Review of the Nassarius pauperus (Gould, 1850) complex (Nassariidae): Part 3, reinstatement of the genus Reticunassa, with the description of six new species

Galindo, Luis Javier; Kool, Hugo H.; Dekker, Henk

doi:10.5852/ejt.2017.275

Cited by 808 publications

(3 citation statements)

References 20 publications

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“…The intraspecific K2P COI divergences in the three putative species ranged from 0 to 1.82%, whereas the interspecific COI divergences ranged from 3.74 to 7.17%. These results are consistent with those for other Neogastropoda (particularly Nassariidae) that have intraspecific COI divergences ranging from 0 to 3.00% and interspecific COI divergences ranging from 2.10 to 19.80% (Zou et al 2011; Galindo et al 2017; Nerurkar et al 2020). As a result, the levels of sequence divergence among the three putative species are approximately comparable to species-level divergences in other neogastropod and nassariid genera.…”

Section: Systematicssupporting

confidence: 90%

Morphological and DNA analyses reveal cryptic diversity in Anentome wykoffi (Brandt, 1974) (Gastropoda: Nassariidae), with descriptions of two new species from Thailand

Chomchoei,

Backeljau,

Pimvichai

et al. 2023

Invertebr. Syst.

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The assassin snail genus Anentome is widely distributed in South East Asia. In Thailand, the genus comprises at least six species, one of which is Anentome wykoffi, a species that may act as an intermediate host of parasitic trematodes. Recent fieldwork has shown that A. wykoffi is far more common and widespread in Thailand than has been assumed, yet the taxonomy remains poorly known. Therefore, this study explores morphological and DNA sequence (COI and 28S rRNA) variation in A. wykoffi to verify and finetune the taxonomic interpretation of this species. To this end, 12 populations of A. wykoffi were sampled in Thailand. This survey allowed us to preliminarily distinguish three putatively cryptic morphotypes. Shell shape measurements and geometric morphometric analyses revealed significant differences between these morphotypes, whereas SEM observations of the shell sculpture and radula confirmed the consistent separation of the three morphotypes. Finally, a combined phylogenetic and species delimitation analysis of COI and 28S rRNA sequence data showed that the three morphotypes represent three well-supported clades, one of which is sister group to A. cambojiensis. As such, the three morphotypes as defined by (1) the presence or absence of a carinated shoulder, (2) the number of spiral lines on the spira and (3) the pattern of the central cusps on the central radular tooth, are interpreted as three different species under the morphological and phylogenetic species concepts but also likely under the biological species concept, viz. A. wykoffi (sensu stricto), A. longispira sp. nov. and A. khelangensis sp. nov. The three cryptic species are (re)described and the implications of separation are briefly discussed.

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Section: Systematicssupporting

confidence: 90%

Morphological and DNA analyses reveal cryptic diversity in Anentome wykoffi (Brandt, 1974) (Gastropoda: Nassariidae), with descriptions of two new species from Thailand

Chomchoei,

Backeljau,

Pimvichai

et al. 2023

Invertebr. Syst.

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“…The reconstructed phylogeny of Galindo et al (2016) showed that the cosmopolitan subfamily Nassariinae comprises about 80% of nassariid species diversity (MolluscaBase, 2020a). Up to five strongly supported clades were recovered within this subfamily and were assigned to genera with relatively distinct geographical distributions: the Indo-Pacific Nassarius and Reticunassa (the "pauper-complex" sensu Kool & Dekker, 2006, Galindo, Kool, & Dekker, 2017; the mostly Atlantic-Mediterranean Tritia; the (East and West) African Naytia; and the Caribbean-Panamanian Phrontis. Furthermore, these genera showed different types of protoconch.…”

