The genus<i>Pagodula</i>(Mollusca: Gastropoda: Muricidae) in Australia, the New Zealand region and the Tasman Sea

Marshall, B. A.; Houart, Roland

doi:10.1080/00288306.2011.537609

Cited by 4 publications

(14 citation statements)

References 10 publications

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“…The radula of Pagodula echinata (Figure 3A,B), as described here and in the previous works (Houart 2001;Marshall & Houart 2011), shows a typical muricine shape with the rachidian tooth bearing a major triangular central cusp, two small intermediate denticles on each side and two lateral cusps slightly smaller than the central one. The rachidian base is subrectangular, broad, anteriorly concave and has no marginal cusps.…”

Section: Morphological Datasupporting

confidence: 81%

“…This is a hypothesis to test when suitable livecollected material becomes available. Marshall & Houart (2011) through all latitudes and pointed out their particularly variable bathymetry (depth range, 70-3259 m); most species are found in deep seas, especially on seamounts and ridges, but some species are reported from shallower water.…”

Section: Phylogenetic Analysismentioning

confidence: 99%

“…The last clade, Pagodula, is widespread in deep-water basins around New Zealand and south-eastern Australia (Marshall & Houart 2011), the North Atlantic and Mediterranean Sea, as well as the Antarctic seamounts off the Ross Sea (with the subclade Pagodula cf. cuspidarioides).…”

Section: The Pagodulinae and Their Evolution In Antarctic Watersmentioning

confidence: 99%

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Cenozoic evolution of Muricidae (Mollusca, Neogastropoda) in the Southern Ocean, with the description of a new subfamily

Barco¹,

Schiaparelli²,

Houart³

et al. 2012

Zoologica Scripta

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Gastropods are among the most studied group in Antarctica, and taxa with an advanced status of systematic knowledge can be used as a model to study how oceanographic and climatic patterns shaped Recent faunal assemblages. Within the ongoing study of the muricid phylogeny, we have analysed molecular and morphological data from species traditionally ascribed to the muricid subfamily Trophoninae. Particularly, the availability of specimens collected in the Southern Ocean and surrounding basins allowed to demonstrate as the genera Pagodula, Xymenopsis, Xymene and Trophonella, which are traditionally classified in the Trophoninae, actually belong to a distinct lineage, for which the new subfamily Pagodulinae is herein introduced. We propose and discuss a possible framework for the origin and radiation of Antarctic muricids.

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Section: Morphological Datasupporting

confidence: 81%

Section: Phylogenetic Analysismentioning

confidence: 99%

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Cenozoic evolution of Muricidae (Mollusca, Neogastropoda) in the Southern Ocean, with the description of a new subfamily

Barco¹,

Schiaparelli²,

Houart³

et al. 2012

Zoologica Scripta

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“…In fact, non-vent endemic deep-water predatory gastropods have been recorded from vent periphery in several occasions, for example Buccinum viridum Dall, 1889 on the Juan de Fuca Ridge ( Tunnicliffe & Fontaine, 1987 ; Sarrazin et al, 1997 ), Enixotrophon carduelis and E. obtusus on the Kermadec Ridge ( Marshall & Houart, 2011 ), and Neptunea robusta Okutani, 1964 in the Okinawa Trough ( Watanabe & Kojima, 2015 ). Their success may be a combined effect of the ability to tolerate moderate environmental stress from vent periphery and the fact that few vent endemic gastropod species are predators, meaning there is an available niche for these predatory species given the high productivity.…”

Section: Resultsmentioning

confidence: 99%

“…Muricidae is a large family of carnivorous and generally predatory marine caenogastropods comprising about 1,600 living species ( Merle, Garrigues & Pointier, 2011 ). A total of seven muricids have been recorded from hydrocarbon seeps, but none from vents ( Sasaki et al, 2010 ) and two species ( Enixotrophon carduelis (Watson, 1882) and E. obtusus ( Marshall & Houart, 2011 ) were recorded from Rumble V Volcano which is a hydrothermally influenced area on the Kermadec Ridge ( Marshall & Houart, 2011 ). The present study, therefore, presents the second record of Calliostomatidae and the third record of Muricidae from hydrothermal vent ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Unanticipated discovery of two rare gastropod molluscs from recently located hydrothermally influenced areas in the Okinawa Trough

