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Notoraja sereti  White, Last & Mana, 2017

Papuan velvet skate
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Notoraja sereti
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drawing shows typical fish in this Family.

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

Elasmobranchii (sharks and rays) > Rajiformes (Skates and rays) > Arhynchobatidae (Skates)
Etymology: Notoraja: Greek, noton = back + Latin, raja = fish, Raja sp. (Ref. 45335);  sereti: Named after the highly respected French ichthyologist, Dr. Bernard Séret.

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; bathydemersal; depth range 800 - 980 m (Ref. 116308).   Tropical

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

Western Central Pacific: Papua New Guinea.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 45.9 cm TL (female)

Short description Morphology | Morphometrics

This medium-size species is distinguished by the following set of characters: disc wider than long, width 47.1-50.3% TL, length 42.0-43.6% TL; head short (dorsal head length 15.2-16.2% TL; ventral head length 21.6-22.9% TL); snout relatively short (preorbital length 10.1-11.1% TL; ventral snout length 11.2-12.1% TL); interspiracular distance 5.3-5.9 TL, internasal distance 6.2-6.8% TL, preorbital length 2.4-3.0 times orbit length and 2.9-3.6 times interorbital; dorsal fins two, interdorsal space 1.1-1.9% TL; tail width at pelvic-fin axil 0.9-1.6 times its height; preorbital thorn single and small ; dorsal and most of ventral surface of disc entirely velvety, covered with fine denticles; adolescent male with median disc and pelvic fins naked; in females, anterior pelvic-fin lobe naked (skin naked or with sparse denticles ventrally on mid belly, chin, nasal curtain, and around cloaca); tail is long and slender, entirely velvety and without thorn-like denticles; lateral tail folds are moderately well developed; nasal lobes expanded, width of nasal curtain 7.9-8.3% TL; anterior pelvic-fin lobe is slightly shorter or similar length to posterior lobe; dorsal and ventral surfaces are greyish brown to dark bluish grey; total pectoral-fin radials 58-60; monospondylous centra 23-25, total diplospondylous centra 103-106, total centra 126-131 (Ref. 116308).

Biology     Glossary (e.g. epibenthic)

The species is known from three type specimens consisting of two females (45.9 and 45.8 cm TL) and an adolescent male (36.3 cm TL); based on the adolescent male size, the females are most likely adults (Ref. 116308).

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

Main reference Upload your references | References | Coordinator : McEachran, John | Collaborators

White, W.T., P.R. Last and R.R. Mana, 2017. A new species of velvet skate, Notoraja sereti n.sp. (Rajiformes: Arhynchobatidae) from Papua New Guinea. Zootaxa 4244(2):219-230. (Ref. 116308)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FishSource |

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Internet sources

Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | 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 = 0.5001   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00501 (0.00247 - 0.01018), b=3.12 (2.95 - 3.29), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.8   ±0.7 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Moderate to high vulnerability (51 of 100) .