Re: Protaeolidiella atra from Sagami Bay

September 19, 2001
From: Nishina Masayoshi

Dear Dr.Rudman,
Concerning your question - "Have you seen any animals with a white line down the centre of their back?"
I've never seen Protaeolidiella atra with with a white line down the center of their back here. I believe that P. atra in Japan has no white line. I found a photo of an animal [Ono, 1999] which looks like Protaeolidiella atra but it is called Protaeolidiella juliae Burn, 1966. P. juliae looks very much like P. atra but it has a white line down the centre of their back.
Best Regards,
Nishina Masayoshi

nishina@hpe15.wips.co.jp

Nishina, M., 2001 (Sep 19) Re: Protaeolidiella atra from Sagami Bay. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5055

Dear Nishina,
The reason I asked is that some years ago I decided P. atra and P. juliae were the same species (Rudman, 1990), the only difference being the white line in P. atra. It seems that both colour forms occur in Japan so I thought it would be interesting if anyone could find whether the white-striped form and the non striped animals were found together on the same hydroids, or whether they live on different species of hydroids. I discussed this matter in an earlier message from Yasuhiro Shirai.

It is one of those cases, like some species of Dendrodoris, where animals look different but there doesn't seem to be any anatomical differences.

Best wishes,
Bill Rudman

Rudman, W.B., 2001 (Sep 19). Comment on Re: Protaeolidiella atra from Sagami Bay by Nishina Masayoshi. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5055

Factsheet

Protaeolidiella atra

Related messages

  1. Protaeolidiella sp. from Sth Korea
    From: Dong Bum, Koh, March 24, 2003
  2. Another Protaeolidiella atra from Korea
    From: Dong Bum, Koh, October 30, 2002
  3. More questions about Protaeolidiella atra
    From: Dong Bum, Koh, October 18, 2002
  4. Protaeolidiella sp. from Korea
    From: Dong Bum,Koh, October 11, 2002
  5. Protaeolidiella sp. from Korea (2)
    From: Dong Bum,Koh., October 11, 2002
  6. Japanese Protaeolidiella atra (without a stripe)
    From: Yasuhiro Shirai, September 23, 2001
  7. Japanese Protaeolidia juliae? (with a stripe)
    From: Yasuhiro Shirai, September 23, 2001
  8. Protaeolidiella atra from Sagami Bay, Japan
    From: Nishina Masayoshi, August 7, 2001
  9. Protaeolidiella atra from Japan
    From: Yasuhiro Shirai, November 4, 1999
  10. Protaeolidiella atra from Indonesia
    From: Lindsay Warren, April 1, 1999

Show factsheet and all related messages