A revision of the Mediterranean Raphitomidae (Gastropoda Conoidea) 6: on the Raphitoma corbis (Potiez et Michaud, 1838)

Pusateri, Francesco; Giannuzzi-Savelli, Riccardo; Bartolini, Stefano

doi:10.31396/biodiv.jour.2018.9.3.217.225

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…Colour from firm brown to light hazel, rarely even some costae are equally clear. Sometime in the last whorl there is a lighter cordlet on the suture (Pusateri et al, 2018) Remarks: Raphitoma corbis can be confused with R. atropurpurea, R. laviae, R. lineolata and R. densa. The differences of the species from the congeneric ones were discussed by Pusateri et al (2018: 220).…”

Section: Raphitoma Brunneofasciata Pusateri Gianuzzi-savelli and Olivementioning

confidence: 99%

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Raphitoma (Gastropoda:Conoidea:Raphitomidae) Species Distributed Along the Turkish Coasts

Öztürk¹,

Geyran²

2020

Turk. J. Fish. Aquat. Sci.

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Section: Raphitoma Brunneofasciata Pusateri Gianuzzi-savelli and Olivementioning

confidence: 99%

“…The differences of the species from the congeneric ones were discussed by Pusateri et al (2018: 220). Distribution: West and Central Mediterranean Sea (Pusateri et al, 2018). Turkish coasts: Aegean Sea (Pusateri et al, 2018: 221).…”

Section: Raphitoma Brunneofasciata Pusateri Gianuzzi-savelli and Olivementioning

confidence: 99%

Raphitoma (Gastropoda:Conoidea:Raphitomidae) Species Distributed Along the Turkish Coasts

Öztürk¹,

Geyran²

2020

Turk. J. Fish. Aquat. Sci.

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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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Potential Ancestral Conoidean Toxins in the Venom Cocktail of the Carnivorous Snail Raphitoma purpurea (Montagu, 1803) (Neogastropoda: Raphitomidae)

Chiappa,

Fassio,

Modica

et al. 2024

Toxins

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Venomous marine gastropods of the superfamily Conoidea possess a rich arsenal of toxins, including neuroactive toxins. Venom adaptations might have played a fundamental role in the radiation of conoideans; nevertheless, there is still no knowledge about the venom of the most diversified family of the group: Raphitomidae Bellardi, 1875. In this study, transcriptomes were produced from the carcase, salivary glands, and proximal and distal venom ducts of the northeastern Atlantic species Raphitoma purpurea (Montagu, 1803). Using a gut barcoding approach, we were also able to report, for the first time, molecular evidence of a vermivorous diet for the genus. Transcriptomic analyses revealed over a hundred putative venom components (PVC), including 69 neurotoxins. Twenty novel toxin families, including some with high levels of expansion, were discovered. No significant difference was observed between the distal and proximal venom duct secretions. Peptides related to cone snail toxins (Cerm06, Pgam02, and turritoxin) and other venom-related proteins (disulfide isomerase and elevenin) were retrieved from the salivary glands. These salivary venom components may constitute ancestral adaptations for venom production in conoideans. Although often neglected, salivary gland secretions are of extreme importance for understanding the evolutionary history of conoidean venom.

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A revision of the Mediterranean Raphitomidae (Gastropoda Conoidea) 6: on the Raphitoma corbis (Potiez et Michaud, 1838)

Abstract: In this paper, the authors deal with Raphitoma corbis (Potiez et Michaud, 1838) (Gastropoda Conoidea), a poorly-known taxon differently interpreted over time, by fixing a neotype in order to stabilize the nomenclature because the type material has been lost.

Cited by 5 publications

References 5 publications

Raphitoma (Gastropoda:Conoidea:Raphitomidae) Species Distributed Along the Turkish Coasts

Raphitoma (Gastropoda:Conoidea:Raphitomidae) Species Distributed Along the Turkish Coasts

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

Potential Ancestral Conoidean Toxins in the Venom Cocktail of the Carnivorous Snail Raphitoma purpurea (Montagu, 1803) (Neogastropoda: Raphitomidae)

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