An assessment of<i>Raphitoma</i>and allied genera (Neogastropoda: Raphitomidae)

Fassio, Giulia; Russini, Valeria; Pusateri, Francesco; Giannuzzi-Savelli, Riccardo; Høisæter, Tore; Puillandre, Nicolas; Modica, Maria Vittoria; Oliverio, Marco

doi:10.1093/mollus/eyz022

Cited by 7 publications

(2 citation statements)

References 29 publications

(18 reference statements)

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“…Polymerase chain reactions were performed following Russini et al (2023). The PCR conditions were as follows: initial denaturation (5 min at 94°C); 35 cycles of denaturation (30 s at 94°C), annealing (40 s at 48-50°C for cox1, 40 s 50-52 for gastropod 16S; 40 s at 56-60°C for 28S; 1.5 min 58°C for mtMSH and 40 sec 50-54 for ITS2°C) and extension (50 sec-1 min at 72°C); final extension (7 min at 72°C).…”

Section: Molecular Analyses and Sequence Alignmentmentioning

confidence: 99%

Spicy food for the egg-cowries: the evolution of corallivory in the Ovulidae (Gastropoda: Cypraeoidea)

Nocella,

Zvonareva,

Fassio

et al. 2024

Front. Mar. Sci.

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IntroductionHost-parasite associations provide very useful models to study adaptive processes. We investigated the interaction between carnivorous marine gastropods, the Ovulidae or egg-cowries, and their cnidarian food targets. Ovulidae (Fleming, 1828), is a family of specialized carnivorous caenogastropods that feed by browsing on octocorals (Anthozoa: Octocorallia: Malacalcyonacea and Scleralcyonacea) or, to a much lesser degree, on antipatharians (Anthozoa: Hexacorallia: Antipatharia) and Stylasteridae (Hydrozoa: Hydroidolina: Anthoathecata). Very scanty information is available on the phylogenetic relationships and the degree of specificity of the relationship with the cnidarians of this corallivorous lineage, especially for deep-water taxa.MethodsTo assess taxonomic identifications and investigate cnidarian/ovulid relationships in the context of their evolution, we generated an extensive molecular dataset comprising two mitochondrial (cox1 and 16S rDNA) and one nuclear gene (28S rDNA) from 524 specimens collected worldwide. The coral hosts of the ovulid species have been identified by integrating literature data with new records, employing morphological and/or molecular (the mitochondrial 16S rDNA and mtMSH, and the nuclear ITS2) markers.ResultsWe obtained a molecular phylogenetic framework for the Ovulidae, time-calibrated with nine reliable fossil records. An ancestral state reconstruction allowed to identify Hexacorallia or Hydroidolina as the most likely ancestral cnidarian host for the Ovulidae.DiscussionOur phylogenetic hypothesis revealed the existence of groups that do not completely correspond to the currently employed subfamilial arrangement. Concerning trophic ecology, while only pediculariines (Pedicularia and allied) are associated with hydrozoans (Stylasteridae), our results suggest that some ovulid lineages shifted independently between octocorals and hexacorals.

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Section: Molecular Analyses and Sequence Alignmentmentioning

confidence: 99%

Spicy food for the egg-cowries: the evolution of corallivory in the Ovulidae (Gastropoda: Cypraeoidea)

Nocella,

Zvonareva,

Fassio

et al. 2024

Front. Mar. Sci.

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“…Raphitomidae Bellardi, 1875, probably the most diverse family of Conoidea J. Fleming, 1882 (Kantor & Taylor 2002;Bouchet et al 2011) are represented in the Mediterranean by c. 50 species. The limits of the type genus Raphitoma Bellardi, 1847 in the Northeastern Atlantic and Mediterranean have been recently redefined (Fassio et al 2019) to comprise the fossil type species R. histrix Bellardi, 1847 and its extant descendant R. pseudohystrix (Sykes, 1906), the spiny species such as R. cordieri (Payraudeau, 1826) and R. horrida (Monterosato, 1884) and the species that have been sometimes grouped into the (sub)genus Philbertia Monterosato, 1884. Members of this family from Croatia were mentioned in several papers by various authors but their number was always estimated to be surprisingly low; even in the Brusina collection, stored at Hrvatski Prirodoslovni Muzej (HPM) in Zagreb, there are only eight species of Raphitomidae (Ilijanić & Stošić 1972).…”

Section: Introductionmentioning

confidence: 99%

Three new species of Raphitoma Bellardi, 1847 (Mollusca, Gastropoda, Raphitomidae) from Croatian waters (NE Adriatic Sea)

