Austrorossia australis

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Austrorossia australis
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Order: Sepiida
Family: Sepiolidae
Genus: Austrorossia
Species:
A. australis
Binomial name
Austrorossia australis
Berry, 1918

Austrorossia australis, often called the big bottom bobtail squid, is a species of bobtail squid in the family Sepiolidae. [1] This species lives in sandy and muddy environments [2] from 131 to 665 meters deep, in waters away from South Australia, New South Wales, Victoria, Tasmania, and Queensland. [3]

Bobtail squid An order cephalopod molluscs closely related to cuttlefish

Bobtail squid are a group of cephalopods closely related to cuttlefish. Bobtail squid tend to have a rounder mantle than cuttlefish and have no cuttlebone. They have eight suckered arms and two tentacles and are generally quite small.

Sepiolidae family of molluscs

Sepiolidae is a family of bobtail squid encompassing 15 genera in three or four subfamilies.

Contents

Description & spawning

Its coloring is pinkish to a purple brown coloring, the dorsal mantle isn't fused with the head, and it has fins that are wide and short, [2] and have of 3.4 cm for males, and 6.3 for females. [4] Female A. australis lay their eggs in small clusters and then leaves them unattended, and females could spawn for several times in a year. [2]

Egg organic vessel in which an embryo first begins to develop

The egg is the organic vessel containing the zygote in which an embryo develops until it can survive on its own, at which point the animal hatches. An egg results from fertilization of an egg cell. Most arthropods, vertebrates, and mollusks lay eggs, although some, such as scorpions, do not.

Conservation

Its only threat is its resourced being harvested, and have minor fishery interests, and it has no need for any conservation measures, and it has been placed as "Least Concern" by the IUCN Red List. [3]

Least-concern species IUCN conservation category

A least concern (LC) species is a species which has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation. They do not qualify as threatened, near threatened, or conservation dependent.

IUCN Red List Inventory of the global conservation status of biological species

The IUCN Red List of Threatened Species, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biological species. It uses a set of criteria to evaluate the extinction risk of thousands of species and subspecies. These criteria are relevant to all species and all regions of the world. With its strong scientific base, the IUCN Red List is recognized as the most authoritative guide to the status of biological diversity. A series of Regional Red Lists are produced by countries or organizations, which assess the risk of extinction to species within a political management unit.

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References

  1. "WoRMS - World Register of Marine Species - Austrorossia australis (Berry, 1918)". www.marinespecies.org. Retrieved 2019-04-03.
  2. 1 2 3 News, Opening Hours 9 30am-5 00pmMonday- SundayClosed Christmas Day Address 1 William StreetSydney NSW 2010 Australia Phone +61 2 9320 6000 www australianmuseum net au Copyright © 2019 The Australian Museum ABN 85 407 224 698 View Museum. "Big bottom bobtail squid". The Australian Museum. Retrieved 2019-04-03.
  3. 1 2 "The IUCN Red List of Threatened Species". IUCN Red List of Threatened Species. Retrieved 2019-04-03.
  4. "Austrorossia australis, big bottom bobtail squid". www.sealifebase.ca. Retrieved 2019-04-03.