Section: Introductionmentioning

confidence: 99%

Mitogenomic phylogeny of mud snails of the mostly Atlantic/Mediterranean genusTritia(Gastropoda: Nassariidae)

et al. 2021

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The mud snails endemic to the East Atlantic/Mediterranean region (genus Tritia; subfamily Nassariinae) account for the second highest diversity within the family Nassariidae (Gastropoda: Buccinoidea). In order to understand how the diversity of species, shell morphologies, and ecological traits evolved within this genus, a robust phylogenetic framework is needed, yet still unavailable due to high levels of homoplasy in shell morphology, the main trait used for their taxonomic classification. Here, the near-complete mitogenomes of 20 species representing more than half of the diversity of Tritia were sequenced. All mitogenomes of Tritia shared the same gene order, which is identical to the consensus reported for caenogastropods. The reconstructed phylogeny indicates that all analyzed Tritia species formed a natural group except Tritia vaucheri, which was sister to an early diverging clade within subfamily Nassariinae that includes species of genus Reticunassa sister to Nassarius jacksonianus and Nassarius sp. Within Tritia, the Northwest Atlantic species Tritia obsoleta was placed as the sister group of three mostly East Atlantic/Mediterranean clades (I-III), prompting the reinstatement of the genus Ilyanassa. The latter three clades corresponded to different shell features (I, shell mostly with marked sculpture; II, shell with strong nodules and small size; and III, smooth shell). For Tritia incrassata, the analyzed specimens from Norway and from the Spanish Mediterranean coasts showed notable genetic divergence, which may indicate the existence of cryptic species. The ancestral character state reconstruction of protoconch inferred that the ancestor of Tritia had planktotrophic larvae, and that a transition to lecithotrophy occurred independently at least three times within Nassariinae. The reconstructed chronogram dated the origin of Tritia in the Oligocene and main diversification events during the Miocene to Pleistocene, correlated with drastic shifts in local paleoecosystems caused by cooling events, eustatic sea level changes, and the Messinian Salinity Crisis that favored temperate taxa.

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“…Couceiro et al [ 17 ] used the COI gene to distinguish between the two morphologically similar species, Nassarius nitidus and Nassarius reticulatus , which showed a clear barcoding gap. Using COI and 28S rDNA , Galindo et al [ 32 ] analyzed the Nassarius pauperus complex from the eastern Indian Ocean and western Pacific Ocean, including a revised concept of Nassa paupera Gould, 1850, type species of the genus Reticunassa Iredale, 1936, and discovered six new species. Lobo et al [ 53 ] pointed out that some of the so-called “universal primers” still failed to amplify COI-5P in some marine animal groups.…”

Section: Dna Barcoding Is Widely Used In Toxic Marine Algae and Mementioning

confidence: 99%

Advances in DNA Barcoding of Toxic Marine Organisms

Gong¹,

Ding²,

Wang³

et al. 2018

IJMS

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There are more than 200,000 marine species worldwide. These include many important economic species, such as large yellow croaker, ribbonfish, tuna, and salmon, but also many potentially toxic species, such as blue-green algae, diatoms, cnidarians, ctenophores, Nassarius spp., and pufferfish. However, some edible and toxic species may look similar, and the correct identification of marine species is thus a major issue. The failure of traditional classification methods in certain species has promoted the use of DNA barcoding, which uses short, standard DNA fragments to assist with species identification. In this review, we summarize recent advances in DNA barcoding of toxic marine species such as jellyfish and pufferfish, using genes including cytochrome oxidase I gene (COI), cytochrome b gene (cytb), 16S rDNA, internal transcribed spacer (ITS), and Ribulose-1,5-bisphosphate carboxylase oxygenase gene (rbcL). We also discuss the application of this technique for improving the identification of marine species. The use of DNA barcoding can benefit the studies of biological diversity, biogeography, food safety, and the detection of both invasive and new species. However, the technique has limitations, particularly for the analysis of complex objects and the selection of standard DNA barcodes. The development of high-throughput methods may offer solutions to some of these issues.

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Review of the Nassarius pauperus (Gould, 1850) complex (Nassariidae): Part 3, reinstatement of the genus Reticunassa, with the description of six new species

Cited by 808 publications

References 20 publications

Morphological and DNA analyses reveal cryptic diversity in Anentome wykoffi (Brandt, 1974) (Gastropoda: Nassariidae), with descriptions of two new species from Thailand

Morphological and DNA analyses reveal cryptic diversity in Anentome wykoffi (Brandt, 1974) (Gastropoda: Nassariidae), with descriptions of two new species from Thailand

Mitogenomic phylogeny of mud snails of the mostly Atlantic/Mediterranean genusTritia(Gastropoda: Nassariidae)

Advances in DNA Barcoding of Toxic Marine Organisms

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