Molecular confirmation of species status for the rare cephalaspidean Melanochlamys lorrainae (Rudman, 1968), and comparison with its sister species M. cylindrica Cheeseman, 1881

Krug, Patrick J.; Morley, Margaret S.; Asif, Jamal H.; Hellyar, Lynette L.; Blom, Wilma M.

doi:10.1093/mollus/eyn018

Cited by 14 publications

(6 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Just as the slugs themselves lack discrete characters or hard parts, many species descriptions lack relevant details and associated type specimens, resulting in taxonomic instability. Recent work on marine heterobranchs showcased how molecular characters can be incorporated into an integrative framework for describing species or resurrecting names lost to synonymy (Krug et al, 2007, 2008; Stout et al, 2010; Ornelas-Gatdula et al, 2012; Pola et al, 2012). However, heterobranch taxonomy lacks a common framework for delimiting species and defining threshold genetic distances (Krug et al, 2011; Jörger et al, 2012; Vendetti et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Integrative species delimitation in photosynthetic sea slugs reveals twenty candidate species in three nominal taxa studied for drug discovery, plastid symbiosis or biological control

Krug

Vendetti

Rodriguez

et al. 2013

Molecular Phylogenetics and Evolution

Self Cite

View full text Add to dashboard Cite

DNA barcoding can highlight taxa in which conventional taxonomy underestimates species richness, identifying mitochondrial lineages that may correspond to unrecognized species. However, key assumptions of barcoding remain untested for many groups of soft-bodied marine invertebrates with poorly resolved taxonomy. Here, we applied an integrative approach for species delimitation to herbivorous sea slugs in clade Sacoglossa, in which unrecognized diversity may complicate studies of drug discovery, plastid endosymbiosis, and biological control. Using the mitochondrial barcoding COI gene and the nuclear histone 3 gene, we tested the hypothesis that three widely distributed “species” each comprised a complex of independently evolving lineages. Morphological and reproductive characters were then used to evaluate whether each lineage was distinguishable as a candidate species. The “circumtropical” Elysia ornata comprised a Caribbean species and four Indo-Pacific candidate species that are potential sources of kahalalides, anti-cancer compounds. The “monotypic” and highly photosynthetic Plakobranchus ocellatus, used for over 60 years to study chloroplast symbiosis, comprised 10 candidate species. Finally, six candidate species were distinguished in the Elysia tomentosa complex, including potential biological control agents for invasive green algae (Caulerpa spp.). We show that a candidate species approach developed for vertebrates effectively categorizes cryptic diversity in marine invertebrates, and that integrating threshold COI distances with non-molecular character data can delimit species even when common assumptions of DNA barcoding are violated.

show abstract

Section: Discussionmentioning

confidence: 99%

Integrative species delimitation in photosynthetic sea slugs reveals twenty candidate species in three nominal taxa studied for drug discovery, plastid symbiosis or biological control

Krug

Vendetti

Rodriguez

et al. 2013

Molecular Phylogenetics and Evolution

Self Cite

View full text Add to dashboard Cite

show abstract

“…The extreme external and anatomical similarity of these species has caused a great deal of confusion and specimens found in different biogeographical areas have been misidentified as the same species. Owing to this similarity, the presence of species complexes such as that found in Notobryon is also present in several groups amongst opisthobranchs (Melanochlamys: Krug et al, 2008;sacoglossans: Carmona et al, 2011;Arminidae: Gosliner & Fahey, 2011;Navanax: Camacho-García et al, in press;Ornelas-Gatdula et al, in press). In light of modern taxonomic techniques such as molecular systematics, taxonomists have a powerful tool that frequently resolves cases where traditional taxonomy has proven to be insufficient to delineate species boundaries.…”

Section: Introductionmentioning

confidence: 91%

Molecular data illuminate cryptic nudibranch species: the evolution of the Scyllaeidae (Nudibranchia: Dendronotina) with a revision of Notobryon

