Shell morphology and the radula structures of two closely related bulinid snails intermediate host of Schistosoma haematobium in Nigeria

Oso, Opeyemi G.; Odaibo, A. B.

doi:10.5897/ajb2017.16003

Cited by 5 publications

(3 citation statements)

References 24 publications

(25 reference statements)

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“…Penelitian terhadap dua spesies Bulinus anggota famili Bulinidae, dari Nigeria menunjukkan bahwa jumlah gigi rachidian, lateral dan marjinal atau pola radula dapat digunakan untuk membedakan B. globosus dan B. jousseaumei. Bulinus globosus diketahui memiliki pola radula 26/8/1/8/26 dan geligi marjinal berjumlah 5, sementara radula B. jousseaumei berpola 25/8/1/8/25 dan memiliki 6 geligi marjinal(Oso & Odaibo 2018).…”

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Radular Morphology of Thiarid from Raja Ampat

Isnaningsih

2021

J. Molusk. Indones.

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Radula in gastropods is considered as a constant and conservative character that can be used in classification and phylogenetic at certain taxa level. However, character of radula is also ecophenotypic, so that the morphology of the radula can also indicates intraspecific variations that able to detect differences among species. The insights of the radular morphology specific to Thiaridae is important for classifying species within this family. Through an enzymatic procedure using the proteinase-K, five radula of Thiarid from Raja Ampat were extracted. The results of research on radula showed that the five species studied had the taeniglossan radula type. The band of the radula is 1.8 - 4.8 mm long and consists of marginal teeth, lateral teeth, and rachidian. The radula formula is 2/1/R/1/2 with a 3-4/1/3-4 rachidian pattern and a 2-3/1/2-3 lateral teeth pattern. The mesocone shape of the rachidian and lateral teeth varies between rounded and pointed.

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Radular Morphology of Thiarid from Raja Ampat

Isnaningsih

2021

J. Molusk. Indones.

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“…The ability to identify medically and veterinary relevant species is important. Bulinid snail species are commonly categorised and identified using a combination of genital, radula and shell morphology [ 13 ], with taxonomic guides traditionally using morphological characters to identify species [ 1 , 14 – 19 ]. Genital morphology is the most dependable as complementary copulatory organs are essential for intraspecies mating [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Differentiation of Bulinus senegalensis and Bulinus forskalii Snails in West Africa Using Morphometric Analysis

Andrus,

Joof,

Wade

2024

Acta Parasit.

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Purpose Accurate identification of medically important intermediate host and vector species is crucial for understanding disease transmission and control. Identifying Bulinus snails which act as intermediate host species for the transmission of schistosomiasis is typically undertaken using conchological and genital morphology as well as molecular methods. Methods Here, a landmark-based morphometric analysis of shell morphology was undertaken to determine its utility to distinguish the closely related and morphologically similar sister species Bulinus senegalensis and Bulinus forskalii. The method was developed to increase the accuracy of conchological morphology methods to identify Bulinus species in the field. Both species are found in West Africa, but only B. senegalensis is implicated in the transmission of urogenital schistosomiasis. Results We found when scaled down to the same length, 3-whorl and 4-whorl (juvenile) B. senegalensis shells had a longer spire, narrower body whorl and shorter aperture than B. forskalii. In contrast, 5-whorl (adult) B. senegalensis had a shorter spire, but still had a shorter aperture and narrower body whorl than B. forskalii. Canonical Variate Analysis (CVA) showed minimal overlap between B. senegalensis and B. forskalii for 3-whorl and 4-whorl shells, with a clear separation for 5-whorl shells. Overall, B. senegalensis had a consistently shorter aperture size and narrower body whorl than B. forskalii for all development stages. Spire length was variable depending on the stage of development, with 3-whorl and 4-whorl shells having the opposite trends of adult shells. Conclusions Our study demonstrates the applicability of landmark-based morphometrics in distinguishing the medically important, Bulinus senegalensis from its morphologically similar sister species, Bulinus forskalii. We recommend using measurements based on spire length, penultimate whorl length, body whorl width and aperture size to differentiate B. senegalensis and B. forskalii, when used with the appropriate information for each shell’s development stage.

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“…Our morphological nding on R. rubiginosa is almost the same as that ofDung et al (2013),Monzon et al (1994), andAppleton & Miranda (2015), which carried on R. rubiginosa in Vietnam, Thailand, and South Africa. Generally, freshwater snail shells typically provide crucial taxonomic data that can be utilized to demonstrate species differences and reveal evolutionary links among various taxa(Opeyemi & Alexander 2018). Environmental changes without genetic change may result in distinct non-genetic changes in snail shell morphology Rundle et al (2004).…”

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Morphological and molecular identification of lymnaeid snail and trematodes cercariae in different water bodies in Perak, Malaysia

et al. 2023

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Lymnaeid snails are vital in transmitting trematode cercariae as an intermediate host that can infect buffalo and other ruminants and humans, causing signi cant economic losses. The study aimed to conduct morphological and molecular identi cation of snails and cercariae collected from the selected buffalo farms under palm oil integration in Perak, Malaysia. A cross-sectional study was conducted, and 35 water were investigated for the presence or absence of snails. A total of 836 lymnaeid snails were collected from three marshes wetlands. To identify the snail family and species, morphological identi cation was performed on each snail's shell, and to identify trematode cercariae types; the crushing method was used to observe the cercarial stage inside each snail's body. In addition, the Internal Transcribed Spacer 2 (ITS2) region and Cytochrome c oxidase subunit 1 (cox1) was used as the target gene to identify the snail species and cercarial types up to the species level. The result showed that the collected snails belong to the family Lymnaeidae and Radix rubiginosa species. The infection rate by cercarial emergence in snails was 8.73%. Five morphological cercarial types were observed which include: echinostome, xiphidiocercariae, gymnocephalous, brevifurcate-apharyngeate distome, and vivax. Using molecular methods, the identi ed cercariae belong to the three families, including Echinostomatidae, Plagiorchiidae, and Fasciolidae. This is the rst report on R. rubiginosa and different types of trematodes cercariae in buffalo farms under palm oil integration in Perak. Our nding con rmed that R. rubiginosa could serve as an intermediate host for a range of parasitic trematodes in Perak.

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Shell morphology and the radula structures of two closely related bulinid snails intermediate host of Schistosoma haematobium in Nigeria

Cited by 5 publications

References 24 publications

Radular Morphology of Thiarid from Raja Ampat

Radular Morphology of Thiarid from Raja Ampat

Differentiation of Bulinus senegalensis and Bulinus forskalii Snails in West Africa Using Morphometric Analysis

Morphological and molecular identification of lymnaeid snail and trematodes cercariae in different water bodies in Perak, Malaysia

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