Prkić

Giannuzzi-Savelli²,

Pusateri³

et al. 2020

Zoosystema

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642

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S S EM ( ) Pu li ations s ienti ues du Mus um national d Histoire naturelle, Paris. .zoos stema. om S S EM ( ) Prkić J. et al. RÉSUMÉ Trois nouvelles espèces de Raphitoma Bellardi, 1847 (Mollusca, Gastropoda, Raphitomidae) de Croatie (nord-est de l'Adriatique). Trois nouvelles espèces de néogastropodes de la famille des Raphitomidae Bellardi, 1875 sont décrites des côtes croates de l'Adriatique : Raphitoma petanii Prkić, Giannuzzi-Savelli & Pusateri n. sp., R. pusaterii Prkić & Giannuzzi-Savelli n. sp., et R. stanici Prkić, Giannuzzi-Savelli & Pusateri n. sp. Ces nouvelles espèces sont différenciées dans un cadre de taxonomie intégrative par des caractères de la téléoconque et des données génétiques (séquences du COI). Elles appartiennent à un groupe d'espèces qui présentent des microgranules sur la surface externe de toutes les spirales de la téléoconque, et toutes trois ont une protoconque multispiralée, indiquant une phase larvaire planctotrophe. Raphitoma petanii Prkić, Giannuzzi-Savelli & Pusateri n. sp. et R. stanici Prkić, Giannuzzi-Savelli & Pusateri n. sp. sont essentiellement des espèces d'eaux peu profondes, tandis que R. pusaterii Prkić & Giannuzzi-Savelli n. sp. n'a été collectée que sur des fonds plus profonds avec du corail rouge, Corallium rubrum (Linnaeus, 1758). Raphitoma petanii Prkić, Giannuzzi-Savelli & Pusateri n. sp. et R. pusaterii Prkić & Giannuzzi-Savelli n. sp. ne sont connues à ce jour que de Croatie. Les syntypes de Murex echinatus Brocchi, 1814 sont figurés et discutés.

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Candidate cases of poecilogony in Neogastropoda: implications for the systematics of the genus Raphitoma Bellardi, 1847

Russini¹,

Giannuzzi-Savelli²,

Pusateri

et al. 2020

Invert. Systematics

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Poecilogony is the intraspecific variation in developmental mode, with larvae of different types produced by the same individual, population or species. It is very rare among marine invertebrates, and in gastropods has long been described only in a few opisthobranchs. The physiological and regulatory mechanisms underlying larval evolutionary transitions, such as loss of planktotrophy that occurred repeatedly in many caenogastropod lineages, are still largely unknown. We have studied the inter- v. intraspecific variation in larval development in the north-east Atlantic neogastropod genus Raphitoma Bellardi, 1847, starting with an iterative taxonomy approach: 17 morphology-based Preliminary Species Hypotheses were tested against a COI molecular-distance-based method (ABGD), and the retained species hypotheses were eventually inspected for reciprocal monophyly on a multilocus dataset. We subsequently performed an ancestral state reconstruction on an ultrametric tree of the 10 Final Species Hypotheses, time-calibrated by fossils, revealing that the interspecific changes were planktotrophy > lecithotrophy, and all have occurred in the Pleistocene, after 2.5 million years ago. This is suggestive of a major role played by Pleistocene Mediterranean oceanographic conditions – enhanced oligotrophy, unpredictable availability of water column resources – likely to favour loss of planktotrophy. Within this group of species, which has diversified after the Miocene, we identified one pair of sibling species differing in their larval development, Raphitoma cordieri (Payraudeau, 1826) and R. horrida (Monterosato, 1884). However, we also identified two Final Species Hypotheses, each comprising individuals with both larval developmental types. Our working hypothesis is that they correspond to one or two poecilogonous species. If confirmed by other nuclear markers, this would be the first documentation of poecilogony in the Neogastropoda, and the second in the whole Caenogastropoda. Although sibling species with different developmental strategies may offer good models to study some evolutionary aspects, poecilogonous taxa are optimally suited for identifying regulatory and developmental mechanisms underlying evolutionary transitions.

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An assessment ofRaphitomaand allied genera (Neogastropoda: Raphitomidae)

Cited by 7 publications

References 29 publications

Spicy food for the egg-cowries: the evolution of corallivory in the Ovulidae (Gastropoda: Cypraeoidea)

Spicy food for the egg-cowries: the evolution of corallivory in the Ovulidae (Gastropoda: Cypraeoidea)

Three new species of Raphitoma Bellardi, 1847 (Mollusca, Gastropoda, Raphitomidae) from Croatian waters (NE Adriatic Sea)

Candidate cases of poecilogony in Neogastropoda: implications for the systematics of the genus Raphitoma Bellardi, 1847

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