3D-anatomy of a new tropical Peruvian nudibranch gastropod species, Corambe mancorensis, and novel hypotheses on dorid gill ontogeny and evolution

Martynov, Alexander; Brenzinger, Bastian; Hooker, Yuri; Schrödl, Michael

doi:10.1093/mollus/eyq047

Cited by 26 publications

(16 citation statements)

References 20 publications

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“…Soft parts were critical‐point dried, and samples were sputter coated (Polaron) and viewed in an LEO 1430 VP at 15 kV. Specimens were embedded in Spurr's low viscosity resin (Spurr, 1969), and serial histological semithin sections (1.5 µm) of Acanthodoris falklandica Eliot, 1907, all three Loy species, Corambe lucea Marcus, 1959, Corambe pacifica , and Corambe obscura , and Corambe mancorensis Martynov, Brenzinger, Hooker & Schrödl, 2011, from Peru, the anatomy of which was reconstructed three‐dimensionally (Martynov et al ., in press) with AMIRA following standard procedures (e.g. Neusser & Schrödl, 2007; Neusser, Martynov & Schrödl, 2009), were prepared, stained with methylene‐azure II (Richardson, Jarett & Finke, 1960), and analysed with a light microscope.…”

Section: Methodsmentioning

confidence: 99%

“…Neusser & Schrödl, 2007; Neusser, Martynov & Schrödl, 2009), were prepared, stained with methylene‐azure II (Richardson, Jarett & Finke, 1960), and analysed with a light microscope. The anatomy of the latter species was reconstructed three dimensionally (Martynov et al ., 2011) with AMIRA following standard procedures (e.g. Neusser & Schrödl, 2007; Neusser, Martynov & Schrödl, 2009).…”

Section: Methodsmentioning

confidence: 99%

“…The present study gives a comprehensive phylogenetic analysis on all 11 corambid species considered valid herein, including a recently described species from Peru (Martynov et al ., 2011), and an additional three undescribed corambid species (Gosliner, 1987; Rudman, 1998; A. Martynov and M. Schrödl, unpubl. data), using a wide range of morphological, histological, and some biological characters.…”

Section: Introductionmentioning

confidence: 99%

“…data), using a wide range of morphological, histological, and some biological characters. The resulting tree hypothesis is tested by bootstrap analysis, and its plausibility is assessed by its fit into biogeographic and evolutionary scenarios, which are developed by comparison with distributional, functional, ecological, and ontogenetic data (Thompson, 1967; Bickell & Chia, 1979; Bickell, Chia & Crawford, 1981; Martynov et al ., 2011). We show that corambids are an offshoot of Adalaria jannae Millen, 1987, like onchidoridid nudibranchs that originated in the northern Pacific.…”

Section: Introductionmentioning

confidence: 99%

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Phylogeny and evolution of corambid nudibranchs (Mollusca: Gastropoda)

