The Structural–Functional Relationship of the Para-Receptacle Structure in Acanthocephala

Amin, Omar M.; Heckmann, Richard A.; Standing, Michael D.

doi:10.1654/4257.1

Cited by 18 publications

(7 citation statements)

References 9 publications

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“…The species described in this study is a new species with six specific morphology characteristics that differentiate it from the other species. Anterior parareceptacle structure (PRS) (Amin et al, 2007) has been demonstrated in all described species (in this study). PRS was firstly described in Neoechinorhynchus (Neoechinorhynchus) qatarensis (Amin et al, 2002) from Qatar and subsequently in Neoechinorhynchus (Neoechinorhynchus) golvani (Salgado-Maldonado, 1978) from Mexico (Amin et al, 2002(Amin et al, , 2011b, Acanthogyrus (Acanthosentis) parareceptaclis (Amin, 2005) from Japan, Neoechinorhynchus ampullata (Amin et al, 2011) and Neoechinorhynchus (Neoechinorhynchus) ascus (Amin et al, 2011) from Vietnam, Acanthogyrus (Acanthosentis) barmeshoori (Amin et al, 2013) from Iran and Acanthosentis kashmirensis (Amin et al, 2017) from Kashmir.…”

Section: Resultssupporting

confidence: 58%

Three new species of Acanthocephala from Acanthogyrus (Acanthosentis) (Acanthocephala: Quadrigyridae) from tinfoil barb fish, Barbonymus schwanenfeldii in Lake Kenyir, Terengganu, Malaysia

et al. 2021

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This study was carried out in order to identify acanthocephalan species complexes, based on morphological variability, infecting Barbonymus schwanenfeldii from Lake Kenyir, Terengganu, Malaysia. Acanthocephala were fixed in ethanol, stained with aceto-carmine and studied morphologically by using a light microscope. Variation in morphological traits such as proboscis, proboscis receptacle, egg, testes shape and location, number of hooks and cement gland has been traditionally used to diagnose the acanthocephalans species but the delimitations between closely related species are still confusing and are always questionable among taxonomists. Molecular analysis was used for support the identification. Morphological variability prospecting reveals the presence of three different new species complexes from the subgenus Acanthosentis by referring published taxonomic keys. These new species may be distinguished from the other 46 described species of Acanthosentis by having six unique structures: the presence of an anterior parareceptacle structure (PRS); vaginal sleeve structure; a paired lateral, cone-shaped, muscular jacket surrounding the vagina; alternating pattern and size of proboscis hooks, variation in proboscis size and shape; the presence of the circular collar ring around the neck between the proboscis and trunk and lastly the presence of a muscular-like structure attached to the collar ring on the proboscis. These acanthocephalans found in the intestine of B. schwanenfeldii in Kenyir Lake Malaysia represent new species, named Acanthogyrus (Acanthosentis) kenyirensis n.sp., A. (A.) terengganuensis n.sp. and A. (A.) tembatensis n. sp.

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Section: Resultssupporting

confidence: 58%

Three new species of Acanthocephala from Acanthogyrus (Acanthosentis) (Acanthocephala: Quadrigyridae) from tinfoil barb fish, Barbonymus schwanenfeldii in Lake Kenyir, Terengganu, Malaysia

et al. 2021

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“…the para-receptacle structure and the vaginal sleeve. The para-receptacle structure has also been reported in species of Neoechinorhynchus , Paratenuisentis Bullock & Samuel, 1975 and Tenuisentis Van Cleave, 1936 (see Amin et al ., 2007, 2016, 2018; Herlyn & Taraschewski, 2017). To our knowledge, the para-receptacle structure has been observed in both sexes only in A.…”

Section: Resultsmentioning

confidence: 99%

Redescription ofAcanthogyrus(Acanthosentis)maroccanus(Dollfus, 1951) (Acanthocephala: Quadrigyridae), a parasite of the Algerian barbLuciobarbus callensis(Valenciennes) (Cyprinidae) in Algeria, and first molecular data

et al. 2019

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Acanthogyrus (Acanthosentis) maroccanus (Dollfus, 1951), an insufficiently described quadrigyrid acanthocephalan of cyprinid fishes from Northwest Africa, is redescribed based on recently collected specimens from the Algerian barb Luciobarbus callensis (Valenciennes) in Algeria. Newly observed morphological features for A. (A.) maroccanus include the arrangement of proboscis hooks (not in regular circles), the male reproductive structures extending into the copulatory bursa and the presence of a para-receptacle structure and vaginal sleeve. The mechanism of copulation of this acanthocephalan is described based on several copulating pairs. The phylogenetic position of A. (A.) maroccanus within Eoacanthocephala was assessed based on partial 28S rDNA sequences. Maximum likelihood and Bayesian inference analyses placed A. (A.) maroccanus in a clade with Palliolisentis (Demidueterospinus) ophiocephalus (Thapar, 1931), both species included in the Quadrigyridae, the only family within the Gyracanthocephala.

