Morphology and Development of <i>Odostomia columbiana</i> Dall and Bartsch (Pyramidellidae): Implications for the Evolution of Gastropod Development

Collin, Rachel; Wise, John B.

doi:10.2307/1542718

Cited by 9 publications

(3 citation statements)

References 17 publications

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“…The morphological information on outgroups was obtained from several recent reviews and phylogenetic studies (Challis, 1969; Hubendick, 1978; Brown, 1979; Haszprunar & Huber, 1990; Gosliner, 1991, 1994; Salvini‐Plawen, 1991; Huber, 1993; Jensen, 1996a, b; Poizat, 1978; Mikkelsen, 1996, 2002; Collin & Wise, 1997; Ponder & Lindberg, 1997; Ruthensteiner, 1999; Wägele & Willan, 2000; Dayrat & Tillier, 2002; Wägele & Klussmann‐Kolb, 2005; Golding, Ponder & Byrne, 2007). Information on Toledonia was derived from Odhner (1926), Hoffmann (1939), and from our own unpublished information on living Toledonia spp.…”

Section: Phylogenetic Analysismentioning

confidence: 99%

Towards a phylogeny and evolution of Acochlidia (Mollusca: Gastropoda: Opisthobranchia)

Schrödl

Neusser

2010

Zoological Journal of the Linnean Society

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The Acochlidia are unique among opisthobranch gastropods in combining extremely high morphological and ecological diversity with modest species diversity. The phylogeny of acochlidians has never been addressed by cladistic means, as their evolution has remained unknown. This study gives a first overview on more than 150 biological and morphological characters that are potentially useful for phylogenetic analysis. Based on 107 characters, a parsimony analysis (PAUP) was performed for all 27 valid acochlidian species together with 11 (plus two) outgroup taxa. The resulting strict consensus tree shows a moderate overall resolution, with at least some bootstrap support for most resolved nodes. The Acochlidia are clearly monophyletic, and originate from an unresolved basal opisthobranch level. The Acochlidia split into the Hedylopsacea (Tantulum (Hedylopsis (Pseudunela (Strubellia ('Acochlidium', 'Palliohedyle'))))) and Microhedylacea (Asperspina (Pontohedyle, 'Parhedyle', 'Microhedyle', (Ganitus, Paraganitus))). The formerly enigmatic Ganitidae, resembling sacoglossan opisthobranchs by having dagger-like rachidian radular teeth, are likely to be highly derived microhedylids. The paraphyly of some of the traditionally recognized family level taxa induced a preliminary reclassification. From the phylogenetic hypothesis obtained, we conclude that the acochlidian ancestor was marine mesopsammic. The colonization of limnic systems occurred twice, independently: first in the Caribbean (with the development of the small interstitial Tantulum elegans), and second in the Indo-Pacific, with a radiation of large-sized benthic acochlidian species. The evolution of extraordinary reproductive features, such as hypodermic impregnation by a complex copulative aparatus in hedylopsaceans, cutaneous insemination via spermatophores in microhedylaceans, and gonochorism in Microhedylidae s.l. (including Ganitidae), is discussed.

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Section: Phylogenetic Analysismentioning

confidence: 99%

Towards a phylogeny and evolution of Acochlidia (Mollusca: Gastropoda: Opisthobranchia)

Schrödl

Neusser

2010

Zoological Journal of the Linnean Society

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“…Resolving evolutionary relationships at the root of the panpulmonate radiation will permit comparative analyses of traits that facilitated the transition to non-marine habitats and promoted lineage diversification, including lungs, osmoregulatory systems and direct development [6,11,26,27,35,36]. Here, we greatly expand on prior phylogenomic analyses which included 0-1 siphonariids and 1-3 sacoglossans [32][33][34], improving taxonomic sampling for these key lineages.…”

