An ultrastructural study of the microtriches of adultProteocephalus tidswelli (Cestoda: Proteocephalidea)

Thompson, R. C. A.; Hayton, A. R.; Sue, Lindsay P. Jue

doi:10.1007/bf00927060

Cited by 57 publications

(49 citation statements)

References 34 publications

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“…Additionally, spination on the anterior region of the strobila as reported for the Acanthotaeniinae and Gangesiinae has been misinterpreted. The latter are identical to the microtriches present on the suckers, and similar to the very dense, filiform microtriches, previously observed (Thompson et al, 1980). (27) Longitudinal tegumental wrinkles.…”

Section: Character Analysissupporting

confidence: 85%

Preliminary phylogenetic analysis of subfamilies of the Proteocephalidea (Eucestoda)

et al. 1998

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Section: Character Analysissupporting

confidence: 85%

Preliminary phylogenetic analysis of subfamilies of the Proteocephalidea (Eucestoda)

et al. 1998

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“…Eggs were studied in distilled water. Microtrix terminology follows Thompson et al (1980) and Hoberg et al (1995). All measurements are given in micrometres unless otherwise indicated.…”

Section: Methodsmentioning

confidence: 99%

Ophiotaenia bonneti sp. n. (Eucestoda: Proteocephalidea), a parasite of Rana vaillanti (Anura: Ranidae) in Costa Rica

Chambrier¹,

Coquille²,

Brooks³

2006

FOLIA PARASIT

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Abstract. Ophiotaenia bonneti sp. n. is described from the intestine of the frog Rana vaillanti Brocchi, 1877 (Anura: Ranidae) from San Gerardo, Guanacaste, Costa Rica. The new species is characterized by the testes 100-177 in number, the genital pores situated anteriorly, the osmoregulatory canals overlapping the testis field, the cirrus pouch length as 15-24% of proglottis width, and the uterus with 18-32 ramified diverticula on each side. It differs from the 23 known species of the genus Ophiotaenia La Rue, 1911, parasitic in amphibians, by one to several morphological characters. It differs from O. gracilis Jones, Cheng et Gillespie, 1958, the most morphologically similar species, in the sucker diameter in % of scolex diameter and in the morphology of the eggs -funnel-like depression and embryophore closely investing the oncosphere in O. gracilis. We generally observe a very low mean prevalence of the Proteocephalidea in Neotropical amphibians (about 0.41%-3%), but in the case of some host species, the prevalence can reach up to 25%. We conclude that these cestodes exhibit a strict host specificity of the oioxene type. Ophiotaenia

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“…Therefore, to avoid confusion, the following names are used in this manuscript on the basis of an extensive review of the literature: (i) ''base'' (Jha & Smyth 1969;Thompson et al 1980;Holy & Oaks 1986;Palm 2004;''shaft'' according to Hayunga & Mackiewicz 1975;Richards & Arme 1981;Poddubnaya et al 2006) represents the proximal part of the microthrix characterized by a central core;…”

Section: Methodsmentioning

confidence: 99%

“…(ii) ''baseplate'' (used by Hayunga & Mackiewicz 1975;Thompson et al 1980;Caira & Littlewood 2001;Poddubnaya et al 2006) corresponds to a junctional region; and (iii) ''cap'' (Holy & Oaks 1986;Caira & Littlewood 2001;Palm 2004;''spine'' according to Hayunga & Mackiewicz 1975;Richards & Arme 1981;Poddubnaya et al 2006; ''shaft'' according to Jha & Smyth 1969;Thompson et al 1980) corresponds to the distal part of the microthrix with microfilaments.…”

Section: Methodsmentioning

confidence: 99%

“…Microtriches may differ in their structure, shape, size, and distribution between different species, between larvae (metacestodes) and adults, and also between regions of the tapeworm (Charles & Orr 1968;Grammeltvedt 1973;Thompson et al 1980;MacKinnon & Burt 1983;Kuperman 1988;Caira & Ruhnke 1991; %d'a´rska´& Nebesa´rˇova1 999, 2005). Structural variations of microtriches are mostly evident on the surface of the scolex (Lumsden & Hildreth 1983;Kuperman 1988;Jones 1998;Halton 2004; Palm 2004).…”

mentioning

confidence: 99%

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Ultrastructure of the tegument of the cestode Paraechinophallus japonicus (Bothriocephalidea: Echinophallidae), a parasite of the bathypelagic fish Psenopsis anomala

