Isaac Lea's (1792–1886) Substitutions and Other Modifications of His Own Names of Molluscan Species

Malacologia ◽  
2021 ◽  
Vol 64 (1) ◽  
Author(s):  
Rüdiger Bieler
Keyword(s):  
Molluscan Species

James Thomas Marshall's correspondence (1887–1895) with Scotland's Alexander Somerville: practical, personal and controversial matters in conchology

2009 ◽  
Vol 36 (1) ◽  
pp. 4-25 ◽  
Author(s):  
P. G. MOORE
Keyword(s):  
Nineteenth Century ◽  
Taxonomic Revision ◽  
Marine Science ◽  
The One ◽  
Clyde Sea ◽  
Sea Area ◽  
Molluscan Species

Attention is drawn to the one side remaining of a nineteenth-century correspondence addressed to Alexander Somerville that is housed in the archives of the Scottish Association for Marine Science at Oban, concerning conchological matters. Previously unstudied letters from James Thomas Marshall shed new light on the practicalities of offshore dredging by nineteenth-century naturalists in the Clyde Sea Area; on personalities within conchology; on the controversies that raged among the conchological community about the production of an agreed list of British molluscan species and on the tensions between conchology and malacology. In particular, the criticism of Canon A. E. Norman's ideas regarding taxonomic revision of J. G. Jeffreys's British conchology, as expressed by Marshall, are highlighted.

Molluscan biostratigraphy of the lower River Bend Formation at the Martin Marietta Quarry, New Bern, North Carolina

1991 ◽  
Vol 65 (1) ◽  
pp. 80-118 ◽  
Author(s):  
Thomas J. Rossbach ◽  
Joseph G. Carter
Keyword(s):  
North Carolina ◽  
Coastal Plain ◽  
Warm Water ◽  
Gulf Coastal Plain ◽  
Generic Level ◽  
Evolutionary Transitions ◽  
Molluscan Fauna ◽  
Molluscan Diversity ◽  
Molluscan Species ◽  
River Bend

The lower River Bend Formation at the Martin Marietta New Bern quarry in Craven County, North Carolina, contains a diverse and abundant moldic molluscan fauna. This fauna, reconstructed by latex casts, suggests a Vicksburgian or a post-Vicksburgian, pre-Chickasawhayan age for the New Bern exposure. Forty-one molluscan species and subspecies are presently identified from the lower River Bend Formation, 11 of which are new: Turritella caelatura alani, Turritella neusensis, Galeodaria britti, Phalium newbernensis, Cymatium planinodum, Oocorys vadosus, Ecphora wheeleri, Lyria concinna, Scaphella saintjeani, Turricula (Orthosurcula) aequa, and Lucina (Stewartia) micraulax. This fauna is virtually identical at the generic level and similar at the species level to the Vicksburgian faunas of the Gulf Coastal Plain. About 37 percent of the New Bern species also occur in the Vicksburgian of Mississippi, although many of these species reach considerably larger sizes at New Bern. Apparent evolutionary transitions between previously known Vicksburgian and Chickasawhayan mollusks suggest a time of deposition intermediate between these two Oligocene stages.Moderately high molluscan diversity, the abundance of characteristically warm-water genera, and associated carbonate-rich sediments suggest that the lower River Bend Formation represents a subtropical, open-marine, predominantly carbonate environment immediately seaward of a nearshore lagoonal or barrier island complex.The lower River Bend Formation at New Bern differs faunally, climatically, and sedimentologically from the upper River Bend Formation in quarry exposures near Belgrade, North Carolina. The upper River Bend Formation contains a lower diversity molluscan fauna with marked dominance diversity and few warm-water taxa. It represents a slightly cooler nearshore, open-marine environment in a transitional siliciclastic-carbonate sedimentary regime. The considerable taxonomic and sedimentologic differences between the lower and upper parts of the River Bend Formation corroborate microfossil evidence suggesting that they represent temporally distinct depositional cycles.

Die Molluskenfauna zwischen Friedland und den Brohmer Bergen (Mecklenburg-Vorpommern) – ein Exkursionsbericht

2020 ◽  
Vol 57 ◽  
pp. 64-71
Author(s):  
Ulrich Meßner ◽  
Holger Menzel-Harloff und Michael L. Zettler
Keyword(s):  
Working Group ◽  
Field Trip ◽  
Freshwater Species ◽  
The City ◽  
Molluscan Species

Das 39. Kartierungstreffen der Arbeitsgruppe Malakologie Mecklenburg-Vorpommern konzentrierte sich auf die Landschaft östlich der Stadt Friedland, wo bisher eine besonders lückenhafte Datenlage bestand. Es wurden insgesamt 92 Molluskenarten nachgewiesen, davon 55 Land- und 37 Süßwasserarten. The mollusc fauna between Friedland and the Brohmer Berge (Mecklenburg-Western Pomerania): a field trip report The 39th mapping meeting of the malacology working group in Mecklenburg-Western Pomerania focused on the landscape east of the city of Friedland as data available from this area had been particularly scarce. Altogether 92 molluscan species were detected, 55 of them being land species and 37 freshwater species.

