Two new species of Trichuris (Nematoda: Trichuridae) collected from endemic murines of Indonesia

Hasegawa, Hideo; Dewi, Kartika

doi:10.11646/zootaxa.4254.1.9

Cited by 466 publications

(8 citation statements)

References 27 publications

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“…Hence, it is also possible that T. muris is replaced by other whipworm species in SEA. This expectation is supported by the record of other whipworms from rodents elsewhere in the Oriental Region [17,18].…”

Section: Introductionmentioning

confidence: 67%

“…arrizabalagai n. sp. resembles T. cossoni n. sp, T. muris and T. germani in having a round tip of the spicule, but clearly differs from T. musseri and T. mallomyos, both possessing a sharply pointed distal tip of the spicule [18]. T. arrizabalagai n. sp.…”

Section: Remarksmentioning

confidence: 92%

“…Following the general assumption of no distinct species and because of strong morphological and metrical resemblance of specimens with T. muris, we assigned all species to T. muris in this previous work. Additional records of T. muris have been reviewed from New Guinea Island and Sulawesi Island by Hasegawa and Dewi [18] and Smales [17]. With the recent increase of our helminth collection from SEA rodents, including a growing number of specimens preserved for molecular studies, we here combine a genetic approach in combination with morphometrics to refine the systematics of whipworm specimens from SEA.…”

Section: Introductionmentioning

confidence: 99%

“…The present study aimed to shed light on the taxonomy of whipworms from rodents in SEA and to test whether specimens can be confirmed as "T. muris" as widely assumed. In addition our individuals were compared with the three previously described Trichuris species from SEA rodents: T. germani recorded in New Guinea Island from Pogonomys loriae and Pogonomys championi (Murinae) [17]; T. mallomyos from Mallomys rothschildi (Murinae) in New Guinea Island [18] and T. musseri recorded in Sulawesi from Echiothrix centrosa (Murinae) [18].…”

Section: Introductionmentioning

confidence: 99%

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Whipworms of south-east Asian rodents are distinct from Trichuris muris

Ribas

Wells

Morand

et al. 2020

Parasitology International

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The whipworm Trichuris muris is known to be associated with various rodent species in the northern hemisphere, but the species identity of whipworm infecting rodents in the Oriental region remains largely unknown. We collected Trichuris of Muridae rodents in mainland and insular Southeast Asia between 2008 and 2015 and used molecular and morphological approaches to identify the systematic position of new specimens. We discovered two new species that were clearly distinct from T. muris, both in terms of molecular phylogenetic clustering and morphological features, with one species found in Thailand and another one in Borneo. We named the new species from Thailand as Trichuris cossoni and the species from Borneo as Trichuris arrizabalagai. Molecular phylogeny using internal transcribed spacer region (ITS1-5.8S-ITS2) showed a divergence between T. arrizabalagai n. sp., T. cossoni n. sp. and T. muris. Our findings of phylogeographically distinct Trichuris species despite some globally distributed host species requires further research into the distribution of different species, previously assumed to belong to T. muris, which has particular relevance for using these species as laboratory model organisms.

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Section: Introductionmentioning

confidence: 67%

Section: Remarksmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Whipworms of south-east Asian rodents are distinct from Trichuris muris

Ribas

Wells

Morand

et al. 2020

Parasitology International

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“…The adult and larval parasites live in organisms of mammals such as ruminants, marsupials, carnivores, rodents and primates. The embryonic life stages of parasites develop in the environment (Hasegawa & Dewi, 2017;Xie et al, 2018;Eo et al, 2019). Currently, there are almost 80 species in the genus Trichuris, and most of them are parasites of specific host taxa (Callejón et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Morphobiological analysis of Trichuris vulpis (Nematoda, Trichuridae), obtained from domestic dogs

Євстаф’єва

Кравченко

Gutyj

et al. 2019

Regul. Mech. Biosyst.

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The parasitic nematode Trichuris vulpis Frölich, 1789 is the pathogen of trichuriasis in domestic and wild carnivores, and humans. This helminth species is distributed world-wide in populations of domestic dog (Canis lupus familiaris). The prevalence of T. vulpis in dogs depends to a large degree on the morphofunctional and biological adaptations of the parasite which support its high survivability in various environmental conditions. The present study considers the species-specific peculiarities of morphology, and metric parameters of the mature and embryonic stages of Trichuris nematodes parasitizing in C. lupus familiaris. We studied the periods of stages of development and infectious egg formation, and their survivability under optimal conditions for T. vulpis in laboratory culture. The differential characteristics of both female and male adult T. vulpis nematodes include the metric characteristics of cuticular protrusions at the surface of the anterior body part. The male T. vulpis nematodes can be distinguished from males of other species by the specifics of spicule sheath ornamentation, the shape and size of spicule, and the width of spicule sheath at different sections. In identification of the female nematodes of this species, it is necessary to consider the presence and size of papillary processes in the vulval area and metric parameters of vulva location. Nine metric characters of sexual dimorphism are described for T. vulpis nematodes. In laboratory conditions, five embryonic stages were observed for T. vulpis: protoplast, blastomere cleavage, and formation of bean-like embryo, larva and mobile larva. These stages are characterized by specific morphological features. The egg develops to the infectious stage at 27 °С in 18 days of culture, and their survivability is up to 76.6%. The egg development is associated with changes in their metric characters, such as decreasing egg length and width of egg shell, and increasing egg width and egg plug width.

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