A new species of Rhynchospio (Annelida: Spionidae) in South Africa

Simon, Carol A.; Williams, L.; Henninger, T.O.

doi:10.1007/s12526-017-0842-9

Cited by 9 publications

(4 citation statements)

References 16 publications

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“…cf. foliosa have been recorded, molecular data are only available for seven species (Radashevsky et al, 2014(Radashevsky et al, , 2016aSimon et al, 2019b; this study), and the phylogenetic placements of the other six species (i.e., R . asiatica , R .…”

Section: Discussionmentioning

confidence: 99%

“…asiatica (Chlebovitsch, 1959), R . mzansi (Simon et al, 2019b), and an undescribed species R . aff .…”

Section: Introductionmentioning

confidence: 99%

“…darwini (Radashevsky, 2015), Fannie Bay, Northern Territory, Australia (12°26′8.16″S, 130°49′56.28″E); 11: R . mzansi (Simon et al, 2019b), Gansbaai, South Africa (34°36′S, 19°19′E); 12: R . aff .…”

Section: Introductionmentioning

confidence: 99%

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Morphological analysis of Rhynchospio aff. asiatica (Annelida: Spionidae) and comments on the phylogeny and reproduction of the family Spionidae

Qiu

et al. 2022

J. Ocean. Limnol.

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The genus Rhynchospio has fronto-lateral horns on prostomium, paired branchiae from chaetiger 2 to near the posterior end, capillary notochaetae only, and more than two pairs of pygidial cirri. Rhynchospio species are common in coastal soft bottom communities; nevertheless, many recorded Rhynchospio specimens around the world are currently undescribed. Here we described a Rhynchospio species based on specimens collected from Qingdao, China. Comparison with the reported DNA sequences of four gene markers (16S rRNA, 18S rRNA, 28S rRNA, and Histone H3) and brief morphological description of specimens collected from Jinhae Bay, South Korea, previously reported as Rhynchospio aff . asiatica , indicated that they are conspecifi c. Morphologically, specimens of R . aff . asiatica from Qingdao are characterized by having neuropodial hooded hooks from chaetigers 14-17 (vs. 10-23 in R . asiatica ) to near pygidial chaetigers, sperm from chaetiger 11 to 14 (vs. from chaetiger 11 to 21-22 in R . asiatica ), oocytes from chaetigers 16-17 to 26-39 (vs. from 22-24 in R . asiatica ), and 4-6 (vs. up to 6 in R . asiatica ) pygidial cirri. Genetically, Rhynchospio aff . asiatica is most closely related to R . arenincola Hartman, 1936 from California, USA with the interspecifi c distances of 20.02% (16S rRNA), 4.50% (18S rRNA), 8.44% (28S rRNA), 2.74% (Histone H3), and 6.10% (concatenated sequences). Water fl ow across the dorsum created by ciliary beating of the branchiae and nototrochs, observed on live specimens, may help transport gametes from reproductive segments in anterior and middle parts to the posterior brooding segments. Phylogenetic trees based on concatenated sequences of four gene markers of 54 spioniform species in 25 genera revealed two clades, covering the two subfamilies Spioninae and Nerininae respectively. Two families (i.e., Poecilochaetidae and Trochochaetidae) in the order Spionida were clustered within Spionidae, supporting a morphology-based proposal that these families bearing a pair of prehensile, grooved palps should be grouped within a more broadly defi ned family Spionidae. Mapping morphological and reproductive characteristics to the phylogenetic trees indicated that the ancestor of spionids might lack branchiae, broadcast spawn thick-envelop oocytes and ect-aquasperm, and produce planktotrophic larvae.

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Section: Discussionmentioning

confidence: 99%

“…asiatica (Chlebovitsch, 1959), R . mzansi (Simon et al, 2019b), and an undescribed species R . aff .…”

Section: Introductionmentioning

confidence: 99%

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Morphological analysis of Rhynchospio aff. asiatica (Annelida: Spionidae) and comments on the phylogeny and reproduction of the family Spionidae

Qiu

et al. 2022

J. Ocean. Limnol.

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“…Day (1967) reported 22 species of cirratulids for southern Africa, of which 12 have type localities outside of the region. Awad, Griffiths, & Turpie (2002) ascribed the low proportion of indigenous species in South Africa to the fact that this taxon has been well-sampled globally, but it is more likely that many of these non-indigenous species had actually been misidentified (see also Lewis & Karageorgopolous, 2008;Clarke, Paterson, Florence, & Gibbons, 2010;Simon, Sato-Okoshi, & Abe, 2019;Simon, Williams, & Henninger, 2019;Kara, Macdonald, & Simon, 2018), and that diversity of indigenous species has been greatly underestimated. It is therefore not surprising that the apparently cosmopolitan P. chrysoderma is actually two new indigenous species.…”

Section: Methyl Green Staining Pattern (Mgsp)mentioning

confidence: 99%

Protocirrineris (Polychaeta:Cirratulidae) in South Africa and description of two new species

Elías

Saracho-Bottero

Simon

2019

RBT

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Introduction: The knowledge of polychaetes in the subtropical region of Africa benefited from the activity of J. Day. However, 50 years after the publication of his Monograph of the Polychaeta of southern Africa, it is necessary to reconsider the identity of the Cirratulidae due to changes in the diagnostic characters and new approaches to the taxonomy of the group to corroborate the status of cosmopolitan species in this region. Objective: We hypothesize that biodiversity of multitentacular Cirratulidae polychaetes has been significantly underestimated in southern Africa. Methods: The present work analyzes material deposited in the Iziko museum, as well as recently collected specimens, using scanning electron microscope to identify them. Results: The material corresponds to two new species belonging to the genus Protocirrineris. Protocirrineris strandloperarum sp. nov. is characterized by having the tentacular filaments between the chaetigers 5 to 10-12 and the first pair of branchiae from chaetiger 7, and P. magalhaesi sp. nov. is characterized by having tentacular filaments between chaetigers 4-8 and the first pair of branchiae from chaetigers 2 or 3. Descriptions of these species, with light and scanning electron microscope images, are given. Schematic drawings of the two new species are shown comparatively with diagnostic characters. Conclusions: The use of new techniques enables discovery of new taxonomic characters and two new species of the genus. The diversity of Cirratulidae polychaetes is underestimated also in the subtropical and tropical regions of Africa.

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Disentangling invasions in the sea: molecular analysis of a global polychaete species complex (Annelida: Spionidae: Pseudopolydora paucibranchiata)

et al. 2020

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A new species of Rhynchospio (Annelida: Spionidae) in South Africa

Cited by 9 publications

References 16 publications

Morphological analysis of Rhynchospio aff. asiatica (Annelida: Spionidae) and comments on the phylogeny and reproduction of the family Spionidae

Morphological analysis of Rhynchospio aff. asiatica (Annelida: Spionidae) and comments on the phylogeny and reproduction of the family Spionidae

Protocirrineris (Polychaeta:Cirratulidae) in South Africa and description of two new species

Disentangling invasions in the sea: molecular analysis of a global polychaete species complex (Annelida: Spionidae: Pseudopolydora paucibranchiata)

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