Helobdella viridoclypus

External morphology

Rice-shaped, transparent body; cephalisation; apair of large, distinctly separated, dark eyes on somite III;anterior sucker twice as large as prostomium without pits inside; central mouth in anterior sucker; triangular nuchalscute pointed backward with yellowish-green colouring around mid-dorsal region (VIIa1–a3, annuli 11–13); smooth surface without dorsal papillae; rich dark-green pigmentationon dorsum, particularly around crop caeca; lesser or almost absent pigmentation along crop; one male gonopore onXIIa1/XIIa2 (annuli 26/27); one female gonopore on XIIa2/a3 (annuli 27/28), maximum body width wider than anterior and posterior suckers by four and two times, respectively

Internal morphology

six pairs of crop caeca with unbranched posterior caeca

Habitat & range

Habitat

Freshwater

Region

Asia

Recorded from

Thailand

Biology

in Chiang Mai