Paedocypris progenetica

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Paedocypris progenetica
Paedocypris progenetica 001.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cypriniformes
Suborder: Cyprinoidei
Family: Paedocyprididae
Genus: Paedocypris
Species:
P. progenetica
Binomial name
Paedocypris progenetica

Paedocypris progenetica (also known as Indonesian Superdwarf Fish [3] ) is a species of tiny cyprinid fish endemic to the Indonesian islands of Sumatra and Bintan where it is found in peat swamps and slow flowing blackwater streams. [2] It was discovered by Singaporean ichthyologist Heok Hui Tan in 2006. He has written a description of the fish along with another species of the same genus called Paedocypris micromegethes .

Contents

It is one of the smallest known fish in the world, together with species such as Schindleria brevipinguis , with the females reaching a maximum standard length of 10.3 mm (0.41 in), and the males reaching a maximum st 9.8 mm (0.39 in) and the smallest known mature specimen, a female, measuring only 7.5 mm (0.30 in). [4] It held the record for the shortest known vertebrate until the frog Paedophryne amauensis was formally described in January 2012, and the parasitic males of the anglerfish Photocorynus spiniceps are only 6.2 millimetres (0.24 in) long. [5] The smallest individual of the fish reported mature weighed just 0.7mg, while the largest weighed 5mg.

The fish's diet consists of small planktonic rotifers and cladocerans.

Anatomy

Due to its size, the fishes' skeleton is very rudimentary. Its spine is made of 33 - 35 vertebrae and it has a roofless skull. The Indonesian Superdwarf Fish displays unique reproductive adaptations, including modified pelvic fins in males, with its survival threatened by habitat destruction.

See also

References

  1. "Paedocypris progenetica". IUCN Red List of Threatened Species .
  2. 1 2 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" (PDF). Proceedings of the Royal Society B. 273 (1589). The Royal Society: 895–899. doi:10.1098/rspb.2005.3419. PMC   1560243 . PMID   16627273. Archived from the original (PDF) on 12 July 2009. Retrieved 26 October 2012.
  3. "Paedocypris progenetica - Indonesian Superdwarf Fish". iNaturalist.
  4. Busson, Frédéric; Froese, Rainer (15 November 2011). "Paedocypris progenetica". FishBase. Retrieved 13 January 2012.
  5. "World's tiniest frogs found in Papua New Guinea". The Australian . 12 January 2012. Retrieved 19 September 2018.