. 273:895-899. (Ref. 56152)
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Diagnostic Description

Paedocypris progenetica is distinguished from Paedocypris micromegethes by: a smaller maximum size (male 9.8mm, versus 11.6; female 10.3mm, versus 11.4), keratinized pad in front of male pelvic fins as a projecting knob (versus flat to slightly swollen), breeding tubercles on the dentary arranged in a straight row, without forming a cluster (versus forming a cluster of up to five closely set individual tubercles, subdistally on the lateral side of the dentary, supported by a conspicuous lateral bony extension), pelvic fins of female vestigial, or often missing (versus smaller than in male but similarly shaped), presence of pre-anal-fin-fold in female (a character unique among teleosts; versus absent in both sexes), dense small chromatophores in deep layer on abdomen appearing as a continuous patch, tiny black vermiculations on belly from throat to anus, including on male's pre-pelvic keratinized knob (versus large superficial, isolated chromatophores on belly from throat to anus, absent on male's keratinized pad), numerous small, contiguous chromatophores on middorsal line, organized in 3-5 rows, forming a broad stripe (versus few large isolated chromatophores, forming 1-3 irregular rows), pelvic-fin rays plain brown (versus with rows of spots) (Ref. 56152).
  • Kottelat, M., R. Britz, H.H. Tan and K.-E. Witte 2005 Paedocypris, a new genus of Southeast Asian cyprinid fish with a remarkable sexual dimorphism, comprises the world's smallest vertebrate. Proc. Royal Soc. Biol. Sci. 273:895-899. (Ref. 56152)
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Ecology

Habitat

Environment

benthopelagic; freshwater
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Paedocypris progenetica

The following is a representative barcode sequence, the centroid of all available sequences for this species.


No available public DNA sequences.

Download FASTA File
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Statistics of barcoding coverage: Paedocypris progenetica

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 1
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

Paedocypris progenetica

Paedocypris progenetica is a species of cyprinid fish endemic to Sumatra (Indonesia) where it is found in peat swamps and blackwater streams. It is the smallest known fish in the world with females reaching a maximum size of 10.3 mm, males 9.8 mm and the smallest known mature specimen, a female, measured only 7.9 mm.[2] It held the record for the smallest known vertebrate until the frog Paedophryne amauensis was formally described in January 2012.[3] However, the methods used to measure fish (from snout tip to end of tail) and frogs (from snout tip to anus) are so different that a comparison makes little biological sense.

References[edit]

  1. ^ Kottelat, Maurice; Britz, Ralf; Heok Hui, Tan; Witte, Kai-Erik (2005). "Paedocypris, a new genus of Southeast Asian cyprinid fish with a remarkable sexual dimorphism, comprises the world’s smallest vertebrate". Proceedings of the Royal Society B (The Royal Society) 273: 895–899. doi:10.1098/rspb.2005.3419. Retrieved 26 October 2012. 
  2. ^ Busson, Frédéric; Froese, Rainer (15 November 2011). "Paedocypris progenetica". FishBase. Retrieved 13 January 2012. 
  3. ^ "World's tiniest frogs found in Papua New Guinea". The Australian. 12 January 2012. Retrieved 11 January 2012. 
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