On The Biology Of <i>Glossus Humanus</i> (L.) <i>(Isocardia Cor</i> Lam.)

Owen, G.

doi:10.1017/s0025315400011449

Cited by 58 publications

(31 citation statements)

References 18 publications

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“…The unusual abundance or size of Glossus humanus and its proximity to large bones at two sites (W1, W8) might point to its special adaptation to high sulphide concentrations. However, the only available study on the biology and diet of this taxon (Owen ), adapted to very soft and calm mud bottoms, does not support this hypothesis. Nassariidae, found at three sites (W1, W3, W20), and abundant in some cases, are scavengers that might have fed directly on the whale flesh, as observed in modern examples (Glover et al .…”

Section: Discussionmentioning

confidence: 92%

A record of fossil shallow-water whale falls from Italy

Danise

Dominici²

2014

LET

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Twenty‐five Neogene–Quaternary whales hosted in Italian museum collections and their associated fauna were analysed for evidence of whale‐fall community development in shallow‐water settings. The degree of bone articulation, completeness of the skeleton and lithology of the embedding sediments were used to gather information on relative water depth, water energy, sedimentation rate and overall environmental predictability around the bones. Shark teeth and hard‐shelled invertebrates with a necrophagous diet in close association with the bones were used as evidence of scavenging. Fossil bone bioerosion, microbially mediated cementation and other mollusc shells in the proximity of the remains informed on past biological activity around the bones. The results are consistent with the hypothesis that shallow‐water whale falls differ from their deep‐water counterparts. Taphonomic pathways are more variable on the shelf and whale carcasses may not go through all steps of the ecological succession as recognised in the deep sea. Whilst the mobile scavenger and the enrichment opportunistic stages are well represented, chemosynthetic taxa typical of the sulphophilic stage were recovered only in one instance. The presence of a generalist fauna among the suspension feeding bivalves and carnivorous gastropods, and the extreme rarity of chemosynthetic taxa, suggest that predatory pressure rules out whale‐fall specialists from shallow shelf settings as in analogous cold seep and vent shallow‐water communities.

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Section: Discussionmentioning

confidence: 92%

A record of fossil shallow-water whale falls from Italy

Danise

Dominici²

2014

LET

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“…40 (2) with longitudinal grooves and ridges. This feature was defined as the acceptance tract by Owen (1953), corresponds to the anterodorsal tract of Reid (1965), and is possibly homologous to Sorting Area 5 ('SA 5 ') of Purchon (1960). New character.…”

Section: Alimentary System Characters (Figs 16-18)mentioning

confidence: 99%

Investigating the Bivalve Tree of Life – an exemplar-based approach combining molecular and novel morphological characters

Bieler

Mikkelsen

Collins

et al. 2014

Invert. Systematics

216

211

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Abstract. To re-evaluate the relationships of the major bivalve lineages, we amassed detailed morpho-anatomical, ultrastructural and molecular sequence data for a targeted selection of exemplar bivalves spanning the phylogenetic diversity of the class. We included molecular data for 103 bivalve species (up to five markers) and also analysed a subset of taxa with four additional nuclear protein-encoding genes. Novel as well as historically employed morphological characters were explored, and we systematically disassembled widely used descriptors such as gill and stomach 'types'. Phylogenetic analyses, conducted using parsimony direct optimisation and probabilistic methods on static alignments (maximum likelihood and Bayesian inference) of the molecular data, both alone and in combination with morphological characters, offer a robust test of bivalve relationships. A calibrated phylogeny also provided insights into the tempo of bivalve evolution. Finally, an analysis of the informativeness of morphological characters showed that sperm ultrastructure characters are among the best morphological features to diagnose bivalve clades, followed by characters of the shell, including its microstructure. Our study found support for monophyly of most broadly recognised higher bivalve taxa, although support was not uniform for Protobranchia. However, monophyly of the bivalves with protobranchiate gills was the best-supported hypothesis with incremental morphological and/or molecular sequence data. Autobranchia,

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“…The diagnostic feature of this type of stomach is the extension of the major typhlosole and the intestinal groove into two caeca, one on the right side of the oesophageal orifice and one on the left. It has been suggested that this is typical of the majority of the Eulamellibranchia (Owen, 1953 ;Morton, 1958) but this is not correct. Of all the families of Eulamellibranchia which have been studied in this respect only about one half possess a stomach of Type V, the stomach in the remainder being of Type IV .…”

Section: Stomach Type Vmentioning

confidence: 99%

The Stomach in the Eulamellibranchia; Stomach Types Iv and V

Purchon

1960

Proceedings of the Zoological Society of London

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The internal structure and function of the stomach is described for representatives of twenty‐three families of Eulamellibranchia. The stomachs of two of these are assigned to Stomach Type IV and the remainder to Stomach Type V. A detailed analysis is made of structural variation in the stomach in the twenty‐one families with stomachs of Type V and a definition of Stomach Type V is given. The appendix is limited in its occurrence to the Tellinacea and the Adesmacea, which suggests that these two sub‐orders are closely related to each other. It is concluded that Stomach Type IV is an ancestral character which has persisted to the present time in a large section of the Lamellibranchia; it is suggested that there arose from the ancestral stock a separate phylogeny which is characterized by the possession of Stomach Type V. It is concluded that within the phylogeny that is chara***cterized by Stomach Type V it is possible for the stomach to be simplified and to resume secondarily the ancestral form of Stomach Type IV. This is considered to have occurred in the Sphaeriidae, Lucinidae, Thyasiridae, Donacidae and in Chama multisquamosa.

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On The Biology Of Glossus Humanus (L.) (Isocardia Cor Lam.)

Cited by 58 publications

References 18 publications

A record of fossil shallow-water whale falls from Italy

A record of fossil shallow-water whale falls from Italy

Investigating the Bivalve Tree of Life – an exemplar-based approach combining molecular and novel morphological characters

The Stomach in the Eulamellibranchia; Stomach Types Iv and V

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