Cucumerunio websteri

Cucumerunio websteri is a species of freshwater mussel, an aquatic bivalve mollusc in the family Hyriidae.

Cucumerunio websteri
Drawing of the right valve of Cucumerunio websteri
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Order: Unionida
Family: Hyriidae
Genus: Cucumerunio
Species:
C. websteri
Binomial name
Cucumerunio websteri
(Simpson, 1902)[1]
Synonyms
  • Diplodon websteri Simpson, 1902
  • Diplodon (Hyridella sec. Cucumaria) websteri Simpson, 1902[2]
  • Hyridella (s.s.) aucklandica websteri (Gray in Dieffenbach, 1843)[3]

Subspecies
Drawing of the hinge of Cucumerunio websteri.

Description
Drawing of the detail of valves from the top of Cucumerunio websteri.

The specific name websteri is in honor of Reverend William Henry Webster (died 1931) of Wauiku, New Zealand, who have sent specimens to the National Museum of Natural History.[1] Cucumerunio websteri then was described under the name Diplodon websteri by American malacologist Charles Torrey Simpson in 1902.[1]

Simpson's original text (the type description) reads as follows:

Diplodon websteri Simpson.

Shell long, rhomboid, compressed or subcompressed, inequilateral; beaks subcompressed, pointed, their sculpture apparently a few irregular lachrymose nodules arranged in a somewhat radial pattern; surface with uneven growth lines and impressed rest marks, sculptured throughout with lachrymose nodules which are often V-shaped, those along the upper part of the low posterior ridge slightly knobbed; epidermis dark olive green, clouded with lighter green, rather dull; pseudo-cardinals small, subcompressed, granulose, two in each valve ; laterals straight, two in the left valve, one in the right; muscle scars small, shallow and irregular; nacre bluish,

lurid purple near and in the beak cavities, thicker in front.

The length of the shell is 62–81 mm. The height of the shell is 32–39 mm. The width of the shell is 14–20 mm.[1][4]

Distribution

It lives in the North Island, New Zealand. The type locality is New Zealand, but the exact type locality is unknown.[1]

Habitat

It inhabits lakes and streams.[4]

References

This article incorporates public domain text from reference.[1]

  1. Simpson C. T. (1902) "A new naiad from New Zealand". Nautilus 16(3): 30.
  2. Simpson C. T. (1914). A descriptive catalogue of the naiades, or pearly fresh-water mussels. Parts I-III. Bryant Walker, Detroit, Michigan xii + 1540 pp. Pages 1307-1308.
  3. Haas F. (1969) page 503.
  4. Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1

Further reading
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