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1. Monogenea of Chinese marine fishes. XVIII. Two monocotylids, including a new species, from the blotched fantail ray Taeniurops meyeni (Elasmobranchii: Dasyatidae) in the South China Sea

Creator:
Cao, Shanmei, Ding, Xuejuan, Zhang, Jianying, and Liu, Lin
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Monogenea, Heterocotyle taeniuropi, Dendromonocotyle pipinna, Taeniurops meyeni, and South China Sea
Language:
English
Description:
Two monogenean species are recorded from a blotched fantail ray, Taeniurops meyeni (Müller et Henle) (Dasyatidae), kept in a public aquarium at the Guangzhou Ocean World. Heterocotyle taeniuropi sp. n. was obtained from the gills. It is similar to Heterocotyle similis Neifar, Euzet et Ben Hassine, 1998 and H. scotti Neifar, Euzet et Ben Hassine, 1998, both of which have a similar male copulatory organ, but it can be distinguished from these two species by aspects of the morphology of the male copulatory organ, which is tubular, straight or slightly curved with a sclerotized accessory piece and an asymmetrical funnel-shaped opening at the proximal end, and recurved at the distal end. Dendromonocotyle pipinna Chisholm et Whittington, 2002, which is a new record for Chinese waters, was collected from the body surface of the same host. Its main features are almost the same as in the original description, except that it exhibits a variable number of marginal papillae.
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2. Polylabris lingaoensis sp. n. and Polylabris cf. mamaevi Ogawa et Egusa, 1980 (Monogenoidea: Microcotylidae) from perciform fishes in the Gulf of Tonkin, South China Sea

Creator:
Tingbao, Yang, Kritsky, Delane C., and Jun, Pan
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Monogenoidea, Microcotylidae, Polylabris, Polylabris lingaoensis, Polylabris cf. mamaevi, Ambassis gymnocephalus, Siganus fuscescens, South China Sea, and China
Language:
English
Description:
Polylabris lingaoensis sp. n. is described from the gills of the bald glassy, Ambassis gymnocephalus (Chandidae), from the Gulf of Tonkin (South China Sea), near Lingao, Hainan Province, China. The new species is characterized by a midventral vaginal pore, comparatively few (5-7) testes, and 2 parallel rows each comprised of 30-43 microcotylid clamps in the haptor. Polylabris lingaoensis is the only member of the genus known to parasitize a chandid host. Polylabris cf. mamaevi is described from the gills of the mottled spinefoot, Siganus fuscescens (Siganidae), from the South China Sea, which represents new host and locality records for the helminth. The gill parasites from S. fuscescens are tentatively assigned to P. mamaevi pending new collections and restudy of microcotylid species from siganid fishes.
Rights:
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3. Two new species of Halysioncum Caira, Marques, Jensen, Kuchta et Ivanov, 2013 (Cestoda, Diphyllidea) from Indo-Pacific rays of the genus Aetomylaeus Garman (Myliobatiformes, Myliobatidae)

Creator:
Ivanov, Verónica A. and Caira, Janine N.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
tapeworms, parasites, morphology, taxonomy, elasmobranchs, South China Sea, and Arafura Sea
Language:
English
Description:
Recent collections of cestode parasites from two species of the myliobatid genus Aetomylaeus Garman from several localities in the Pacific Ocean resulted in the discovery of two new species of Halysioncum Caira, Marques, Jensen, Kuchta et Ivanov, 2013. Halysioncum gibsoni sp. n. from Aetomylaeus maculatus (Gray) in the South China Sea off Borneo differs from all of its congeners in having the following combination of characters: 27 apical hooks (14 type A and 13 type B hooks), 11-12 lateral hooklets, 22-28 spines per column on the cephalic peduncle, testes distributed in a single column and an internal seminal vesicle. Halysioncum arafurense sp. n., recovered from Aetomylaeus cf. nichofii 2 (sensu Naylor et al. 2012b) in the Arafura Sea off the Wessel Islands, Northern Territory, Australia, can be distinguished from its congeners based on the following combination of characters: 23 apical hooks (12 type A and 11 type B hooks), the number of lateral hooklets (9-11), the number of spines per column on the cephalic peduncle (20-24), the number and distribution of the testes (13-15 testes in two irregular columns), and the distribution of vitelline follicles (interrupted dorsally at the level of the ovarian lobes). Both species represent the first verified records of diphyllideans from eagle rays of the genus Aetomylaeus and formally extend the host associations of diphyllideans to include a third genus of Myliobatiformes. The myliobatiforms are indeed an understudied group of available hosts for diphyllideans and represent interesting target hosts if the diversity of diphyllidean tapeworms is to be fully estimated and understood.
Rights:
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