Section: Introductionmentioning

confidence: 99%

Phylogenomic resolution of the root of Panpulmonata, a hyperdiverse radiation of gastropods: new insight into the evolution of air breathing

et al. 2022

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Transitions to terrestriality have been associated with major animal radiations including land snails and slugs in Stylommatophora (>20 000 described species), the most successful lineage of ‘pulmonates’ (a non-monophyletic assemblage of air-breathing gastropods). However, phylogenomic studies have failed to robustly resolve relationships among traditional pulmonates and affiliated marine lineages that comprise clade Panpulmonata (Mollusca, Gastropoda), especially two key taxa: Sacoglossa, a group including photosynthetic sea slugs, and Siphonarioidea, intertidal limpet-like snails with a non-contractile pneumostome (narrow opening to a vascularized pallial cavity). To clarify the evolutionary history of the panpulmonate radiation, we performed phylogenomic analyses on datasets of up to 1160 nuclear protein-coding genes for 110 gastropods, including 40 new transcriptomes for Sacoglossa and Siphonarioidea. All 18 analyses recovered Sacoglossa as the sister group to a clade we named Pneumopulmonata, within which Siphonarioidea was sister to the remaining lineages in most analyses. Comparative modelling indicated shifts to marginal habitat (estuarine, mangrove and intertidal zones) preceded and accelerated the evolution of a pneumostome, present in the pneumopulmonate ancestor along with a one-sided plicate gill. These findings highlight key intermediate stages in the evolution of air-breathing snails, supporting the hypothesis that adaptation to marginal zones played an important role in major sea-to-land transitions.

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“…At the same time, some invertebrate groups possess transient structures that play a role in circulation. Early cardiovascular development in many molluscs, for example, is marked by the appearance of an extracardiac structure termed the 'larval heart' (Salensky, 1872;Franc, 1940;Kohn, 1961;D'Asaro, 1965;Switzer-Dunlap and Hadfield, 1977;Little et al, 1985;Collin and Wise, 1997;Gibson, 2003;Gittenberger, 2003). The 'true' heart develops later and, in most species, there is a transitional phase during which the two hearts operate concomitantly before the larval heart degenerates and disappears (Delsman, 1914;Kriegstein, 1977).…”

Section: Introductionmentioning

confidence: 99%

Development of cardiovascular function in the marine gastropodLittorina obtusata(Linnaeus)

Bitterli

Rundle

Spicer

2012

Journal of Experimental Biology

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SUMMARYThe molluscan cardiovascular system typically incorporates a transient extracardiac structure, the larval heart, early in development, but the functional importance of this structure is unclear. We documented the ontogeny and regulatory ability of the larval heart in relation to two other circulatory structures, the true heart and the velum, in the intertidal gastropod Littorina obtusata. There was a mismatch between the appearance of the larval heart and the velum. Velar lobes appeared early in development (day4), but the larval heart did not begin beating until day13. The beating of the larval heart reached a maximum on day17 and then decreased until the structure itself disappeared (day24). The true heart began to beat on day17. Its rate of beating increased as that of the larval heart decreased, possibly suggesting a gradual shift from a larval heart-driven to a true heart-driven circulation. The true heart was not sensitive to acutely declining P O2 shortly after it began to beat, but increased in activity in response to acutely declining P O2 by day21. Larval heart responses were similar to those of the true heart, with early insensitivity to declining P O2 (day13) followed by a response by day15. Increased velum-driven rotational activity under acutely declining P O2 was greatest in early developmental stages. Together, these findings point to cardiovascular function in L. obtusata larvae being the result of a complex interaction between velum, larval and true heart activities, with the functions of the three structures coinciding but their relative importance changing throughout larval development.

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Morphology and Development of Odostomia columbiana Dall and Bartsch (Pyramidellidae): Implications for the Evolution of Gastropod Development

Cited by 9 publications

References 17 publications

Towards a phylogeny and evolution of Acochlidia (Mollusca: Gastropoda: Opisthobranchia)

Towards a phylogeny and evolution of Acochlidia (Mollusca: Gastropoda: Opisthobranchia)

Phylogenomic resolution of the root of Panpulmonata, a hyperdiverse radiation of gastropods: new insight into the evolution of air breathing

Development of cardiovascular function in the marine gastropodLittorina obtusata(Linnaeus)

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