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“…Occurrence and geographical distribution of Acanthocephalus minor in the Lake Biwa basin. There is a nearly 100-year history of research on the fish acanthocephalans of Lake Biwa and its drainage basin (Kawamura 1918;Fujita 1927;Fukui 1929;Momma 1933, 1934;Yamaguti 1935Yamaguti , 1939Morisita 1936, 1937;Ito 1959;Nakajima et al 1975;Egusa 1975a, 1975b;Shimazu 1999;Grygier 2004;Amin 2005;Amin et al 2007aAmin et al , 2007b. In particular, during the 1930s, Yamaguti (1935Yamaguti ( , 1939 conducted a systematic survey of fish parasites in Japan including the Lake Biwa basin but did not report A. minor from the basin.…”

Section: Discussionmentioning

confidence: 99%

“…To date, 10 nominal species of fish acanthocephalan have been reported from the Lake Biwa basin (Table 1). Nishino (2012) made a similar list of fish acanthocephalans of the basin, but some references (viz., Kawamura 1918;Fujita 1927;Fukui and Morisita 1936;Ito 1959;Amin et al 2007b; Nagasawa and Grygier 2011) were not cited. Because Lake Biwa is an ancient lake (over four million years old; Horie 1984) and many endemic species occur in it (Nishino and Watanabe 2000;Kawanabe et al 2012), potential endemism of fish acanthocephalans has also been discussed.…”

Section: Discussionmentioning

confidence: 99%

Rediscovery of a Fish Acanthocephalan, Acanthocephalus minor (Echinorhynchida: Echinorhynchidae), in the Lake Biwa Basin, Central Japan, with a Review of the Fish Acanthocephalan Fauna of the Basin

Nagasawa

Nitta

2015

Spec.Div.

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Specimens of the echinorhynchid acanthocephalan Acanthocephalus minor Yamaguti, 1935 were collected from the rectum of a dark sleeper, Odontobutis obscura (Temminck and Schlegel, 1845), in an irrigation canal near Lake Biwa, Shiga Prefecture, west-central Japan. This represents a rediscovery of A. minor in the Lake Biwa basin after a gap of nearly 80 years. It appears not to be distributed in Lake Biwa proper, but to occur rarely in rivers and irrigation canals of a limited coastal area around the lake. To date, 10 nominal species of acanthocephalan in four families and three orders have been reported from fish in the Lake Biwa basin. Among these, striking morphological similarities between Acanthocephalus aculeatus Van Cleave, 1931 and its congener A. opsariichthydis Yamaguti, 1935 are noted. It is furthermore suggested that A. gotoi Van Cleave, 1925 could not maintain its population after the basin's wild population of its major host, Anguilla japonica Temminck and Schlegel, 1846, disappeared in the mid-1960s.

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The Structural–Functional Relationship of the Para-Receptacle Structure in Acanthocephala

Cited by 18 publications

References 9 publications

Three new species of Acanthocephala from Acanthogyrus (Acanthosentis) (Acanthocephala: Quadrigyridae) from tinfoil barb fish, Barbonymus schwanenfeldii in Lake Kenyir, Terengganu, Malaysia

Three new species of Acanthocephala from Acanthogyrus (Acanthosentis) (Acanthocephala: Quadrigyridae) from tinfoil barb fish, Barbonymus schwanenfeldii in Lake Kenyir, Terengganu, Malaysia

Redescription ofAcanthogyrus(Acanthosentis)maroccanus(Dollfus, 1951) (Acanthocephala: Quadrigyridae), a parasite of the Algerian barbLuciobarbus callensis(Valenciennes) (Cyprinidae) in Algeria, and first molecular data

Rediscovery of a Fish Acanthocephalan, Acanthocephalus minor (Echinorhynchida: Echinorhynchidae), in the Lake Biwa Basin, Central Japan, with a Review of the Fish Acanthocephalan Fauna of the Basin

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