Euprymna
Richard E. Young and Michael Vecchione
- Euprymna albatrossae
- Euprymna berryi
- Euprymna hoylei
- Euprymna hyllebergi
- Euprymna morsei
- Euprymna penares?
- Euprymna phenax
- Euprymna scolopes
- Euprymna stenodactyla
- Euprymna tasmanica
Introduction
Species of Euprymna are small (up to a few cm in ML), benthic sepiolids sometimes found in water less than 1 m in depth.Diagnosis
A sepiolin ...
- with visceral photophores.
- with, usually, four sucker series on arms.
Characteristics
- Arms
- Arm suckers usually in four series; in two series in E. phenax.
- Hectocotylus - left arm I; also enlargement of suckers of marginal series of some other arms. Click on an image to view larger version & data in a new window
Figure. Oral view of partial arm crown with both arms I and left arms I-IV. Left - E. phenax, male, 11 mm ML, holotype. Right - E. albatrossae, male, 24 mm ML. Both species from Philippine waters. Drawings from Voss (1963).
- Arms III not unusually thick and robust; rarely curled inward in preservation when other arms are not.
- Tentacles
- Tentacular clubs with suckers in more than 32 series. Click on an image to view larger version & data in a new window
Figure. Dorsal views of the two species shown above (left - E. phenax, right - E. albatrossae). Note the shape of the clubs and the presence of keels (typical Sepiolinae feature). Drawings from Voss (1963).
- Photophores.
- Pair of bean-shaped visceral photophores.
Click on an image to view larger version & data in a new window
Figure. Ventral view of the visceral photophores of E. scolopes. The silvery reflectors are covered in their centers by extensions of the ink sac. The photogenic region of each reflector is medially located and the two organs are joined by a narrow duct. Photograph by R. Young.
- Gladius
- Gladius present as a distinct rudiment
References
Nesis, K. N. 1982/87. Abridged key to the cephalopod mollusks of the world's ocean. 385+ii pp. Light and Food Industry Publishing House, Moscow. (In Russian.). Translated into English by B. S. Levitov, ed. by L. A. Burgess (1987), Cephalopods of the world. T. F. H. Publications, Neptune City, NJ, 351pp.
Voss, G. L. 1963. Cephalopoda of the Philippine Islands. Bull. U. S. Nat. Mus., 234: 1-180.
Title Illustrations
| Scientific Name | Euprymna tasmanica |
|---|---|
| Location | off Australia |
| Copyright | © 1996 Mark Norman |
About This Page
University of Hawaii, Honolulu, HI, USA
National Museum of Natural History, Washington, D. C. , USA
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Euprymna .
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Young, Richard E. and Michael Vecchione. 1996. Euprymna . Version 01 January 1996 (under construction). http://tolweb.org/Euprymna/20036/1996.01.01 in The Tree of Life Web Project, http://tolweb.org/
