Idiosepius pygmaeus

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Idiosepius pygmaeus
Idiosepius pygmaeus.png
Hatchlings of Idiosepius pygmaeus (ca. 2 mm long) stained with phosphotungstic acid (left) and Lugol's iodine (right)
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Family: Idiosepiidae
Genus: Idiosepius
Species:
I. pygmaeus
Binomial name
Idiosepius pygmaeus
Steenstrup, 1881

Idiosepius pygmaeus, also known as the two-toned pygmy squid, is a species of bobtail squid native to the Indo-Pacific. It occurs in waters of the South China Sea, Japan, Philippines, Palau, Indonesia, Northern Mariana Islands, as well as northern and northeastern Australia. It inhabits shallow, inshore waters. [2] [3]

Contents

I. pygmaeus weighs 0.00033 g upon hatching and increases in weight to 0.175 g as it reaches maturity in 50 days (1260 degree days). It inhabits waters at a temperature of 25.2 °C. Growth rate has been calculated as 12.55 and physiological growth rate as 0.498. [4]

I. pygmaeus grows to 20 mm in mantle length. [2]

This species has been reared on a diet of glass shrimp ( Acetes sibogae australis ) in the laboratory. [5]

The type specimen was collected in the South China Sea ( 04°20′N107°20′E / 4.333°N 107.333°E / 4.333; 107.333 ) and is deposited at the Zoologisk Museum of Kobenhavns Universitet in Copenhagen. [6]

Related Research Articles

<i>Idiosepius</i> Genus of molluscs

Idiosepius is a genus of mollusk in the family Idiosepiidae. Members of this genus represent no interest to commercial fisheries.

<i>Rossia glaucopis</i> Species of mollusc

Rossia glaucopis is a species of bobtail squid native to the southeastern Pacific Ocean, specifically the waters around Chile.

<i>Austrorossia mastigophora</i> Species of mollusc

Austrorossia mastigophora is a species of bobtail squid native to western, southern and eastern Africa, from Guinea and Somalia to the Cape of Good Hope. A doubtful record of this species exists from Chile. It lives at depths to approximately 640 m.

Sepiola steenstrupiana, also known as Steenstrup's bobtail, is a species of bobtail squid native to the Gulf of Aden in the Red Sea, waters off Somalia, and the Mediterranean Sea, including the central Tyrrhenian Sea, the Adriatic Sea, the Aegean Sea, and the Levantine Sea.

Euprymna hoylei is a species of bobtail squid native to the tropical waters of the Indo-Pacific, specifically the western Pacific Ocean and northwestern Australia. Little is known about the size range of this species.

Euprymna penares is a species of bobtail squid native to waters of the Indo-Pacific; its exact distribution is unknown. Little is known about the size range of this species.

Euprymna phenax is a species of bobtail squid native to the waters of the Indo-Pacific, off the Philippines and possibly in the East China Sea. The depth range of this species is unknown. It was originally collected at nightlight.

Sepietta petersi, also known as the Mysterious Bobtail, is a species of bobtail squid native to the Mediterranean Sea. A doubtful record of S. petersi also exists from the Atlantic Ocean off Morocco.

Inioteuthis capensis is a species of bobtail squid native to the southeastern Atlantic Ocean, specifically from Lüderitz Bay to Mossel Bay off South Africa.

Inioteuthis japonica is a species of bobtail squid native to the western Pacific Ocean, specifically the waters off China, Taiwan, and southern Japan.

Rossia bullisi, also known as the Gulf bobtail squid, is a species of bobtail squid native to the tropical western Atlantic Ocean, specifically the northern Gulf of Mexico and Straits of Florida.

Rossia moelleri is a species of bobtail squid native to the northern Atlantic Ocean and the Arctic Ocean, eastward to the Laptev Sea and westward to Amundsen Bay. It occurs off western and northeastern Greenland, northeastern Canada, Labrador, Spitsbergen, Jan Mayen, and in the Kara Sea. R. moelleri lives at depths from 17 to 250 m.

Rossia pacifica diegensis is a subspecies of bobtail squid native to the eastern Pacific Ocean off Santa Catalina Basin, California. It occurs at greater depths than its sister taxon R. p. pacifica.

Heteroteuthis weberi is a species of bobtail squid native to the Indo-Pacific waters off central Indonesia.

Idiosepius minimus is a species of bobtail squid native to the "coast of Africa" where it occurs in shallow, inshore waters. Specimens collected under the junior synonyms I. biserialis and I. macrocheir were described from Mozambique. Since the further collecting effort off Mozambique has seen additional specimens gained. As a result it has been inferred that this species has a relatively restricted distribution since Idiosepius has not been recorded elsewhere in Africa.

Idiosepius picteti is a species of bobtail squid native to the Indo-Pacific waters off eastern Indonesia.

Idiosepius thailandicus is a species of bobtail squid native to the Indo-Pacific waters off Thailand. The extent of this species' distribution is still to be determined and records of Idiosepius dwarf squid away from Thailand, south to Indonesia and north to Japan, may be attributable to this species.

Xipholeptos notoides, commonly known as the southern pygmy squid, is the sole species in the cephalopod genus Xipholeptos. The species was originally classified as Idiosepius notoides. The southern pygmy squid is native to the southwestern Pacific Ocean, off southern and eastern Australia. It inhabits shallow, inshore waters. It has been recorded off the coasts of New South Wales, South Australia, Tasmania and Victoria.

<i>Idiosepius paradoxus</i> Species of mollusc

Idiosepius paradoxus, also known as the northern pygmy squid, is a species of bobtail squid native to the western Pacific Ocean, including the waters off South Korea, northern Australia, as well as the Japanese islands of Honshū, Kyūshū, and southern Hokkaidō. It inhabits shallow, inshore waters.

<i>Neorossia caroli</i> Species of mollusc

Neorossia caroli, the Carol bobtail squid, is a species of bobtail squid belonging to the family Sepiolidae.

References

  1. ↑ Barratt, I.; Allcock, L. (2012). "Idiosepius pygmaeus". The IUCN Red List of Threatened Species . 2012: e.T162604A926579. doi:10.2305/IUCN.UK.2012-1.RLTS.T162604A926579.en. Downloaded on 09 February 2018.
  2. 1 2 Reid, A. 2005. Family Idiosepiidae. In: P. Jereb & C.F.E. Roper, eds. Cephalopods of the world. An annotated and illustrated catalogue of species known to date. Volume 1. Chambered nautiluses and sepioids (Nautilidae, Sepiidae, Sepiolidae, Sepiadariidae, Idiosepiidae and Spirulidae). FAO Species Catalogue for Fishery Purposes. No. 4, Vol. 1. Rome, FAO. pp. 208–210.
  3. ↑ "Countries' Exclusive Economic Zones with Idiosepius pygmaeus". Archived from the original on 2003-05-23. Retrieved 2007-02-26.
  4. ↑ Wood, J.B. & R.K. O'Dor 2000. "Do larger cephalopods live longer? Effects of temperature and phylogeny on interspecific comparisons of age and size at maturity" (PDF). Archived from the original (PDF) on 2004-12-14. (134  KiB)Marine Biology136(1): 91–99.
  5. ↑ Jackson, G.D. 1988. The Use of Statolith Microstructures to Analyze Life-history Events in the Small Tropical Cephalopod Idiosepius pygmaeus. Fishery Bulletin (U.S.) 87: 265-272.
  6. ↑ Current Classification of Recent Cephalopoda

Further reading


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