Levron

Poddubnaya

Kuchta

et al. 2008

Invertebrate Biology

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Abstract. The ultrastructure of the tegument in Paraechinophallus japonicus (Bothriocephalidea: Echinophallidae), a cestode parasite of the bathypelagic fish Psenopsis anomala, was studied using scanning and transmission electron microscopy. Paraechinophallus japonicus lacks a true scolex. Four different types of microtriches have been observed on the tegumental surface of P. japonicus. Capilliform (B2.3-mm long) and blade-like spiniform (B1.4-mm long) microtriches are intermingled on the surface of the pseudoscolex. Capilliform microtriches are distinct in possessing a short base and a long electron-lucent cap. The strobila is covered with two types of microtriches, namely filiform (B2.1-mm long) and tusk-shaped microtriches (r4.5-mm long). Tusk-shaped microtriches are limited to the posterior border of each proglottid and are characterized by a short and narrow base, and a large and wide, sharply pointed, electron-dense cap. Similar tusk-shaped microtriches were previously found in members of the family Echinophallidae and may represent an autapomorphy of echinophallid cestodes, all of them being parasitic in centrolophid fish. A unified terminology of microthrix parts is proposed.Additional key words: microtriches, unified terminology, TEM, SEM, Bothriocephalidea A remarkable feature of the cestode tegument is the presence of apical structures called microtriches (Rothman 1963). Microtriches may differ in their structure, shape, size, and distribution between different species, between larvae (metacestodes) and adults, and also between regions of the tapeworm (Charles & Orr 1968;Grammeltvedt 1973;Thompson et al. 1980;MacKinnon & Burt 1983;Kuperman 1988;Caira & Ruhnke 1991; %d'a´rska´& Nebesa´rˇova1 999, 2005). Structural variations of microtriches are mostly evident on the surface of the scolex (Lumsden & Hildreth 1983;Kuperman 1988;Jones 1998;Halton 2004; Palm 2004). The morphology and distribution of microtriches of the scolex is considered to be of phylogenetic importance and represent a potentially significant taxonomic character (Richmond & Caira 1991;Caira et al. 1999; Palm 2004;Agustı´et al. 2005;Gil de Pertierra 2005).Cestodes with paired attachment organs called bothria were traditionally placed in the order Pseudophyllidea. However, recent molecular studies have shown that the order is paraphyletic and consists of two unrelated assemblages (orders): Bothriocephalidea and Diphyllobothriidea (Brabec et al. 2006;Kuchta 2007;Kuchta et al. 2008). The existence of these two groups raises the question as to their differentiation on the basis of morphological and ultrastructural characters. Therefore, the fine morphology of the tegument of Paraechinophallus japonicus YAM-AGUTI 1934, a member of the family Echinophallidae belonging to the more derived group of previous pseudophyllidean cestodes, Bothriocephalidea, was studied using transmission and scanning electron microscopy (TEM and SEM).Invertebrate Biology 127(2): 153-161. r

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An ultrastructural study of the microtriches of adultProteocephalus tidswelli (Cestoda: Proteocephalidea)

Cited by 57 publications

References 34 publications

Preliminary phylogenetic analysis of subfamilies of the Proteocephalidea (Eucestoda)

Preliminary phylogenetic analysis of subfamilies of the Proteocephalidea (Eucestoda)

Ophiotaenia bonneti sp. n. (Eucestoda: Proteocephalidea), a parasite of Rana vaillanti (Anura: Ranidae) in Costa Rica

Ultrastructure of the tegument of the cestode Paraechinophallus japonicus (Bothriocephalidea: Echinophallidae), a parasite of the bathypelagic fish Psenopsis anomala

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