cephalic shield

318 Sid STAUBACH & Annette KLUSSMANN-KOLB: Cephalic sensory organ in Aceton
RUDMAN, W.B. 1972b. Studies on the primitive opisthobranch
genera Bullina Fèrussac and Micromelo Pilsbry. Zoological
Journal of the Linnean Society 51: 105–119.
RU D M A N, W. B. 1972c. A study of the anatomy of P u p a and M a x -
a c t e o n (Acteonidae, Opisthobranchia), with an account of the
breeding cycle of Pupa kirki. Journal of Natural History 6:
603–619.
SCHMEKEL, L. 1985. Aspects of evolution within the opisthobranchs.
Pp. 221–267 in: TRUEMAN, E.R. & CLARKE, M.R.
(eds.) The Mollusca. Vol. 1 0 Evolution. Academic Press, London.
STAUBACH, S.E., SCHÜTZNER, P., CROLL, R.P. & KLUSSMANN-
KOLB, A.Innervation patterns of the cerebral nerves in Hami -
noea hydatis (Linnaeus 1758) (Gastropoda, Opisthobranchia)
– A test for intraspecific variability. In press, Zoomorphology
(2007).
VAY S S I È R E, A . 1980. Recherches anatomiques sur les Mollusques
de la famille des Bullidés Annales des Sciences Naturelle Zoologie
6: 9.
VO N N E M A N N, V., SC H R Ö D L, M., KL U S S M A N N- KO L B, A. &
WÄGELE, H. 2005. Reconstruction of the phylogeny of the
Opisthobranchia (Mollusca, Gastropoda) by means of 18S and
28S rDNA sequences. Journal of Molluscan Studies 71:
113–125.
YO N O W, N. 1989. Feeding observations on Acteon tornatilis ( L i n-
naeus) (Opisthobranchia, Acteonoidae). Journal of Molluscan
Studies 55(1): 97–102.
Author´s adresses: Sid STA U B A C H (corresponding author)
and Annette KL U S S M A N N- KO L B, Institute for Ecology, Evolution
and Diversity – Phylogeny and Systematics, J. W.
G o e t h e - U n i v e r s i t y, Siesmayerstraße 70, 60054, Frankfurt
am Main, Germany. E-mail: Staubach@bio.unifrankfurt.de;
Klussmann-Kolb@bio.uni-frankfurt.de.