Monorchis minutus   Madhavi,  1977 (Marine Worm)
Organism information awaits expert curation
Class: Trematoda

Size: Length: 0.06-0.78 mm.
Width: 0.32-0.36 mm.

Body small. Tegument spinose. Ventral sucker 0.06-0.08 mm in diameter. Oral sucker 0.10-0.11 mm long, 0.12-0.14 mm wide, larger than ventral sucker. Sucker ratio- 1:1.6.

Prepharynx present; pharynx 0.07-0.08 mm long 0.09-0.10 wide, caeca long, wide terminating upto posterior end of body. Testis single, 0.12-0.17 mm long; 0.09-0.11 mm wide, situated on left side of body. Cirrus sac long, extending posterior to acetabulum, enclosing oval seminal vesicle, long pars prostatica surrounded by prostate gland cells and cirrus, armed with spines. Genital atrium small, without spines. Genital pore median, preacetabular.
Ovary single, ovate, 0.10-0.13 mm long, 0.07-0.08 mm wide, pretesticular; vitellaria follicular, forming a bunch on each side of body.
Terminal organ bipartite, anterior part armed and thick walled; uterus joining laterally at the anterior part. Eggs 16-20 µm x 8-12 µm.
Excretory bladder 'I' shaped reaching near acetabulum.

Synonym (s)

Common Name (s)
Economic Importance and Threats



• Orissa, Rambha INDIA
• Andhra Pradesh, Waltair INDIA
• Orissa, Chilika Lake INDIA

Literature Source(s)
  • Dutta, IB (1995) Platyhelminthes: Trematoda: Digenea Wetland ecosystem series 1: Fauna of Chilka lake ZSI, Calcutta 235-277 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -

Page last updated on:2010-10-07

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