Xenotrichula laccadivensis   Rao,  1991 (Gastrotrich)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Gastrotricha
Class:
Order:Chaetonotida
Family:Xenotrichulidae

Description
Size: Length 170-220 µm excluding the tail forks and maximum width 60-70 µm.

The body has a typical chaetonotoid appearance, with a distinct head, neck, trunk and caudal forks. The head is crescent-shaped on the anterior border. It bears 2 pairs of sensory bristles 20-25 µm long on the anterior margin and a pair of posteriorly directed tentacles measuring 20-25 µm long. Two pairs of dorsolateral sensory cirri measuring about 10 µm long occur in the neck region.

Dorsally 8 rows of scales occur on head, 6 rows on neck, 12 rows on trunk and 2-3 rows on tail forks. The mid-dorsal longitudinal row consists of about 35 scales. The scales are poorly developed on anterior, posterior and ventrolateral extremities. Pedunculated scales occur laterally on trunk. The scales are borne on 1-2 µm long peduncles. Ventral hypotrichous cirri of the same size characteristic of the family occur in 2 longitudinal rows, one on either side of the digestive tract. The mouth is terminal and 8 µm wide. The pharynx is about 65 µm long and occupies about 1/3 of the total gut length. The gut following pharynx is about 130 µm long and undifferentiated into a stomach and intestine. Anus is subterminal and opens on the ventral surface about 6 µm from posterior border.

Reproductive system consists of paired testis and ovary situated symmetrically on either side of the gut. The testes are club-shaped strands located posterior to the ova. Vasa differentia open anteriorly behind the pharyngeal region.


Synonym (s)

Common Name (s)
Economic Importance and Threats

Ecology
Habitat:  Sandy, Coastal

Biogeography


• Lakshadweep, Kavaratti (Lat: 10.55) (Long: 72.63) INDIA (Record: 17/02/1983, 19/02/1983) (Depth: 0.05 mts)
• Lakshadweep, Kavaratti INDIA

Literature Source(s)
  • Zoological Survey of India (Eds) (1991) Animal resources of India (Protozoa to Mammalia) ZSI 1-694 Available at - NCL, Pune
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Rao, GC (1991) Meiofauna State fauna series 2: Fauna of Lakshadweep ZSI, Calcutta 41-135 Available at - NIO, Goa
  • Priyalakshmi, G and Menon, NR (2008) Indian marine Gastrotricha Available at - http://www.gastrotricha.unimore.it/Indian-marine.pdf

Page last updated on:2010-11-22

Back to Search