Martynov

Schrödl

2011

Zoological Journal of the Linnean Society

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Organismic diversity, as well as distributional and ecological patterns, can be fully understood in an evolutionary framework only. Reliable phylogenetic trees are required to 'read history', but are not yet available for most marine invertebrate groups. Molecular systematics offers an enormous potential, but still fails for 'all-species approaches' on groups with species that are rare or occur in remote areas only, simply because there is no easily collectable material available for sequence analyses. Exploring morphologically aberrant corambid nudibranch gastropods as a case study, we assess whether or not morphology-based phylogenetic analyses can fill this gap and produce a tree that allows a detailed view on evolutionary history. Morphology-based parsimony analysis of corambids and potential relatives resulted in a well-resolved and remarkably robust topology. As an offshoot of kelp-associated onchidoridid ancestors, and obviously driven by the heterochronic shortening of life cycles and morphological juvenilization in an ephemeral habitat, the ancestor of corambids originated in cool northern Pacific coastal waters. A basal clade (the genus Loy) diverged there, adapting to live on soft bottoms under successive reversals of paedomorphic traits. The more speciose Corambe lineage radiated preying upon short-lived encrusting bryozoa in a high-energy kelp environment. Selection favoured transformation of the mantle into a cuticle-covered shield, and successive paedomorphic translocations of dorid anal gills to the protected ventral side of the body, where compensatory, multiple gills evolved. Corambe species probably first colonized tropical American seas, and then radiated in worldwide temperate waters: this is explained by the excellent long-distance dispersal abilities afforded by rafting on kelp, with the subsequent divergence of colonizers in allopatry. The competitive coexistence of Corambe pacifica MacFarland &O'Donoghue, 1929 and Corambe steinbergae (Lance, 1962) off California is the result of independent colonization events. The closing of the Isthmus of Panama separated the latter species from a flock that have radiated within warm Atlantic waters since then. Our case study shows that morphological structures, if investigated in depth, bear the potential for an efficient phylogenetic analysis of groups that are still elusive to molecular analyses. Tracing character evolution and integrating a wide range of geographic, biological, and ecological background information allowed us to reconstruct an evolutionary scenario for corambids that is detailed and plausible, and can be tested by future molecular approaches.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phylogeny and evolution of corambid nudibranchs (Mollusca: Gastropoda)

Martynov

Schrödl

2011

Zoological Journal of the Linnean Society

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“…Probably the first author who noticed the retention of juvenile features in the adult stage of a brittle star was René Koehler [30], while describing the strongly paedomorphic Ophiotypa simplex (Koehler, 1897). However, Koehler simultaneously remarked that such characters are “very primitive”–a typical mistake for many subsequent considerations of secondarily evolved paedomorphic characters as plesiomorphic ones in various taxa [19,31][19]. Matsumoto [32] suggested that some taxa in the family Ophiuridae with a morphology similar to juvenile stages may be paedomorphic.…”

Section: Introductionmentioning

confidence: 99%

Paedomorphosis as an Evolutionary Driving Force: Insights from Deep-Sea Brittle Stars

Stöhr¹,

Martynov²

2016

PLoS ONE

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Heterochronic development has been proposed to have played an important role in the evolution of echinoderms. In the class Ophiuroidea, paedomorphosis (retention of juvenile characters into adulthood) has been documented in the families Ophiuridae and Ophiolepididae but not been investigated on a broader taxonomic scale. Historical errors, confusing juvenile stages with paedomorphic species, show the difficulties in correctly identifying the effects of heterochrony on development and evolution. This study presents a detailed analysis of 40 species with morphologies showing various degrees of juvenile appearance in late ontogeny. They are compared to a range of early ontogenetic stages from paedomorphic and non-paedomorphic species. Both quantitative and qualitative measurements are taken and analysed. The results suggest that strongly paedomorphic species are usually larger than other species at comparable developmental stage. The findings support recent notions of polyphyletic origin of the families Ophiuridae and Ophiolepididae. The importance of paedomorphosis and its correct recognition for the practice of taxonomy and phylogeny are emphasized.

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A rare new species of Corambe Bergh, 1869 (Mollusca: Gastropoda: Nudibranchia) from the Caribbean Sea, with a review of the taxonomical history of the Corambidae Bergh, 1871

Caballer¹,

Ortea²

2018

Mar Biodiv

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3D-anatomy of a new tropical Peruvian nudibranch gastropod species, Corambe mancorensis, and novel hypotheses on dorid gill ontogeny and evolution

Cited by 26 publications

References 20 publications

Phylogeny and evolution of corambid nudibranchs (Mollusca: Gastropoda)

Phylogeny and evolution of corambid nudibranchs (Mollusca: Gastropoda)

Paedomorphosis as an Evolutionary Driving Force: Insights from Deep-Sea Brittle Stars

A rare new species of Corambe Bergh, 1869 (Mollusca: Gastropoda: Nudibranchia) from the Caribbean Sea, with a review of the taxonomical history of the Corambidae Bergh, 1871

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