The neodermis of the whole early rostellum of Silurotaenia siluri (Batsch, 1786) bears filamentous microtriches. At the base, there are five to six irregular rows of hooks and spine-like microtriches. The rostellar hooks of S. siluri originate through the enlargement of microtriches. Electron-dense hook substance is deposited along the edges of the microthrix to form the hook blade and basal plate. The blade does not become hollow as in the cyclophyllidean cestodes. The basal plate of the hook, corresponding to the handle and the guard of Cyclophyllidea, is formed by the deposition of hook substance around the base of the microthrix. Within the centre of the base, only a narrow cleft-like core is occupied by distal cytoplasm. The hook bases are more deeply inserted into the distal cytoplasm, as the bases of the spine-like microtriches are localized on the rostellum below the rows of hooks. No hemidesmosomes, fixing the hook base to the basal lamina, are present. Eccrine gland cells and uniciliate and nonciliate sensory receptors of the primitive rostellum are described.

Institute of Parasitology Academy of Sciences of the Czech Republic Branisovská 31 370 05 Ceské Budejovice Czech Republic

See more in PubMed

Z Parasitenkd. 1975 Jun 27;46(3):229-39 PubMed

Z Parasitenkd. 1980;63(1):71-88 PubMed

J Parasitol. 1997 Dec;83(6):1128-47 PubMed

Mol Phylogenet Evol. 2001 Jun;19(3):443-67 PubMed

Int J Parasitol. 1973 Jul;3(4):561-70 PubMed

Parasitol Res. 2000 Feb;86(2):89-95 PubMed

Folia Parasitol (Praha). 1976;23(2):131-4 PubMed

Can J Zool. 1969 Mar;47(2):251-61 PubMed

Z Parasitenkd. 1980;64(1):95-111 PubMed

Parasitol Res. 1999 Jan;85(1):1-6 PubMed

Parasitology. 1964 Aug;54:515-26 PubMed

Jpn J Vet Res. 1969 Sep;17(3):67-80 PubMed

J Parasitol. 1970 Oct;56(5):947-61 PubMed

Int J Parasitol. 1971 Sep;1(2):169-77 PubMed

Int J Parasitol. 1998 Apr;28(4):667-77 PubMed

Transmission electron microscopy of the scolex and neck microtriches of Silurotaenia siluri (Batsch, 1786) (Cestoda: Proteocephalidea)