The ultrastructure of the cuticle of Nematoda

Urbancik, W.; Bauer-Nebelsick, Monika; Ott, Jörg

doi:10.1007/bf02526870

Cited by 13 publications

(2 citation statements)

References 29 publications

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“…A diagnosis of the genus Eubostrichus was recently given by Tchesunov (2013) and has subsequently been modified by Leduc (2013) to accommodate E. hortulanus Leduc, 2013. All species so far described belong to the FA (faintly annulated) group sensu Urbancik et al (1996a), in which the annulation involves <50% of the cuticle thickness. In E. topiarius, for example, the basal layer of the cuticle contributes 70% of the cuticle and is composed exclusively of longitudinal fibres.…”

Section: Discussionmentioning

confidence: 99%

Eubostrichus fertilis sp. n., a new marine nematode (Desmodoridae: Stilbonematinae) with an extraordinary reproductive potential from Belize, Central America

Ott

Leisch

Gruber‐Vodicka

2014

Nematol

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Eubostrichus fertilis sp. n. is described from fine subtidal sands in the Belize Barrier Reef system using LM and SEM illustrations and the sequence of the 18S rRNA gene. The new species is one of the smallest (mature specimens ranging from 1.88 to 3.03 mm) and the stoutest (a = 36-80) of all previously described Eubostrichus species. The closest relatives are E. parasitiferus and E. hopperi. It differs from the former in the more posterior position of the vulva and the postanal porids, and from the latter in the smaller size of the amphids, the shorter cephalic setae and the shape of the tail. Furthermore, it is remarkable for the prominent extent of the female genital system. Females have up to 18 eggs of similar size in their uteri. The body of the worm is covered by large (up to 45 μm long) crescent-shaped bacteria attached with both poles to the cuticle of the worm in a spiral pattern. The genus Eubostrichus is phylogenetically well supported on the basis of the 18S rRNA gene sequence. Eubostrichus gerlachi nom. nov. (= E. parasitiferus apud Gerlach, 1963 nec Chitwood, 1936) is proposed.

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Section: Discussionmentioning

confidence: 99%

Eubostrichus fertilis sp. n., a new marine nematode (Desmodoridae: Stilbonematinae) with an extraordinary reproductive potential from Belize, Central America

Ott

Leisch

Gruber‐Vodicka

2014

Nematol

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“…For simplicity, we refer to the ectosymbiont-free region of the L. oneistus body as the anterior (A) region and to the ectosymbiont-associated region as the posterior (P) region. Notably, the cuticle thins at the bacterial-coat onset (Urbancik et al 1996) (Fig. 2).…”

Section: Laxus Oneistus’ Identity Tagmentioning

confidence: 95%

Calling the roll on Laxus oneistus immune defense molecules

Bulgheresi

2011

Symbiosis

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Screwed up: Spirality of segments and other iterated structures suggest an underlying principle of seriality in bilaterians

Scholtz

2021

Journal of Morphology

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This review deals with helicomery, that is, the specific malformation of a spiral arrangement of segments and other serial structures. Helicomery was first described in annelid and arthropod body segments. However, corresponding patterns occur in arthropod appendages and other bilaterians with serially arranged body parts, such as tapeworms, nematodes, vertebrates, and probably chitons. The specifics of the spirals such as length, orientation, and handedness are described. Most spirals are dorsal and comprise only a few loops. Helicomery is formed by a shift of cells during development or in adults caused by changes in cell adhesion or mechanical impacts such as lesions. A model for the formation of helicomery is proposed, which is based on medieval church labyrinths. These complex spiral structures are derived from concentric lines by the shift of relatively few tiles. This principle of “small causes, great effect” also applies to “spiral segments,” because helicomery dissolves segmental patterns and questions the concept of segments as distinct structures. The widespread occurrence of helicomery in nonhomologous serial structures might indirectly indicate an underlying principle of seriality among Bilateria.

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The ultrastructure of the cuticle of Nematoda

Cited by 13 publications

References 29 publications

Eubostrichus fertilis sp. n., a new marine nematode (Desmodoridae: Stilbonematinae) with an extraordinary reproductive potential from Belize, Central America

Eubostrichus fertilis sp. n., a new marine nematode (Desmodoridae: Stilbonematinae) with an extraordinary reproductive potential from Belize, Central America

Calling the roll on Laxus oneistus immune defense molecules

Screwed up: Spirality of segments and other iterated structures suggest an underlying principle of seriality in bilaterians

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