Distribution Patterns of Opportunistic Molluscan Species in Korean Waters

2013 ◽  
Vol 31 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Jin-Young Seo ◽  
◽  
Jun-Sang Lee ◽  
Jin-Woo Choi
Keyword(s):  
Distribution Patterns ◽  
Korean Waters ◽  
Molluscan Species

VII.—On Hindeastræa, a New Generic Form of Cretaceous Astræidæ

1888 ◽  
Vol 5 (8) ◽  
pp. 362-364 ◽  
Author(s):  
Charles A. White
Keyword(s):  
Gulf Of Mexico ◽  
Molluscan Species

The little Coral here described was discovered in Kaufman County, Texas, in strata of the Kipley Group, by Dr. R. H. Loughridge, and presented by him to me, together with a few characteristic molluscan species of that group which he found associated with it. The Ripley Group is the uppermost division of the Cretaceous series in the States which border upon the Gulf of Mexico; and probably represents approximately the Upper Chalk of England. Regarding it as a new generic form I herewith give a diagnosis and figures of it; and being the only species known to me, the diagnosis is necessarily based upon this alone.

Marine alien Mollusca in Italy: a critical review and state of the knowledge

2012 ◽  
Vol 92 (6) ◽  
pp. 1357-1365 ◽  
Author(s):  
Fabio Crocetta
Keyword(s):  
Critical Review ◽  
Adriatic Sea ◽  
First Record ◽  
Extensive Literature ◽  
Tyrrhenian Sea ◽  
Ionian Sea ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
Definition Of ◽  
Molluscan Species

The state of the knowledge about the marine alien molluscan species from Italy is provided based on a critical review of records compiled from an extensive literature survey and from unpublished data obtained from 2005 to 2010. Based on the IUCN definition of ‘alien’, 35 molluscan taxa (18 Gastropoda, 16 Bivalvia and 1 Cephalopoda) are reported here, for each of which the following data (collected up to December 2010) are provided: published and unpublished records from the coastal and offshore territorial seawaters of Italy, including lagoons, within the 14 biogeographical sea divisions covering the Italian shores, date of first record, most plausible vector(s) of introduction and establishment status. The southern Ionian Sea, the northern Adriatic Sea and the eastern-central Tyrrhenian Sea resulted to be the areas most affected by alien molluscan introductions. The rate of records of new alien species (evaluated on the basis of live findings) is quite uniform over five decades, with six to eight species recorded per decade. The analysis of the vectors showed shipping/maritime transport to be the most common vector of introduction (40%), followed by trade (24%). Nineteen alien molluscan species (54%) were considered as established in Italy.

scholarly journals Eumelanin and pheomelanin pigmentation in mollusc shells may be less common than expected: insights from mass spectrometry

2019 ◽  
Vol 16 (1) ◽  
Author(s):  
Susanne Affenzeller ◽  
Klaus Wolkenstein ◽  
Holm Frauendorf ◽  
Daniel J. Jackson
Keyword(s):  
High Performance ◽  
Molecular Mechanisms ◽  
Visible Spectrum ◽  
Mass Spectrometric ◽  
Marine Gastropods ◽  
Nautilus Pompilius ◽  
Geometric Patterns ◽  
False Positive Identification ◽  
Chemical Studies ◽  
Molluscan Species

Abstract Background The geometric patterns that adorn the shells of many phylogenetically disparate molluscan species are comprised of pigments that span the visible spectrum. Although early chemical studies implicated melanin as a commonly employed pigment, surprisingly little evidence generated with more recent and sensitive techniques exists to support these observations. Results Here we present the first mass spectrometric investigations for the presence of eumelanin and pheomelanin in 13 different molluscan species from three conchiferan classes: Bivalvia, Cephalopoda and Gastropoda. In the bivalve Mytilus edulis we demonstrate that eumelanin mainly occurs in the outermost, non-mineralised and highly pigmented layer of the shell (often referred to as the periostracum). We also identified eumelanin in the shells of the cephalopod Nautilus pompilius and the marine gastropods Clanculus pharaonius and Steromphala adriatica. In the terrestrial gastropod Cepaea nemoralis we verify the presence of pheomelanin in a mollusc shell for the first time. Surprisingly, in a large number of brown/black coloured shells we did not find any evidence for either type of melanin. Conclusions We recommend methods such as high-performance liquid chromatography with mass spectrometric detection for the analysis of complex biological samples to avoid potential false-positive identification of melanin. Our results imply that many molluscan species employ as yet unidentified pigments to pattern their shells. This has implications for our understanding of how molluscs evolved the ability to pigment and pattern their shells, and for the identification of the molecular mechanisms that regulate these processes.

XVIII.—Records of Potamopyrgus jenkinsi (Smith) in Scottish Fresh Waters over Fifty Years (1906–56)

1957 ◽  
Vol 66 (4) ◽  
pp. 360-373 ◽  
Author(s):  
W. Russell Hunter ◽  
T. Warwick
Keyword(s):  
West Coast ◽  
The West ◽  
England And Wales ◽  
Fresh Waters ◽  
Rate Of Spread ◽  
Outer Hebrides ◽  
Molluscan Species ◽  
Potamopyrgus Jenkinsi

SynopsisThis note presents in summary the recorded occurrences of Potamopyrgus jenkinsi (Smith) in fresh waters in Scotland over the fifty years since it was first reported. Apart from isolated occurrences in the Outer Hebrides, in the Caithness-Orkney area, and in the Borders—Solway area, the records appear to reflect a gradual dispersal (1906—56) from an origin on the Tay, over the Tay and Forth drainage areas, and thence perhaps through the Midland Valley to the west coast. This dispersal has been slower than the rate of spread of the same species through England and Wales earlier in the century, but has been rapid compared with the rates of dispersal assumed for other molluscan species.

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