Information on Siphopteron

July 26, 1999
From: Erwin Koehler

Dear Bill,
can you tell me the authority of the genus "Siphopteron" - I've searched the web and used Steve Long's "bibliographic citations search enigine"
at - no result.


Koehler, E., 1999 (Jul 26) Information on Siphopteron. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Erwin,
Terry Gosliner proposed the genus in a review of the family Gastropteridae in 1989, to distinguish a group of species which had previously been placed in the genus Gastropteron. Like Gastropteron they have up to 6 outer lateral teeth, but unlike Gastropteron they have a modified penis with a spermatic bulb. The only external character seems to be the presence of a ridge along the siphon which usually extends as a prominent tapering rod at the tip of the siphon. I can't see this feature clearly in either Siphopteron sp. 1. or Siphopteron sp. 2.

Reference: Gosliner. T.M. (1989) Revision of the Gastropteridae (Opisthobranchia: Cephalaspidea) with descriptions of a new genus and six new species. The Veliger, 32(4): 333-381.

Bill Rudman.

Rudman, W.B., 1999 (Jul 26). Comment on Information on Siphopteron by Erwin Koehler. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Siphopteron sp. 1.

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    From: Atsushi Ono, December 21, 1999
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    From: Bob Bolland, July 27, 1999
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