Re: Thecacera pennigera - a new Mediterranean exotic

April 1, 2008
From: Gary McDonald

Concerning message #21472:

Dear Bill:

Using my cross index I found the following mentions of Thecacera pennigera in the Mediterranean. Apparently all of the recent references cite much older references, with none mentioning recently seeing the species in the Mediterranean.

Fredol, Alfred. 1865. Le monde de la mer. Paris, L. Hachette et cie, vii + 632 pp, 22 pls.
[2nd ed, 1866 available at: http://ia360640.us.archive.org/1/items/lemondedelamer00fr/lemondedelamer00fr.pdf]
[I assume this is the book referred to below by both Carus, 1889-1893, & Cattaneo-Vietti & Chemello. 1987. I can read very little French, so I am not sure if the Fredol book says that the animal figured occurs in the Mediterranean; but perhaps this is the source of all the early citations of T. pennigera, in the Mediterranean?

pl. xviii, figs. 3-4, Polycere: shows an animal that looks like Thecacera pennigera.


Ihering, H. v. 1886. Beiträge zur Kenntniss der Nudibranchien des Mittelmeeres. II. 4. Die Polyceraden. Malakozoologische blätter, Neue Følge 8:12-48, pls. 1-2.

on p. 14:
Hinter jeder art gieft die Bezeichnung med. oder atl. an, ob die art im mittelmeer oder im atlant. Ocean gefunden ist...
Thecacera pennigera Mont. med., atl.


Carus, Julius Victor. 1889-1893. Prodromus Faunae Mediterraneae sive descriptio animalium Maris Mediterranei incolarum quam comparata silva rerum quatenus innotuit adiectis locis et nominibus vulgaribus eorumque auctoribus in commondom Zoologorum, vol. II. Brachiostomata, Mollusca, Tunicata, Vertebrata, ix + 854 pp.

on p. 227:
Th. pennigera Flem. Habit.: Sicilia (Quatrefages, in Fredol).


Vayssière, A. J. B. M. 1913a. Mollusques de la France et des régions voisines, tome premier, amphineures, gasteropodes opisthobranches, heteropodes, marseniades et oncidiides. Encyclopedie Scientifique, publiee sous la direction du Dr. Toulouse, Bibliotheque de Zoologie Doin, Paris, pp. 1-420, I-XII, pls. 1-37.

on p. 339, under the genus Thecacera:

Coloration blanche avec nombreuses taches irregulieres oranges et aussi grand nombre de punctuations noires repandues sur tout le corps, moins la face inferieure du pied; rhinophores et branchie plus ou moins oranges, avec des punctuations noires.
Formule radulaire 3,2,0,2,3.
Longueur 13mm sur 2.6 a 3mm de largeur
pennigera, Flem, Montagu.
Habitat. - Mediterranee: Sicile; Ocean: Ile Brehat, Wimereux, cotes de l'Angleterre.


Cattaneo-Vietti, R., & Giorgio Barletta. 1984. Elenco preliminare dei molluschi opistobranchi viventi nel Mediterraneo (Sacoglossa, Pleurobranchomorpha, Acochlidiacea, Aplysiomorpha, Nudibranchia). Bollettino Malacologico (Pubblicazione Mensile Edita dalla Societa Italiana di Malacologia) 20(9-12):195-218.

on p. 208:
** - Thecacera pennigera (Montagu, 1815) [the two asterisks indicate: "specie osservati molto raramente"].


Cattaneo-Vietti, R., & Renato Chemello. 1987. Alcune considerazioni sui molluschi opistobranchi della Sicilia. Bollettino Malacologico (Pubblicazione Mensile Edita dalla Societa Italiana di Malacologia) 23(5-8):207-222.

on p. 216:
Thecacera pennigera (Montagu, 1815) (Doris)
- fide Carus, 1889-93 (sec. Quadrefages in Fredol)


Cattaneo-Vietti, R., & Thomas Everett Thompson. 1989. Mediterranean opisthobranch molluscs: a zoogeographic approach. Bollettino Malacologico (Pubblicazione Mensile Edita dalla Societa Italiana di Malacologia) 25(5-8):183-204.

on p. 200:
CT Thecacera pennigera (Montagu, 1815) [Doris]
[the CT indicates Circumtropical region]


Cattaneo-Vietti, R., R. Chemello, & Ricardo Giannuzzi-Savelli. 1990. Atlas of Mediterranean nudibranchs [Atlante dei nudibranchi del Mediterraneo], 264 pp., 14 pls. La Conchiglia, Rome.

on p. 21:
Thecacera pennigera is in the list of species but is not treated in the body of the work.

Hope this is a step toward clearing up the early citations of Thecacera pennigera in the Mediterranean.

Best,
Gary

mcduck@ucsc.edu

McDonald, G., 2008 (Apr 1) Re: Thecacera pennigera - a new Mediterranean exotic. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21483

Thanks Gary,

Best wishes,
Bill Rudman

Factsheet

Thecacera pennigera

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