Grillotia dollfusi sp. n. (Cestoda: Trypanorhyncha) from the Skate, Raja chilensis, from Chile, and a Note on G. heptanchi

Carvajal, G Juan

doi:10.2307/3277978

The Journal of Parasitology

1971

DOI: 10.2307/3277978

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Grillotia dollfusi sp. n. (Cestoda: Trypanorhyncha) from the Skate, Raja chilensis, from Chile, and a Note on G. heptanchi

G Juan Carvajal¹

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Cited by 8 publications

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Revision of the Grillotia erinaceus (van Beneden, 1858) species complex (Cestoda: Trypanorhyncha), with the description of G. brayi n. sp.

Beveridge

Campbell

2007

Syst Parasitol

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Members of the trypanorhynch cestode genus Grillotia Guiart, 1927 belonging to the Grillotia erinaceus (van Beneden, 1858) species complex are redescribed. The type-species of the genus, G. erinaceus, is redescribed from Raja spp. in the eastern and western north Atlantic and the Mediterranean. The redescription establishes the presence of: an hermaphroditic sac; internal and external seminal vesicles (but absence of an accessory seminal vesicle); a uterine pore; and the attachment of the retractor muscle in the mid-region of the tentacular bulb. G. pseuderinaceus Dollfus, 1969 and G. recurvispinis Dollfus, 1969 from Raja spp. in the Mediterranean are considered to be synonyms of G. erinaceus, following Palm (2004). G. dollfusi Carvajal, 1971 from R. chilensis Guichenot off Chile is redescribed from the paratypes and features of the terminal genitalia, consistent with those of G. erinaceus, are described for the first time. G. musculara (Hart, 1936) is redescribed from new material collected from the type-host, R. rhina (Jordan & Gilbert), off Nanaimo on the western coast of Canada. The features of the terminal genitalia of G. musculara are similar to those of the G. erinaceus group. The morphological features of G. borealis Keeney & Campbell, 2001 from Bathyraja spp. in the Bering Sea and the Sea of Okhotsk are summarised and illustrations of this species provided. G. brayi n. sp. is described from Amblyraja radiata from the coasts of Iceland and Britain. The new species differs from other members of the complex in lacking modified hooks 1 and 1' at the base of the tentacle (differentiating it from G. erinaceus), a long pars vaginalis (differentiating it from G. dollfusi) and uncinate hooks in the band on the external surface of the tentacle (differentiating it from G. musculara). Brief descriptions are provided of two apparently new species of Grillotia currently represented in collections by single specimens.

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Revision of the Grillotia erinaceus (van Beneden, 1858) species complex (Cestoda: Trypanorhyncha), with the description of G. brayi n. sp.

Beveridge

Campbell

2007

Syst Parasitol

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A new species of Grillotia Guiart, 1927 (Cestoda: Trypanorhyncha) from the spotted skate, Raja straeleni Poll, in South Africa

Oosthuizen

Acosta

Smit

et al. 2021

Parasitology International

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A review of longnose skates Zearaja chilensis and Dipturus trachyderma

et al. 2015

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Longnose skates may have a high intrinsic vulnerability among fishes due to their large body size, slow growth rates and relatively low fecundity, and their exploitation as fisheries target-species places their populations under considerable pressure. These skates are found circumglobally in subtropical and temperate coastal waters. Although longnose skates have been recorded for over 150 years in South America, the ability to assess the status of these species is still compromised by critical knowledge gaps. Based on a review of 185 publications, a comparative synthesis of the biology and ecology was conducted on two commercially important elasmobranchs in South American waters, the yellownose skate Zearaja chilensis and the roughskin skate Dipturus trachyderma; in order to examine and compare their taxonomy, distribution, fisheries, feeding habitats, reproduction, growth and longevity. There has been a marked increase in the number of published studies for both species since 2000, and especially after 2005, although some research topics remain poorly understood. Considering the external morphological similarities of longnose skates, especially when juvenile, and the potential niche overlap in both, depth and latitude it is recommended that reproductive seasonality, connectivity and population structure be assessed to ensure their long-term sustainability.

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Grillotia dollfusi sp. n. (Cestoda: Trypanorhyncha) from the Skate, Raja chilensis, from Chile, and a Note on G. heptanchi

Cited by 8 publications

References 0 publications

Revision of the Grillotia erinaceus (van Beneden, 1858) species complex (Cestoda: Trypanorhyncha), with the description of G. brayi n. sp.

Revision of the Grillotia erinaceus (van Beneden, 1858) species complex (Cestoda: Trypanorhyncha), with the description of G. brayi n. sp.

A new species of Grillotia Guiart, 1927 (Cestoda: Trypanorhyncha) from the spotted skate, Raja straeleni Poll, in South Africa

A review of longnose skates Zearaja chilensis and Dipturus trachyderma

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