Idiosepius thailandicus

Idiosepius thailandicus is a species of bobtail squid native to the Indo-Pacific waters off Thailand.[2][3] 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.[1]

Idiosepius thailandicus
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Family: Idiosepiidae
Genus: Idiosepius
Species:
I. thailandicus
Binomial name
Idiosepius thailandicus
Chotiyaputta, Okutani & Chaitiamvong, 1991

Females grow to 10 mm in mantle length (ML), while males are not known to exceed 7 mm ML.[4]

The type specimen was collected in the Gulf of Thailand and is deposited at the Marine Fisheries Division in Bangkok.[5]

In the Gulf of Thailand off eastern Thailand Idiosepius thailandicus was recorded among seaweed in the littoral zone in Rayong Province and in a mangrove habitats in Chanthaburi Province. In mangrove habitats the squid adhered their eggs to the roots of the mangrove. In the Andaman Sea, ths species occurred in subtidal seagrass beds near the mouth of estuaries lined with mangroves and on sand bars which were interspersed with rocks. In these habitats the eggs were attached to the underside of blades of seagrasses. These squids and their relatives have a glue gland on their dorsal body surface that they use to adhere to submerged vegetation and other objects. Their life cycle is thought to include a juvenile pelagic stage.[1]

Idiosepius thailandicus is classified as Data Deficient by the IUCN as its exact distribution is unknown and no assessments have been made of its population size or population trends. The seagrass beds which form an important part of this species habitat are under threat and if, as may be the case, this species extends north to Japan then the seagrass beds there have been severely negatively impacted by human activities.[1]

References
  1. Barratt, I.; Allcock, L. (2012). "Idiosepius thailandicus". The IUCN Red List of Threatened Species. 2012: e.T162526A909581. doi:10.2305/IUCN.UK.2012-1.RLTS.T162526A909581.en. Downloaded on 09 February 2018.
  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. Chotiyaputta, C., T. Okutani & S. Chaitiamvong 1991. A new pygmy cuttlefish from the Gulf of Thailand Idiosepius thailandicus n. sp. (Cephalopoda: Idiosepiidae). Venus, the Japanese Journal of Malacology 50(3): 165-174.
  4. Okutani, T. 1995. Cuttlefish and squids of the world in color. Publication for the 30th anniversary of the foundation of the National Cooperative Association of Squid Processors.
  5. Current Classification of Recent Cephalopoda
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