Hydrolagus melanophasma  James, Ebert, Long & Didier, 2009

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

Holocephali (chimaeras) > Chimaeriformes (Chimaeras) > Chimaeridae (Shortnose chimaeras or ratfishes)
Etymology: Hydrolagus: Greek, hydr = water + Greek, lagos = hare (Ref. 45335);  melanophasma: The specific name is derived from melano- (Greek prefix) meaning black and –phasma (Greek noun) meaning specter or spirit. Vernacular: Eastern Pacific Black Ghostshark.

Environment / Climate / Range Ecology

Marine; benthopelagic; depth range 2 - 1720 m (Ref. 93040), usually 565 - 1720 m (Ref. 93040).   Subtropical; 35°N - 40°S, 125°W - 70°W (Ref. 93040)

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 120 cm TL male/unsexed; (Ref. 82286)

Short description Morphology | Morphometrics

A species of the genus Hydrolagus based on the absence of an anal fin. Hydrolagus melanophasma sp. nov. is distinguished from other chimaeroids by a blunt snout with minimal sloping from the orbit to the snout tip, a large slightly curved dorsal fin spine (25.9 % BDL) extending beyond first dorsal fin apex, and a long second dorsal fin (77.3–81.1% BDL) of uniform height throughout. The pectoral fins are large, reaching beyond the pelvic fin insertion when laid flat, trifid claspers forked for 27–27.8% of the total clasper length and the preopercular and oral lateral line canals branch separately or together from the infraorbital canal. Coloration after preservation is a uniform black with no distinct mottling or markings (Ref. 82286).

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

Eastern Pacific Ocean: From Baja California, Mexico to Validivia, Chile.

Biology     Glossary (e.g. epibenthic)

Main reference Upload your references | References | Coordinator | Collaborators

James, K.C., D.A. Ebert, D.J. Long and D.A. Didier, 2009. A new species of chimaera, Hydrolagus melanophasma sp. nov. (Chondrichthyes: Chimaeriformes: Chimaeridae), from the eastern North Pacific. Zootaxa 2218:59-68. (Ref. 82286)

IUCN Red List Status (Ref. 90363)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FisheriesWiki |

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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 | iSpecies | PubMed | Scirus | SeaLifeBase | Tree of Life | uBio | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00275 (0.00114 - 0.00667), b=3.11 (2.90 - 3.32), based on LWR estimates for this Subfamily-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  0.0   ±0.0 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  .
Vulnerability (Ref. 59153):  High vulnerability (63 of 100) .