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Parakysis hystriculus  Ng, 2009

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Parakysis hystriculus
Picture by Ng, H.H.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Siluriformes (Catfish) > Akysidae (Stream catfishes) > Parakysinae
Etymology: Parakysis: Greek, para = the side of + Greek, kysthos = bladder (Ref. 45335);  hystriculus: From the Latin adjective hystriculus, meaning hairy or bearded; in reference to the long accessory mandibular barbels of this species.

Environment / Climate / Range Ecology

Freshwater; benthopelagic.   Tropical, preferred ?; 1°S - 2°S, 103°E - 104°E

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South East Asia : Sumatra. Known from the Lalang River drainage in southern Sumatra (Ref. 80319).

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 2.9 cm SL male/unsexed; (Ref. 80319)

Short description Morphology | Morphometrics

Parakysis hystriculus is distinguished from other members of the genus in having a combination of: branched pelvic-fin rays with anterior branch always shorter than posterior branch (vs. almost same length in congeners), lateral edges of head evenly sloping in dorsal view (vs. gently curving in congeners), anteriormost pair of accessory inner mandibular barbels longer than (vs. equal to or shorter than in congeners) distance separating bases of left and right barbel, outer mandibular barbel with one accessory barbel (vs. absent in P. anomalopteryx), mandibular laterosensory pore between bases of inner and outer mandibular barbels present (vs. absent in P. anomalopteryx), margin of lower lip with medial concavity (vs. entire in P. anomalopteryx), anal fin rounded (vs. polygonal or rectangular in P. grandis), caudal fin with narrow lobes having evenly-tapering posteromedial margins (vs. broad lobes with curved posteromedial margins in P. grandis and P. longirostris) and 10 (vs. 11 in P. verrucosus) branched rays without secondary branches (vs. with secondary branching in P. grandis) (Ref. 80319).

Biology     Glossary (e.g. epibenthic)

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Ng, H.H., 2009. Parakysis hystriculus, a new species of catfish (Siluriformes: Akysidae) from Sumatra. Zootaxa 1977:39-48. (Ref. 80319)

IUCN Red List Status (Ref. 109396)

  Not Evaluated 

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FisheriesWiki |

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Summary page | Point data | Common names | Photos

Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5156   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), based on all LWR estimates for this body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.3   ±0.5 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months ().
Vulnerability (Ref. 59153):  Low vulnerability (10 of 100) .