Gollum attenuatus (Garrick, 1954)

Open encyclopedia reference

The slender smooth-hound or gollumshark (Gollum attenuatus) is a species of ground shark in the family Pseudotriakidae. It is endemic to the waters around New Zealand, where it is usually found close to the bottom over the continental slope at depths of 300–600 m (980–1,970 ft). An extremely slim, plain brownish shark reaching 1.1 m (3.6 ft) in length, the slender smooth-hound can be identified by its broad, flattened head with a long, distinctively bell-shaped snout. Its mouth is angular with short furrows at the corners, and contains a very high number of tooth rows in both jaws. Its two dorsal fins are roughly equal in size. The diet of the slender smooth-hound is diverse, but dominated by small, benthic bony fishes and decapod crustaceans. It exhibits a specialised form of aplacental viviparity with oophagy: the females produce a single capsule in each uterus that contains 30–80 ova, of which one ovum develops into an embryo that consumes the rest of the ova and stores the yolk material in its external yolk sac.

Wikipedia contributors, Slender smooth-hound; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T22:39:40.981148+00:00. This reference remains separate from the taxonomic record.

Identity & source status

Scientific name

Gollum attenuatus (Garrick, 1954)

Name authority

(Garrick, 1954)

Rank

species

Accepted status

accepted

Kingdom

Animalia

Phylum

Chordata

Class

Elasmobranchii

Order

Carcharhiniformes

Family

Pseudotriakidae

Genus

Gollum

Extinction status

Not supplied by this source

Source habitat flags: Marine: yes · Freshwater: no · Terrestrial: no. These do not form a complete habitat description.

Classification family tree

Nested taxonomic groups from the source. This is not a direct-ancestor chain, a dated evolutionary tree or a phylogenetic reconstruction.

1. domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
2. kingdomAnimalia
3. phylumChordata
4. subphylumVertebrata
5. infraphylumGnathostomata
6. parvphylumChondrichthyes
7. classElasmobranchii
8. subclassNeoselachii
9. infraclassSelachii
10. superorderGaleomorphi
11. orderCarcharhiniformes
12. familyPseudotriakidae Gill, 1893
13. genusGollum Compagno, 1973
14. speciesGollum attenuatus (Garrick, 1954)

Close classified relatives

These entries share the source’s genus, Gollum. They are not necessarily the closest relatives established by molecular evidence.

Browse 5 records assigned to Pseudotriakidae.

Names & synonyms

Names explicitly linked to this accepted taxon in the source. Synonymy can change with revision.

Source literature & publication evidence

References attached to this source record, including nomenclatural citations where supplied. This is a selected bibliography; abbreviated citations remain in the source’s form.

1. https://www.marinespecies.org/aphia.php?p=taxdetails&id=280912 Source fields: Taxon.tsv dwc:namePublishedIn, Taxon.tsv dcterms:references

Origins, evidence & remaining research

Name authority and publication references document nomenclature where the source supplies it. They do not establish evolutionary origins or the earliest fossil occurrence.

Specimen-level evidence, morphology, ecological research, phylogenetic studies, a comprehensive bibliography and a located literary passage have not yet been compiled for this record. A suitable sourced image remains to be added.

Dataset citation & attribution

This exact taxon in ChecklistBank · Catalogue of Life 2026-09-11

Catalogue of Life 2026-09-11; dataset 316321; doi:10.48580/dgz5n. https://creativecommons.org/licenses/by/4.0/ . Retrieved 5 October 2026.

Stable key: col:3GRVK. Classification follows source parent identifiers. English common names may vary by region.