Chromodoris sp. 7.

Order: NUDIBRANCHIA
Suborder: DORIDINA
Superfamily: EUDORIDOIDEA
Family: Chromodorididae

DISTRIBUTION

Known only from Marshall Islands.

PHOTO

UPPER: Approx 15mm long.
LOWER: pair by their prey sponge, 5, 7mm long.
Marshall Islands. PHOTO: Scott Johnson.

Note from Scott Johnson: Known only from Enewetak and Kwajalein in the Marshall Islands. It is orange red with a wide white margin. Both the anterior and posterior ends of the mantle have a rather narrow deep orange-red margin and equally narrow yellow submargin. The rhinophore lamellae and branchial pinnae are irregularly edged with white. Its radula makes it a typical Chromodoris, and it's one of the species whose egg masses always have an orange extra-capsular yolk body adjacent to each ovum.

See Scott Johnson's message below.

Authorship details
Rudman, W.B., 1999 (November 20) Chromodoris sp. 7. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/chrosp7

Related messages


Is this Chromodoris sp.7?

April 19, 2006
From: Yasuhiro Shamoto

Dear Dr.Rudman,
This Chromodoris species with a translucent mantle was found in Amami-Oshima Is.

Photo A, B: Amami-Oshima Is, Japan. 23 May 2006, Length: approx 15 mm. Depth: 2 m . Habitat: muddy sand. Water temperature:19 degrees. Photo: Yasuhiro Shamoto

Also, I have a photo of the same species from Cebu Is, photographed by my friend.

Photo C: Cebu Is, Philippines. 04 Feb 2003. Length:approx 12 mm. Depth: 12 m .Habitat: sand. Photographed: Cheki

I think both of these are same species as your Chromodoris sp.7.

Yours sincerely
Yasuhiro Shamoto

yasunao515@cyber.ocn.ne.jp

Yasuhiro Shamoto, 2006 (Apr 19) Is this Chromodoris sp.7?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/16364

Dear Yasu,
I agree that these animals look very like Scott Johnson's photo. In the upper photo there seems to be a suggestion of a red and yellow band around the mantle edge. It looks like this species is quite widespread.
Best wishes,
Bill Rudman

Rudman, W.B., 2006 (Apr 19). Comment on Is this Chromodoris sp.7? by Yasuhiro Shamoto. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/16364

Chromodoris from Marshall Ids

November 22, 1999
From: Scott Johnson


Hi Bill,

Here are a couple of shots of a Chromodoris species I have from both Enewetak and Kwajalein in the Marshall Islands. As you can see from the photo, it is orange red with a wide white margin. What is not so visible is that both the anterior and posterior ends of the mantle have a rather narrow deep orange red margin and equally narrow yellow submargin. The rhinophore lamellae and branchial pinnae are irregularly edged with white. Its radula makes it a typical Chromodoris, and it's one of the species whose egg masses always have an orange extra-capsular yolk body adjacent to each ovum. I've never been able to find a name for it. The single specimen is about 15mm long, and each of the pair by their prey sponge in the other picture is 5-7mm.

Scott.

johnson@kmr.ll.mit.edu

Johnson, S., 1999 (Nov 22) Chromodoris from Marshall Ids. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1562

Thanks Scott,

Your mention of extra capsular yolk made me wonder if you had any photos of eggs with and without egg extra capsular yolk and any other peculiarities. If more of us could actually see the differences in a photo, it might lead to more observations being reported.

Best wishes,
Bill Rudman.

Rudman, W.B., 1999 (Nov 22). Comment on Chromodoris from Marshall Ids by Scott Johnson. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1562