Pola

Camacho-García

Gosliner

2012

Zoological Journal of the Linnean Society

View full text Add to dashboard Cite

Scyllaeidae represents a small clade of dendronotoid nudibranchs. Notobryon wardi Odhner, 1936, has been reported to occur in tropical oceans from the Indo‐Pacific and eastern Pacific to temperate South Africa. The systematics of Notobryon has not been reviewed using modern systematic tools. Here, specimens of Notobryon were examined from the eastern Pacific, the Indo‐Pacific, and from temperate South Africa. Additionally, representatives of Scyllaea and Crosslandia were studied. Scyllaeidae was found to be monophyletic. Notobryon was also found to be monophyletic and is the sister group to Crosslandia plus Scyllaea. The molecular data also clearly indicate that within Notobryon, at least three distinct species are present, two of which are here described. Genetic distance data indicate that eastern Pacific and South African exemplars are 10–23% divergent from Indo‐Pacific exemplars of Notobryon wardi. Scyllaea pelagica has been regarded as a single, circumtropical species. Our molecular studies clearly indicate that the Atlantic and Indo‐Pacific populations are distinct and we resurrect Scyllaea fulva Quoy & Gaimard, 1824 for the Indo‐Pacific species. Our morphological studies clearly corroborate our molecular findings and differences in morphology distinguish closely related species. Different species clearly have distinct penial morphology. These studies clearly reinforce the view that eastern Pacific, Indo‐Pacific, and temperate biotas consist largely of distinct faunas, with only a minor degree of faunal overlap. © 2012 The Linnean Society of London, Zoological Journal of the Linnean Society, 2012, 165, 311–336.

show abstract

“…Molecular studies are revealing cryptic species with more limited distributions for what were previously thought to be widely distributed variable species (e.g. for Bulla see Malaquias and Reid 2008 , for Melanochlamys see Krug et al 2008 , and for Thuridilla see Carmona et al 2011 ), and it is probable that molecular studies will reveal many more phyllidiid species than are currently accepted. It is therefore preferable to describe geographical and colour forms separately and clearly.…”

Section: Systematic Accountsmentioning

confidence: 99%

Opisthobranchs from the western Indian Ocean, with descriptions of two new species and ten new records (Mollusca, Gastropoda)

Yonow¹

2012

105

View full text Add to dashboard Cite

Seventy species of opisthobranchs are described in this work based on collections from the Persian Gulf, Socotra, Kenya, Zanzibar, Madagascar, La Réunion, Mauritius, the Seychelles, the Maldives, and Sri Lanka. Ten species are newly recorded from the western Indian Ocean and four species are recorded in the scientific literature for the first time since their original descriptions. Two species are described as new: Cyerce bourbonica sp. n. from La Réunion and Doriopsilla nigrocerasp. n. from the Persian Gulf coast of Saudi Arabia. Chromodoris cavae is removed from its synonymy with Chromodoris tennentana and redescribed from specimens from La Réunion, while several new synonyms are proposed for some commonly occurring species. Risbecia bullockii is recorded for the second time from the Indian Ocean and assigned to its correct genus.

show abstract

Molecular confirmation of species status for the rare cephalaspidean Melanochlamys lorrainae (Rudman, 1968), and comparison with its sister species M. cylindrica Cheeseman, 1881

Cited by 14 publications

References 48 publications

Integrative species delimitation in photosynthetic sea slugs reveals twenty candidate species in three nominal taxa studied for drug discovery, plastid symbiosis or biological control

Integrative species delimitation in photosynthetic sea slugs reveals twenty candidate species in three nominal taxa studied for drug discovery, plastid symbiosis or biological control

Molecular data illuminate cryptic nudibranch species: the evolution of the Scyllaeidae (Nudibranchia: Dendronotina) with a revision of Notobryon

Opisthobranchs from the western Indian Ocean, with descriptions of two new species and ten new records (Mollusca, Gastropoda)

Contact Info

Product

Resources

About