Pseudallacanthochasmus grandispinis   Velasquez,  1961 (Marine Worm)
Organism information awaits expert curation
Class: Trematoda

Size: Length: 1.28-1.68 mm.
Width: 0.32-0.43.

Body elongate. Eyespot pigments present near pharynx. Tegument spinose. Ventral sucker 0.06-0.07 mm long, 0.04-0.07 mm wide, pre-equatorial, sunken in body parenchyma at 0.30-0.32 mm from anterior end of body. Oral sucker 0.15-0.16 mm long, 0.13-0.18 mm wide, bowl-shaped, larger than ventral sucker, sucker ratio-1: 0.38. Circumoral spines 26-28, in a single circle.

Prepharynx 0.020-0.024 mm long; pharynx muscular, 0.05-0.07 mm long, 0.04-0.06 mm wide; oesophagus 0.04-0.05 mm long; intestinal caeca extending upto posterior end of body.
Excretory vesicle 'Y' shaped.
Testes two, tandem, anterior testis 0.13-0.21 mm long, 0.13-0.21 mm wide, posterior testis 0.13-0.21 mm long, 0.13-0.26 mm wide, seminal vesicle cylindrical; pars prostatica small surrounded by prostate gland cells; hermaphroditic duct opens anterior to acetabulum in short vertical wall formed by acetabular depression in body parenchyma.
Ovary 0.12-0.16 mm long, 0.10-0.26 mm wide, multilobed, pretesticular. Receptaculum seminis present near ovary. Laurer's canal present. Uterus mostly on hind body. Eggs 12-20 µm x 8-12 µm.

Synonym (s)

Common Name (s)
Economic Importance and Threats



• Orissa, Chilika Lake INDIA
• Kerala, Kochi 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:2010-10-08

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