Systematic review of the “<i>Chromodoris quadricolor</i>group” of East Africa, with descriptions of two new species of the genus<i>Chromodoris</i>Alder &amp; Hancock, 1855 (Heterobranchia, Nudibranchia)

Tibiriçá, Yara; Pola, Marta; Ortigosa, Deneb; Cervera, Juan Lucas

doi:10.1111/jzs.12334

Cited by 9 publications

(9 citation statements)

References 47 publications

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“…1, Table 2). The species contained in the ten datasets that have relatively large values of µ m /µ n exclusively represent members of single genera that have radiated recently [15][16][17][18][19][20][21][22][23]. For example, the Conus dataset that represents an outlier ( µ m /µ n = 56.7) includes 44 members of the Cape Verde species flock, a group of species that may have radiated explosively during the past few million years [15,24,25].…”

Section: Discussionmentioning

confidence: 99%

Patterns of variation of mutation rates of mitochondrial and nuclear genes of gastropods

Duda

2021

BMC Ecol Evo

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Background Although mitochondrial DNA (mtDNA) of many animals tends to mutate at higher rates than nuclear DNA (nuDNA), a recent survey of mutation rates of various animal groups found that the gastropod family Bradybaenidae (suborder Helicina) shows a nearly 40-fold difference in mutation rates of mtDNA ($$\mu$$ μ m) and nuDNA ($$\mu$$ μ n), while other gastropod taxa exhibit only two to five-fold differences. To determine if Bradybaenidae represents an outlier within Gastropoda, I compared estimated values of $$\mu$$ μ m/$$\mu$$ μ n of additional gastropod groups. In particular, I reconstructed mtDNA and nuDNA gene trees of 121 datasets that include members of various clades contained within the gastropod subclasses Caenogastropoda, Heterobranchia, Patellogastropoda, and Vetigastropoda and then used total branch length estimates of these gene trees to infer $$\mu$$ μ m/$$\mu$$ μ n. Results Estimated values of $$\mu$$ μ m/$$\mu$$ μ n range from 1.4 to 91.9. Datasets that exhibit relatively large values of $$\mu$$ μ m/$$\mu$$ μ n (i.e., > 20), however, show relatively lower estimates of $$\mu$$ μ n (and not elevated $$\mu$$ μ m) in comparison to groups with lower values. These datasets also tend to contain sequences of recently diverged species. In addition, datasets with low levels of phylogenetic breadth (i.e., contain members of single genera or families) exhibit higher values of $$\mu$$ μ m/$$\mu$$ μ n than those with high levels (i.e., those that contain representatives of single superfamilies or higher taxonomic ranks). Conclusions Gastropods exhibit considerable variation in estimates of $$\mu$$ μ m/$$\mu$$ μ n. Large values of $$\mu$$ μ m/$$\mu$$ μ n that have been calculated for Bradybaenidae and other gastropod taxa may be overestimated due to possible sampling artifacts or processes that depress estimates of total molecular divergence of nuDNA in groups that recently diversified.

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Section: Discussionmentioning

confidence: 99%

Patterns of variation of mutation rates of mitochondrial and nuclear genes of gastropods

Duda

2021

BMC Ecol Evo

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“…Previously, 22 species of Chromodoris were recognized and Layton et al (2018) found 39 species lineages. Tibiriçá et al (2020) found 7 distinct lineages of Chromodoris present in East Africa, including one not found by Layton et al (2018). Bonomo & Gosliner (2020) sequenced additional specimens and found 44 distinct species lineages in Chromodoris, indicating that even more hidden diversity is found in the genus.…”

Section: Discussionmentioning

confidence: 80%

“…Perhaps the most surprising result was the recent work by Layton et al (2018) on Indo-Pacific species of Chromodoris. Subsequently, Tibiriçá et al (2020) described an additional two new species of Chromodoris from East Africa, C. celinae Tibiriçá, Pola, Ortigosa &Cervera, 2020 andC. helium Tibiriçá, Pola, Ortigosa &Cervera, 2020. Chromodoris is the most well-studied genus within the family and Layton et al (2018) recognized 17 new species, of which 5 were found from the Philippines.…”

Section: Introductionmentioning

confidence: 99%

“…Subsequently, Tibiriçá et al (2020) described an additional two new species of Chromodoris from East Africa, C. celinae Tibiriçá, Pola, Ortigosa &Cervera, 2020 andC. helium Tibiriçá, Pola, Ortigosa &Cervera, 2020. Chromodoris is the most well-studied genus within the family and Layton et al (2018) recognized 17 new species, of which 5 were found from the Philippines. Two of these species have been described recently (Bonomo & Gosliner, 2020) as C. quagga Bonomo &Gosliner, 2020 andC.…”

