Isistius plutodus, Largetooth cookiecutter shark

Isistius plutodus Garrick & Springer, 1964

Largetooth cookiecutter shark
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Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Isistius plutodus   AquaMaps   Data sources: GBIF OBIS
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Isistius plutodus
Juvenile Immagine di Sazima, I.

Classificazione / Nomi Nomi Comuni | Sinonimi | Catalog of Fishes(Genere, Specie) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchi (squali e razze) (sharks and rays) > Squaliformes (Sleeper and dogfish sharks) > Dalatiidae (Sleeper sharks)
Etymology: Isistius: Etymology not explained, probably iso-, from isos (Gr.), equal; istius, from histion (Gr.), sail (i.e., dorsal fin), referring to its two similarly shaped and sized (and posterior) dorsal fins, a character Gill used to diagnose genus. José I. Castro, The Sharks of North America (Oxford University Press, 2011), suggests name may allude to the Egyptian goddess Isis, represented in statuary with her head veiled, or to the dark collar encircling throat of I. brasiliensis, “which could also suggest a veil over the head” (p. 145). This interpretation is rejected by the fact that Gill often used “istius” in the names of several genera distinguished (at least in part) by their dorsal fins (Acanthistius, Brachyistius, Caristius, Dichistius, Goniistius, Iniistius, Micromesistius, Nematistius) (See ETYFish)plutodus: ploutos (Gr.), wealth or abundance; odon (Gr.), tooth, referring to larger size of lower jaw teeth compared with congeners (See ETYFish).

Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione Ecologia

marino pelagic-neritic; distribuzione batimetrica 60 - 200 m (Ref. 52580). Subtropical; 44°N - 33°S (Ref. 52580)

Distribuzione Territories | Aree FAO | Ecosistemi | Presenze | Mappa dei ritrovamenti | Introduzioni | Faunafri

Atlantic: off Alabama, USA and the Gulf of Mexico; including Brazil and West Sahara and off Azores. Northwest Pacific: off Okinawa, Japan and Australia (NSW). A very rare species (Ref. 52580).

Dimensione / Peso / Età

Maturità: Lm ?  range ? - ? cm
Max length : 42.3 cm TL (female)

Breve descrizione Chiavi di identificazione | Morfologia | Morfometria

Spine dorsali (totale) : 0. The largetooth cookiecutter shark Isistius plutodus has no collar marking around throat, a small asymmetrical caudal fin with a short ventral lobe less than half the length of dorsal caudal margin, bigger mouth and gigantic lower teeth (proportionately the largest in any living shark) in 19 rows (upper teeth = 29 rows). Eyes set well forward on head, with extensive anterior binocular field. Pectoral fins rounded, pelvic fins smaller than dorsal fins. As with the other member of the genus Isistius, it has a characteristic small cigar-shaped body with two small close-set spineless dorsal fins far posterior on back, no anal fin, huge, triangular-cusped teeth without blades, short, bulbous snout and a unique suctorial lips (Ref. 247).
Body shape (shape guide): elongated.

Biologia     Glossario (es. epibenthic)

A very rare species known only from few localities in epipelagic waters. Apparently feeds on small epibenthic and epipelagic invertebrates and fish. Its powerful jaws, big mouth and enormous lower teeth enable it to bite off large portion of its prey in one sweeping motion. A facultative ectoparasite evidenced by its suctorial lips and feeding apparatus. It has extremely short snout and anteriorly positioned eyes which allows for binocular vision (Ref. 247). Caught by mid-water trawl (Ref. 55584). Ovoviviparous (Ref. 205). Has large oily liver which helps it to become neutrally buoyant (`hepatic float').

Ciclo vitale e comportamento di accoppiamento Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve

Distinct pairing with embrace (Ref. 205).

Riferimento principale Caricare le referenze | Bibliografia | Coordinatore : Compagno, Leonard J.V. | Collaboratori

Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)

Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))

  Least Concern (LC) ; Date assessed: 15 May 2024

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Minaccia per l'uomo

  Harmless





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Informazioni ulteriori

Ecologia trofica
Articoli alimentari (prede)
Alimentazione
Consumo di cibo
Razioni alimentari
Predatori
Ecologia
Ecologia
Dinamica della popolazione
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Francobolli, monete, materiale vario.
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Fonti Internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Genere, Specie | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, ricerca | World Records Freshwater Fishing | Zoobank | Record zoologico

Stime basate su modelli

Indice di diversità filogenetica
(Fonte Biblio. 82804)
PD50 = 0.7510 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00263 (0.00140 - 0.00495), b=3.11 (2.93 - 3.29), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Livello trofico
(Fonte Biblio. 69278)
4.2   ±0.4 se; based on size and trophs of closest relatives
Resilienza
(Fonte Biblio. 120179)
Basso, tempo minimo di raddoppiamento della popolazione 4.5 - 14 anni (Fec assumed to be <100).
Vulnerabilità della pesca
(Ref. 59153)
Low to moderate vulnerability (32 of 100). 🛈