New nematode species from the continental slope of New Zealand (Chromadorea, Microlaimida, and Chromadorida), and unexpected placement of the genus Molgolaimus Ditlevsen, 1921

Leduc, Daniel; Fu, Sujing; Zhao, Zeng Qi

doi:10.1007/s12526-019-00961-z

Cited by 7 publications

(2 citation statements)

References 30 publications

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“…However, all Selachinematidae included in the analysis were placed in a moderately supported monophyletic clade (bs = 88) and formed sister clade to all other Chromadoroidea. The former observation is consistent with all previous analysis involving Selachinematidae (Gerlach 1964b;Zhao 2015, 2016;Leduc et al 2019;Gharahkhani et al 2020). The characteristic two chambered stoma unique among Selachinematids was theorized by Gerlach (1964b) to have arisen from one resembling that of a Cyatholaimid, suggesting that the two are close relatives.…”

Section: Discussion and Molecular Phylogenysupporting

confidence: 89%

Description of a new marine predatory nematode Latronema dyngi sp. nov. (Nematoda, Chromadorida, Selachinematidae) from the west coast of Sweden and an updated phylogeny of Chromadoria

Ahmed

Holovachov

2020

Mar. Biodivers.

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A new nematode species, Latronema dyngi sp. nov., is described from Skagerrak off the west coast of Sweden with the type locality near Dyngö island. Latronema dyngi sp. nov. is characterized by multispiral amphideal fovea with circular outline, 0.2–0.3 corresponding body diameters wide in males and 0.1–0.2 corresponding body diameters wide in females, 12 cuticular longitudinal ridges and 18–27 precloacal supplements in males. Latronema dyngi sp. nov. most closely resembles L. orcinum in terms of body length; demanian ratios a, b, c and c′; number of amphid turns in males; and the ratio of spicule length to cloacal body diameter. The two species can be differentiated by the number longitudinal ridges on the cuticle (12 for Latronema dyngi sp. nov. vs 20–22 for L. orcinum) and spicule length (65–78 μm for L. dyngi vs 60 for L. orcinum) and shape (weakly arcuate for L. dyngi sp. nov. vs strongly arcuate for L. orcinum). We also performed a maximum likelihood phylogenetic analysis on over 250 nematodes of the subclass Chromadoria based on their nearly full-length 18S rDNA sequences. In agreement with previous studies, our analysis supported Selachinematidae as a monophyletic group and placed Richtersia Steiner, 1916 within Desmodoridae Filipjev, 1922 or just outside of the main Desmodorida clade with the latter placement not well supported.

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Section: Discussion and Molecular Phylogenysupporting

confidence: 89%

Description of a new marine predatory nematode Latronema dyngi sp. nov. (Nematoda, Chromadorida, Selachinematidae) from the west coast of Sweden and an updated phylogeny of Chromadoria

Ahmed

Holovachov

2020

Mar. Biodivers.

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“…Currently, the classification of nematodes is usually based on morphological, molecular and developmental evidence. Molecular phylogenetic analyses have proven to be a valuable tool to clarify relationships among marine nematode taxa, which are impossible to determine based on morphology alone [6,7]. In the present paper, only morphological descriptions are carried out for three new species; no molecular phylogenetic analyses are conducted on them, due to their clear phylogenetic status.…”

Section: Introductionmentioning

confidence: 97%

Three New Species of Free-Living Marine Nematodes of the Order Enoplida Filipjev, 1929 (Nematoda) from the Yellow Sea, China

Ban,

Sun,

Huang

2023

JMSE

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Three new nematode species belonging to the order Enoplida were discovered in the muddy and sandy sediment along the Shandong peninsula coast of the Yellow Sea during a biodiversity investigation of marine nematodes in the Yellow Sea. They are named Belbolla octobulba sp. nov., Ironella gracilis sp. nov. and Oxystomina longiseta sp. nov. Belbolla octobulba sp. nov. is characterized by having eight pharyngeal bulbs; spicules arcuate, broad and even; gubernaculum with a pair of dorso-caudal apophyses, about a third of the length of spicule; and two winged precloacal supplements. Ironella gracilis sp. nov. differs from known species by body slender, buccal cavity divided into conical vestibulum and cylindrical posterior portion, three sclerotized teeth located in the vestibulum; both circles of outer labial setae and cephalic setae 10 µm apart; elongated spicules weakly arcuate with central strip and cephalate proximal end; gubernaculum conical without apophysis; and a tubular precloacal supplement with a long seta at its anterior end. Oxystomina longiseta sp. nov. can be distinguished from other known species by the relatively long outer labial setae and cephalic setae; arcuate spicules expanded proximally with a median rib; gubernaculum small and oblong; and two unequal precloacal supplementary setae, anterior one short, posterior one very long. Updated keys to eighteen species of Belbolla and keys to four species of Ironella are given.

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Characterization of Achromadora porosa sp. n. (Chromadorida: Achromadoridae) from the coal mines, with a detailed inference on the phylogeny of the group and the relationships between congeners

Mahboob,

Asif,

Tahseen

2023

Biologia

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New nematode species from the continental slope of New Zealand (Chromadorea, Microlaimida, and Chromadorida), and unexpected placement of the genus Molgolaimus Ditlevsen, 1921

Cited by 7 publications

References 30 publications

Description of a new marine predatory nematode Latronema dyngi sp. nov. (Nematoda, Chromadorida, Selachinematidae) from the west coast of Sweden and an updated phylogeny of Chromadoria

Description of a new marine predatory nematode Latronema dyngi sp. nov. (Nematoda, Chromadorida, Selachinematidae) from the west coast of Sweden and an updated phylogeny of Chromadoria

Three New Species of Free-Living Marine Nematodes of the Order Enoplida Filipjev, 1929 (Nematoda) from the Yellow Sea, China

Characterization of Achromadora porosa sp. n. (Chromadorida: Achromadoridae) from the coal mines, with a detailed inference on the phylogeny of the group and the relationships between congeners

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