Cranchiinae
Richard E. Young
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close boxIntroduction
This is a much less diverse subfamily than the Taoniinae.
Brief diagnosis:
A cranchiid ...
- with many small, round photophores on eyeball.
- with cartilagenous tubercules dispersed and/or in strips on mantle.
Characteristics
- Arms
- Hectocotylus left or right arm IV.
- Arms III longest.
- Head
- Eyes stalked only in young Leachia, otherwise eyes sessile.Click on an image to view larger version & data in a new window
Figure. Sessile yes of paralarval Liocranchia reinhardti (left. 7.7 mm ML), and stalked eyes of paralarval Leachia pacifica (right, 7.9 mm ML). Drawings by R. Young.
- Eyes stalked only in young Leachia, otherwise eyes sessile.
- Funnel
- Funnel fused to head laterally.
- Funnel fused to head laterally.
- Mantle
- One or two cartilagenous strips, usually with tubercles, extend posteriorly from each point of funnel-mantle fusion.
- One or two cartilagenous strips, usually with tubercles, extend posteriorly from each point of funnel-mantle fusion.
- Photophores
- Eyes with four or more small round photophores.Click on an image to view larger version & data in a new window
Figure. Ventral view of an eye of L. reinhardti showing 11 of its 14 ocular photophores, Hawiian waters. Photograph by R. E. Young.
- Eyes with four or more small round photophores.
- Viscera
- Caecum larger than stomach.
Comparison of Cranchiinae genera
| Cartilagenous tubercules | Stalked eyes in paralarvae | Funnel valve | Suckers in medial two series on club manus | |
| Cranchia | cover mantle | No | Yes | Not enlarged |
| Leachia | on single cartilagenous strips | Yes | No | Enlarged |
| Liocranchia | on double, diverging cartilagenous strips | No | Yes | Not enlarged |
References
Voss, N. A. 1980. A generic revision of the Cranchiidae (Cephalopoda; Oegopsida). Bull. Mar. Sci. 30: 365-412.
Title Illustrations
| Scientific Name | Cranchia scabra |
|---|---|
| Location | Sea of Japan |
| Specimen Condition | Live Specimen |
| View | Side |
| Size | about 10 cm ML |
| Copyright |
© Danté Fenolio
|
About This Page
University of Hawaii, Honolulu, HI, USA
Correspondence regarding this page should be directed to Richard E. Young at
Page copyright © 2019
Page: Tree of Life
Cranchiinae .
Authored by
Richard E. Young.
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- First online 17 September 2004
- Content changed 27 February 2016
Citing this page:
Young, Richard E. 2016. Cranchiinae . Version 27 February 2016 (under construction). http://tolweb.org/Cranchiinae/19540/2016.02.27 in The Tree of Life Web Project, http://tolweb.org/