Section: Introductionmentioning

confidence: 99%

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Sleuthing cryptic Chromodorids (Mollusca, Nudibranchia): adding to Philippine marine biodiversity

2021

Philippine Journal of Systematic Biology

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The Verde Island Passage of the Philippines is renowned for its rich marine biodiversity and heterobranch mollusks are demonstrable models of that species richness of the region. Chromodorid nudibranchs represent a particularly rich taxon, with species of Chromodoris being one of the most iconic and abundant taxa in shallow water coral reef environments. Despite being one of the best-documented clades of nudibranch mollusks, recent work has shown that numerous cryptic and pseudocryptic species are abundant in the waters of the Coral Triangle region. This paper reviews the species richness and distribution of Chromodoris species in the Philippines and provides a description of a new species of Chromodoris from the region. Chromodoris alcalai Gosliner, n. sp. is named to honor Dr. Angel Alcala’s 90th birthday and his pioneering contributions to preserving the marine biodiversity of the Philippines. This species is most similar externally to C. dianae Gosliner and Behrens, 1998, with which it was erroneous lumped. Distinctness of molecular data, external morphology and coloration, and internal anatomical features clearly distinguish these two species. KEYWORDS: systematics, Nudibranchia, coral reefs, Indo-Pacific, Coral Triangle

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“…Several lineages of heterobranch sea slugs contain multiple morphological conserved taxaoften pantropical found across ocean basins. These include sea hares (e. g., the Dolabrifera dolabrifera (Rang, 1828), Bursatella leachii Blainville, 1817, and Aplysia parvula M€ orch, 1863 species complexes; Vald es et al, 2018; Golestani et al, 2019;Bazzicalupo et al, 2020) but also sacoglossans (e. g., the Elysia ornata (Swainson, 1840) species complex; Krug et al, 2013;), cephalaspideans (e. g., the Chelidonura hirundinina (Quoy & Gaimard, 1833) species complex; Zamora-Silva & , and nudibranchs (e. g., Chromodoris quadricolor (R€ uppell & Leuckart, 1830) group;Tibiriç a et al, 2020). Due to the difficulties taxonomists have encountered identifying morphological differences between individuals from different ocean basins, most of these taxa have beenand some still areregarded as widely distributed species with disjunct ranges.…”

Section: Introductionmentioning

confidence: 99%

Molecular and morphological analyses reveal pseudocryptic diversity inMicromelo undatus(Bruguière, 1792) (Gastropoda: Heterobranchia: Aplustridae)

Feliciano

Malaquias

Stout

et al. 2021

Systematics and Biodiversity

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The genus Micromelo (family Aplustridae) occurs in almost all tropical and subtropical waters across the globe, with the exception of the Eastern Pacific. Most authors consider Micromelo undatus (Brugui ere, 1792) as the only valid species in this genus. This study examines populations of specimens identified as M. undatus across its geographic range, using morphological and genetic data from two mitochondrial genes (16S and CO1) and one nuclear gene (Histone H3). The results reveal that M. undatus is a complex of four species with consistent genetic and anatomical differences. A literature review and evaluation of type material indicates that available names exist for three of the four species. Micromelo guamensis, M. undatus and M. scriptus are resurrected for species found in the Western Pacific, the Atlantic Ocean, and widespread in the Indo-Pacific, respectively. A new name is introduced for another species found in the Western Pacific, namely Micromelo barbarae sp. nov. and a neotype is designated for the type species of the genus M. undatus.

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Systematic review of the “Chromodoris quadricolorgroup” of East Africa, with descriptions of two new species of the genusChromodorisAlder & Hancock, 1855 (Heterobranchia, Nudibranchia)

Cited by 9 publications

References 47 publications

Patterns of variation of mutation rates of mitochondrial and nuclear genes of gastropods

Patterns of variation of mutation rates of mitochondrial and nuclear genes of gastropods

Sleuthing cryptic Chromodorids (Mollusca, Nudibranchia): adding to Philippine marine biodiversity

Molecular and morphological analyses reveal pseudocryptic diversity inMicromelo undatus(Bruguière, 1792) (Gastropoda: Heterobranchia: Aplustridae)

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