Chen

Watanabe

Miyazaki

et al. 2017

PeerJ

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BackgroundThe deep-sea hydrothermal vent is one of the most ‘extreme’ environments in the marine realm. Few species are capable of inhabiting such ecosystems, despite extremely high productivity there supported by microbial chemosynthesis, leading to high biomass and low species richness. Although gastropod molluscs are one of the main constituents of megafaunal communities at vent ecosystems, most species belong to several typical families (e.g., Provannidae, Peltospiridae, Lepetodrilidae) specialised and adapted to life at vents.MethodsDuring recent surveys of Okinawa Trough hydrothermal vent systems, two snails atypical of vent ecosystems were unexpectedly found in newly discovered hydrothermally influenced areas. Shell and radular characteristics were used to identify the gastropods morphologically.ResultsOne species was a vetigastropod, the calliostomatid Tristichotrochus ikukoae (Sakurai, 1994); and the other was a caenogastropod, the muricid Abyssotrophon soyoae (Okutani, 1959). Both gastropods were previously only known from regular non-chemosynthetic deep-sea and very rare—only two definitive published records exist for T. ikukoae and three for A. soyoae. The radula formula of Tristichotrochus ikukoae is accurately reported for the first time and based on that it is returned to genus Otukaia. For both species, barcode sequences of the cytochrome c oxidase I (COI) gene were obtained and deposited for future references.DiscussionThese new records represent the second record of calliostomatids from vents (third from chemosynthetic ecosystems) and the third record of muricids from vents (tenth from chemosynthetic ecosystems), and extend the distribution of both species to the southwest. Neither family has been recorded at chemosynthetic ecosystems in the western Pacific. Both were from weakly diffuse flow areas not subject to high temperature venting but were nevertheless associated with typical vent-reliant taxa such as Lamellibrachia tubeworms and Bathymodiolus mussels. These new records show that these species are capable of tolerating environmental stress associated with weak hydrothermally influenced areas, despite not being vent endemic species, adding to the list of known vent/non-vent species intersections. This signifies that such weakly influenced areas may provide key habitats for them, and that such areas may play a role in the evolution of biological adaptations to ‘extreme’ chemosynthetic ecosystems.

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Imbricated shell sculpture in benthic bivalves

Vermeij

Thomson

2023

Journal of Morphology

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Molluscan shells display a high diversity of external sculpture. Sculptural elements may be symmetrical, where both edges of an element are morphologically similar, or asymmetrical, where one edge is steeper than the other. Asymmetrical sculpture can be ratcheted, with the leading edges (those in the direction of locomotion or growth) less steep than the trailing edges, or imbricated (leading edges steeper than trailing edges). While the ratcheted sculpture is better known, the diversity of imbricated sculpture has remained largely unexplored. In a survey of extant benthic shellbearing molluscs, we document imbricated sculpture primarily in epifaunal bivalves or on the exposed sectors of shells of semi-infaunal bivalves. Imbricated sculpture is particularly widespread in pteriomorphian bivalves, but it is absent in the subclade Mytiloidea as well as in highly mobile Pectinidae. It also occurs in many carditid bivalves (Archiheterodonta) and in phylogenetically scattered euheterodonts. In several infaunal bivalves including species of Cardites (Carditidae), Hecuba (Donacidae), and Chione (Veneridae), comarginal elements on the posterior sector are imbricated whereas anterior comarginal ridges are ratcheted. Imbricated sculpture in bivalves tends to be concentrated on the upper (left) valves of pectinids or on the posterior sector of both valves in archiheterodonts and euheterodonts.Imbricated sculpture is uncommon in gastropods, even in epifaunal species, but does occur in the collabral ridges in some Vasidae and a few other groups. Expression of imbricated sculpture does not depend on shell mineral composition or microstructure. The ecological distribution and within-shell pattern of expression of imbricated sculpture point to the likelihood that this type of asymmetrical sculpture is both widespread and potentially functional. Additionally, we present a potential methodology whereby shell sculpture categories (symmetrical, ratcheted, and imbricated) may be quantified by comparing the lengths of corresponding leading and trailing edges across the shell surface.

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The genusPagodula(Mollusca: Gastropoda: Muricidae) in Australia, the New Zealand region and the Tasman Sea

Cited by 4 publications

References 10 publications

Cenozoic evolution of Muricidae (Mollusca, Neogastropoda) in the Southern Ocean, with the description of a new subfamily

Cenozoic evolution of Muricidae (Mollusca, Neogastropoda) in the Southern Ocean, with the description of a new subfamily

Unanticipated discovery of two rare gastropod molluscs from recently located hydrothermally influenced areas in the Okinawa Trough

Imbricated shell sculpture in benthic bivalves

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