Eucrenonaspides

Eucrenonaspides oinotheke
Conservation status
	; Vulnerable (IUCN 2.3)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Crustacea
Class:	Malacostraca
Order:	Anaspidacea
Family:	Psammaspidae
Genus:	Eucrenonaspides; Knott & Lake, 1980
Species:	E. oinotheke
Binomial name
	Eucrenonaspides oinotheke; Knott & Lake, 1980

Eucrenonaspides oinotheke is a species of crustacean in the family Psammaspidae, endemic to Tasmania, the only species described in the genus Eucrenonaspides. The Eucrenonaspides is a variation of the Anaspidaceans. [2]It was described from a spring at 9 Payton Place, Devonport, Tasmania in 1980, making it "the first spring-dwelling syncarid recorded from the Australian region". It is listed as a vulnerable species on the IUCN Red List. A further undescribed species is known from south-western Tasmania.[3]

Description

The Eucrenonaspides oinotheke has its own unique structure that encompasses a head and thorax. These do not have a shieldlike carapace and the first thoracic segment is tightly joined with the head. They also have pairs of maxillipeds, and thoracic limbs associated with the mouth. The head of the Eucrenonaspides oinotheke is sub-rectangular and divided into two unequal regions by transverse mandibular grooves. Each side of the head is a mandibular groove which meet in the midline. These mandibular groove’s pass obliquely backward to a level near the posterior margin of the head and defines an inferior plate. [4]

References

World Conservation Monitoring Centre (1996). "Eucrenonaspides oinotheke". IUCN Red List of Threatened Species. 1996: e.T8164A12894255. doi:10.2305/IUCN.UK.1996.RLTS.T8164A12894255.en. Retrieved 15 November 2021.
Koenemann, Stefan (2001). "Class multicrustea: subclass Malacostraca". Evolution and Phylogeny of Pancrusteacea: A Story of scientific method. Section 4: 306–320 – via Oxford University Press.
W. F. Ponder; S. A. Clarke; S. Eberhard; J. B. Studdert (2005). "A radiation of hydrobiid snails in the caves and streams at Precipitous Bluff, southwest Tasmania, Australia (Mollusca: Caenogastropoda: Rissooidea: Hydrobiidae s.l.)" (PDF). Zootaxa. 1074: 1–66. doi:10.11646/zootaxa.1074.1.1. Archived from the original (PDF) on 15 March 2011. Retrieved 7 November 2010.
Brenton Knott; Philip S. Lake (1980). "Eucrenonaspides oinotheke gen. et sp. n. (Psammaspididae) from Tasmania, and a new taxonomic scheme for Anaspidacea (Crustacea, Syncarida)". Zoologica Scripta. 9 (1–4): 25–33. doi:10.1111/j.1463-6409.1980.tb00648.x. S2CID 85415086.

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[iucn_status_15_November_2021-1] World Conservation Monitoring Centre (1996). "Eucrenonaspides oinotheke". IUCN Red List of Threatened Species. 1996: e.T8164A12894255. doi:10.2305/IUCN.UK.1996.RLTS.T8164A12894255.en. Retrieved 15 November 2021.

[2] Koenemann, Stefan (2001). "Class multicrustea: subclass Malacostraca". Evolution and Phylogeny of Pancrusteacea: A Story of scientific method. Section 4: 306–320 – via Oxford University Press.

[3] W. F. Ponder; S. A. Clarke; S. Eberhard; J. B. Studdert (2005). "A radiation of hydrobiid snails in the caves and streams at Precipitous Bluff, southwest Tasmania, Australia (Mollusca: Caenogastropoda: Rissooidea: Hydrobiidae s.l.)" (PDF). Zootaxa. 1074: 1–66. doi:10.11646/zootaxa.1074.1.1. Archived from the original (PDF) on 15 March 2011. Retrieved 7 November 2010.

[4] Brenton Knott; Philip S. Lake (1980). "Eucrenonaspides oinotheke gen. et sp. n. (Psammaspididae) from Tasmania, and a new taxonomic scheme for Anaspidacea (Crustacea, Syncarida)". Zoologica Scripta. 9 (1–4): 25–33. doi:10.1111/j.1463-6409.1980.tb00648.x. S2CID 85415086.