Taxonomy and anatomy of Amphiboloidea  (Gastropoda: Heterobranchia: Archaeopulmonata)

Golding, Rosemary E.; Ponder, Winston F.; Byrne, Maria

doi:10.11646/zootaxa.1476.1.1

Cited by 19 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 Information on Toledonia was derived from Odhner (1926), Hoffmann (1939), and from our own unpublished information on living Toledonia spp.…”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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“…Seven amphiboloidean taxa were examined: Salinator tecta G olding et al . 2007, Salinator fragilis L amarck 1822, Salinator rhamphidia G olding et al .…”

Section: Methodsmentioning

confidence: 99%

“…Seven amphiboloidean taxa were examined: Salinator tecta G olding et al . 2007, Salinator fragilis L amarck 1822, Salinator rhamphidia G olding et al . 2007, Naranjia swatowensis Y en 1939 (Amphibolidae), Maningrida arnhemensis G olding et al .…”

Section: Methodsmentioning

confidence: 99%

“…Among pulmonates, the Amphiboloidea is a small superfamily of estuarine gastropods, the systematics of which were recently revised to include three families: Amphibolidae, Phallomedusidae, and Maningrididae (Golding et al 2007). They are considered to be basal in Pulmonata (Hubendick 1978).…”

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confidence: 99%

“…Each family is distinguished primarily by reproductive morphology. Amphibolids have a monaulic reproductive system with a spermovipositor, phallomedusids have a penis and a syntremous diaulic reproductive system, and an unusual arrangement is seen in Maningrididae, which has a syntremous diaulic reproductive system featuring two copulatory structures of unknown function (Golding et al 2007). A New Zealand amphibolid, Amphibola crenata G melin 1791, has been described anatomically (Farnie 1919; Hubendick 1947) but the reproductive function of this or any other amphiboloid has not been discussed.…”

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confidence: 99%

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Novel copulatory structures and reproductive functions in Amphiboloidea (Gastropoda, Heterobranchia, Pulmonata)

Golding

Byrne

Ponder

2008

Invertebrate Biology

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Two new families of amphiboloid gastropods were recently erected, largely due to the very distinct structural and functional configurations of their distal reproductive systems. The spermovipositors in monaulic Salinator spp. (Amphibolidae) are functionally unique in Gastropoda, and it is suggested that they perform both oviposition and sperm transfer/receipt during non-reciprocal copulation. In contrast, the remarkably complex penises in syntremous diaulic Phallomedusa spp. (Phallomedusidae) are used exclusively for sperm transfer during reciprocal copulation. The phallomedusid penis is structurally unique among gastropods because it is protruded by pivoting around a fixed point rather than extending by eversion, and bears elaborate appendages to improve traction during copulation. The complex and functionally ambiguous distal reproductive structures of Maningrida (Maningrididae) differ from other amphibolids in the arrangement and structure of their prostate and copulatory structures. Genital armature of varying complexity occurs in all amphiboloidean families. There may be a correlation between the absence of a long-term sperm storage structure (spermatheca) and the evolutionary diversification of copulatory structures in these gastropods.

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Main patterns of radula formation and ontogeny in Gastropoda

Vortsepneva

Mikhlina

Kantor

2022

Journal of Morphology

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Gastropoda is morphologically highly variable and broadly distributed group of mollusks. Due to the high morphological and functional diversity of the feeding apparatus gastropods follow a broad range of feeding strategies: from detritivory to highly specialized predation. The feeding apparatus includes the buccal armaments: jaw(s) and radula. The radula comprises a chitinous ribbon with teeth arranged in transverse and longitudinal rows. A unique characteristic of the radula is its continuous renewal during the entire life of a mollusk. The teeth and the membrane are continuously synthesized in the blind end of the radular sac and are shifted forward to the working zone, while the teeth harden and are mineralized on the way. Despite the similarity of the general mechanism of the radula formation in gastropods, some phylogenetically determined features can be identified in different phylogenetic lineages. These mainly concern shape, size, and number of the odontoblasts forming a single tooth. The radular morphology depends on the shape of the formation zone and the morphology of the subradular epithelium. The radula first appears at the pre‐ and posttorsional veliger stages as an invagination of the buccal epithelium of the larval anterior gut. The larval radular sac is lined with uniform undifferentiated cells. Each major phylogenetic lineage is characterized by a specific larval radula type. Thus, the docoglossan radula of Patellogastropoda is characterized by initially three and then five teeth in a transverse row. The larval rhipidoglossan radula has seven teeth in a row with differentiation into central, lateral, and marginal teeth and later is transformed into the adult radula morphology by the addition of lateral and especially marginal teeth. The taenioglossan radula of Caenogastropoda is nearly immediately formed in adult configuration with seven teeth in a row.

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Taxonomy and anatomy of Amphiboloidea (Gastropoda: Heterobranchia: Archaeopulmonata)

Cited by 19 publications

References 0 publications

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

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

Novel copulatory structures and reproductive functions in Amphiboloidea (Gastropoda, Heterobranchia, Pulmonata)

Main patterns of radula formation and ontogeny in Gastropoda

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