Protozoarios parazitos de "Polydora Socialis"

Faria, Gomes de; Cunha, Marques Da; Fonseca, O. Da

doi:10.1590/s0074-02761918000100002

Cited by 2 publications

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“…occur in the intestine of spionid polychaetes. All these species have been studied only using light and, in some cases, scanning electron microscopy ( Caullery & Mesnil, 1897a ; Caullery & Mesnil, 1897b ; Caullery & Mesnil, 1914a ; Caullery & Mesnil, 1919 ; Von Kölliker, 1845 ; Von Kölliker, 1848 ; Mingazzini, 1891 ; Reichenow, 1932 ; Mackinnon & Ray, 1931 ; Ganapati, 1946 ; Kamm, 1922 ; Fowell, 1936 ; De Faria, De Cunha & Da Fonseca, 1918 ; Rueckert et al, 2018 ; Table S3 ). No molecular sequence data are available for Polyrhabdina except for two sequences published in Rueckert et al (2018) , which are currently retracted from GenBank to clarify potential fungal contamination (Dr. Rueckert, pers.…”

Section: Discussionmentioning

confidence: 99%

Evidence from the resurrected family Polyrhabdinidae Kamm, 1922 (Apicomplexa: Gregarinomorpha) supports the epimerite, an attachment organelle, as a major eugregarine innovation

Paskerova

Miroliubova

Valigurová

et al. 2021

PeerJ

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Background Gregarines are a major group of apicomplexan parasites of invertebrates. The gregarine classification is largely incomplete because it relies primarily on light microscopy, while electron microscopy and molecular data in the group are fragmentary and often do not overlap. A key characteristic in gregarine taxonomy is the structure and function of their attachment organelles (AOs). AOs have been commonly classified as “mucrons” or “epimerites” based on their association with other cellular traits such as septation. An alternative proposal focused on the AOs structure, functional role, and developmental fate has recently restricted the terms “mucron” to archigregarines and “epimerite” to eugregarines. Methods Light microscopy and scanning and transmission electron microscopy, molecular phylogenetic analyses of ribosomal RNA genes. Results We obtained the first data on fine morphology of aseptate eugregarines Polyrhabdina pygospionis and Polyrhabdina cf. spionis, the type species. We demonstrate that their AOs differ from the mucron in archigregarines and represent an epimerite structurally resembling that in other eugregarines examined using electron microscopy. We then used the concatenated ribosomal operon DNA sequences (SSU, 5.8S, and LSU rDNA) of P. pygospionis to explore the phylogeny of eugregarines with a resolution superior to SSU rDNA alone. The obtained phylogenies show that the Polyrhabdina clade represents an independent, deep-branching family in the Ancoroidea clade within eugregarines. Combined, these results lend strong support to the hypothesis that the epimerite is a synapomorphic innovation of eugregarines. Based on these findings, we resurrect the family Polyrhabdinidae Kamm, 1922 and erect and diagnose the family Trollidiidae fam. n. within the superfamily Ancoroidea Simdyanov et al., 2017. Additionally, we re-describe the characteristics of P. pygospionis, emend the diagnoses of the genus Polyrhabdina, the family Polyrhabdinidae, and the superfamily Ancoroidea.

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Section: Discussionmentioning

confidence: 99%

Evidence from the resurrected family Polyrhabdinidae Kamm, 1922 (Apicomplexa: Gregarinomorpha) supports the epimerite, an attachment organelle, as a major eugregarine innovation

Paskerova

Miroliubova

Valigurová

et al. 2021

PeerJ

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Cothurnia polydorica sp. nov. (Ciliophora: Peritrichia), a symbiont of shell-boring spionid polychaetes in the Sea of Japan, and a review of ciliates associated with polydorids

Jankowski

2014

Zoosystematica Rossica

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Small unidentified spionid polychaetes (Polydora sp.) boring in shells of gastropod and bivalve molluscs in the Nakhodka region are hosts of a new species of loricate peritrich named Cothurnia polydorica sp. nov. The large genus Cothurnia can be subdivided into two groups (subgenera or genera) with one or two zooids inside the lorica; C. polydorica is a monozoic (solitary) species; after cell division one of the daughter individuals becomes migratory and swims away. The trophont is not vermiform and thus is not typical of most cothurnids; contraction of fixed specimens is partial, in the adoral half only; the lorica has a second inner layer of material at its base; the stalk is very long as compared with other cothurnids. The migrants adhere to the tips of thick setae of the host but not to its body surface, on which there are scattered small parasitic rhynchodids sucking the host body fluid by short apical tubes. A review of ciliates associated with polydorids is given.

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Protozoarios parazitos de "Polydora Socialis"

Cited by 2 publications

References 0 publications

Evidence from the resurrected family Polyrhabdinidae Kamm, 1922 (Apicomplexa: Gregarinomorpha) supports the epimerite, an attachment organelle, as a major eugregarine innovation

Evidence from the resurrected family Polyrhabdinidae Kamm, 1922 (Apicomplexa: Gregarinomorpha) supports the epimerite, an attachment organelle, as a major eugregarine innovation

Cothurnia polydorica sp. nov. (Ciliophora: Peritrichia), a symbiont of shell-boring spionid polychaetes in the Sea of Japan, and a review of ciliates associated with polydorids

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