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ISCHNOCHITONIDAE


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Ischnochiton (Ischnochiton) examinandus Hull, 1923

Description: Animal ovate, shell moderately broad, girdle moderately broad. Median valves with lateral areas slightly raised, both lateral and pleural area smooth without magnification; with magnification, sculptured with curved lines of pustules. Girdle densely covered with very small ridged scales, about 0.11 mm wide. Valve colour variable, often mottled pink, sometimes with symmetrical black patches on both sides of valves.

Size: Up to 15 mm in length.

Distribution: Endemic to Australia. Known from Caloundra, Qld, southwards to Gabo Island, Vic.

Habitat: Found in the low intertidal under rocks, down to 20 m. Moderately common.

Comparison: See Ischnochiton (Ischnochiton) elongatus.

Fig. 1: Port Jackson, Sydney, NSW (C.365182).

Fig. 2: Colour variation. 1. C.130005 (HOLOTYPE) 2. C.365182 3. C.365182 4. C.156810.

Fig. 3: Sculpture detail. Same specimen as Fig. 1.

 

Copyright Des Beechey 2019