Monoposthia costata   (Bastian,  1865) (Marine Worm)
Organism information awaits expert curation
Class: Adenophorea

Size: 1.6 – 1.8 mm. Tail 4.2 anal diameters long.

Cuticular annules distinct and interrupted by 12 longitudinal rows of V-shaped crests. Buccal cavity deep and conical. One large dorsal tooth and two small subventral teeth present. Dorsal buccal tooth opposed by smallventral projections. Six labial and 6 cephalic papillae distinct. Cephalic setae 0.8 head diameter long. Amphid small, circular, occurs between third and fourth annules and 0.12 head diameter wide. Spicule obscure. Gubernaculum epsilon-like; hooked distally and swollen in the middle. Tail tapers posteriorly ending in a cone. One preanal and two postanal ventromedian papillae present. Oesophagus with an anterior swelling around the buccal cavity and an elongated posterior bulb.

Synonym (s)
Spilophora costata Bastian, 1865
Monoposthia chilensis Steiner, 1921
Monoposthia constricta Ditlevsen, 1918
Monoposthia costata mediterranea Schulz, 1935
Monoposthia loricata Kreis, 1929
Monoposthia mediterranea Stekhoven, 1950
Monoposthia minor Schulz, 1932
Monoposthia similis Schulz, 1932
Monoposthia spiculata Cobb, 1930
Spiliphera costata Bastian, 1865

Common Name (s)
Economic Importance and Threats

Habitat:  Sandy, Coastal


• Andhra Pradesh, Vishakhapatnam (Lat: 17.7) (Long: 83.3) INDIA
• Bay of Bengal (Lat: 15) (Long: 90) INDIA
• Lakshadweep, Kavaratti INDIA (Record: 03/02/1987)
• Andaman and Nicobar Islands, Campbell Bay (Lat: 6.75) (Long: 93.63) INDIA
• Andaman and Nicobar Islands, Campbell Bay (Lat: 7.25) (Long: 93.93) INDIA
• Andaman and Nicobar Islands, Sound Island INDIA

Literature Source(s)
  • Rao, DVS (2005) Comprehensive review of the records of the biota of the Indian Seas and the introduction of non-indigenous species Aquatic Conservation: Marine and Freshwater Ecosystems John Wiley and Sons, Ltd. 15(2) 117-146 Available at -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Rao, GC (1991) Meiofauna State fauna series 2: Fauna of Lakshadweep ZSI, Calcutta 41-135 Available at - NIO, Goa
  • Rao, GC (1988) Meiofauna of the intertidal sediments on Great Nicobar Journal of the Andaman Science Association Andaman Science Association, Port Blair 4 (2) 89-100 Available at - NIO, Goa
  • Rao, GC (1989) On some free living marine nematodes of the Bay Islands Journal of the Andaman Science Association Andaman Science Association, Port Blair 5(1) 1-22 Available at - NIO, Goa
  • Platt, HM and Warwick, RM (1988) Free living marine nematodes part II British chromadorids Linnean society of London and the estuarine and brackish-water sciences association 38 502 pp Available at - NIO, Goa

Page last updated on:2011-08-19

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