Dollfusiella qeshmiensis n. sp. (Cestoda: Trypanorhyncha) from the cowtail stingray Pastinachus sephen (Forsska°l) in the Persian Gulf, with a key to the species of Dollfusiella Campbell & Beveridge, 1994

Autor: Haseli, M.; Palm, Harry W. 2015
In:

Systematic Parasitology

Auflage: 92
ISBN: 1573-5192
DOI: 10.1007/s11230-015-9592-x
Seite: 161 - 169
Jahr: 2015

Einordung:
Institut: Professur Aquakultur und Sea-Ranching

Abstract:
A new species of the genus Dollfusiella
Campbell & Beveridge, 1994 is described from Pastinachus
sephen (Forsska°l) in the Persian Gulf. Dollfusiella
qeshmiensis n. sp. is allocated to the genus Dollfusiella
based on the possession of two bothria, prebulbar organs, a
heteroacanthous typical armaturewith tightly spaced rows
of hollow hooks, a basal swelling and a characteristic basal
armature without prominent macrohooks.The presence of
an enlarged external seminal vesicle in Dollfusiella
qeshmiensis n. sp. distinguishes this species from
D. michiae (Southwell, 1929), D. bareldsi (Beveridge,
1990), D. owensi (Beveridge, 1990), D. geraschmidti
(Dollfus, 1974), D. angustiformis Schaeffner & Beveridge,
2013, D. hemispinosa Schaeffner & Beveridge,
2013, D. spinosa Schaeffner & Beveridge, 2013 and
D. taminii Menoret & Ivanov, 2014. The new species is
distinguished from the remaining species within the genus
by a combination of the followingmorphological features:
the number of testes per segment, the number of testis
columns and the number of homeomorphous hooks per
half spiral row in the metabasal region. In the most recent
taxonomic key to the species of Dollfusiella, the presence
or absence of enlarged, microscopically visible
spinitriches on the scolex was used as the first distinguishing
character dividing the congeners into two groups.
Since the existence of visible microtriches on the scolex
peduncle ofD. vooremi (Sa˜oClemente&Gomes, 1989), a
species so far grouped among the species lacking
visible microtriches on the scolex, has been recently
demonstrated, and given the fact that the presence of
microscopically visible microtriches on the scolex is
variable in some eutetrarhynchid species, a newkey to the
species of Dollfusiella is provided in which the spinitriches
have been given less priority.

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