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A new record from East Malaysia Sphaerolaimus macrocirculus (Nematoda)

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General Information
Title
A new record from East Malaysia Sphaerolaimus macrocirculus (Nematoda)
Type
Article
Main Author
Mohd Rosli Norliana, Mohd Long Shabdin, Cheng Ann Chen,
Subject
QH Natural history
Language Code
eng
Bibliographic Details
Place of Production
N/A
Year of publication
2013
Degree Type
Not related

Abstract

A new record of Sphaerolaimus macrocirculus (Filipjev 1918) in East Malaysian coastal water was described. The species was isolated from the muddy area of Muara Tebas, Sarawak, Malaysia. A total of 47 species of Sphaerolaimus have been reported worldwide. Samples of Sphaerolaimus macrocirculus were previously recorded in the sublittoral mud area of temperate country. S. macrocirculus possesses a stout body (1.1 – 1.6 mm; De Man ratios: a (body length/body width) = 16.8 – 27.5; b (body length/oesophagus length) = 2.3 – 4.3; c (body length/tail length) = 5.6 – 8.6). The circular amphid is very clear and situated at the base of the cephalic capsule. In male, the amphid ranged from 11.3 – 14.3 μm in diameter (mean = 12.7 ± 1.3) and 0.4 c.d. (corresponding diameter). In female, the amphid ranged from 7.2 – 9.4 μm in diameter (mean 7.8 ± 0.9) and 0.2 c.d. The species is characterised by the presence of eight groups of subcephalic setae at the head region and three longer terminal setae.

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