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Yi Yang, Qi Li, Lingfeng Kong, Hong Yu
The mitochondrial genome provides sets of genome-level characteristics, which can be useful in resolving ancient relationships. The complete mitochondrial genomes of five Reticunassa and one Nassarius were sequenced, including Reticunassa hiradoensis, R. fratercula, R. festiva complex A, B and C and Nassarius variciferus, and compared with other two Nassariidae species (Tritia reticulatus and T. obsolete). Eight genomes show the same gene order as in other caenogastropods, containing 13 protein-coding genes, 2 ribosome RNA genes and 22 transfer RNA genes, except R...
April 5, 2018: Gene
Ellen E Strong, Lee Ann Galindo, Yuri I Kantor
The genus Clea from SE Asia is from one of only two unrelated families among the megadiverse predatory marine Neogastropoda to have successfully conquered continental waters. While little is known about their anatomy, life history and ecology, interest has grown exponentially in recent years owing to their increasing popularity as aquarium pets. However, the systematic affinities of the genus and the validity of the included species have not been robustly explored. Differences in shell, operculum and radula characters support separation of Clea as presently defined into two distinct genera: Clea, for the type species Clea nigricans and its allies, and Anentome for Clea helena and allies...
2017: PeerJ
Samuel Abalde, Manuel J Tenorio, Carlos M L Afonso, Rafael Zardoya
Cone snails attain in Senegal one of their highest peaks of species diversity throughout the continental coast of Western Africa. A total of 15 endemic species have been described, all placed in the genus Lautoconus. While there is ample data regarding the morphology of the shell and the radular tooth of these species, virtually nothing is known regarding the genetic diversity and phylogenetic relationships of one of the most endangered groups of cones. In this work, we determined the complete or near-complete (only lacking the control region) mitochondrial (mt) genomes of 17 specimens representing 11 endemic species (Lautoconus belairensis, Lautoconus bruguieresi, Lautoconus cacao, Lautoconus cloveri, Lautoconus cf...
July 2017: Molecular Phylogenetics and Evolution
Enate A Helwerda
Six species of Conidae and seven species of Terebridae are reported from the Plio-Pleistocene "Cabarruyan" fauna of Pangasinan, the Philippines. Eleven species are identified; these species all occur in the Recent Indo-Pacific fauna and seven of these are previously known from the fossil record as well. The species composition of this fauna shows little overlap with other fossil assemblages, except with the Fijian fossil assemblage. This is attributed to a lack of knowledge on Indo-pacific fossil faunas as well as to the relatively deep water setting (200-300 m) of this fauna...
January 20, 2017: Zootaxa
Juan Francisco Araya, Ricardo Catalán, Juan Antonio Aliaga
Marine mollusks from northern Chile and from the Región de Atacama in particular have been sparsely documented, and only a few works have reviewed the area (see Araya & Araya, 2015; Labrín et al. 2015; Araya & Valdés 2016). Mollusks from deep water and offshore areas are one of the least known groups and, apart from some classic works from the 19th century, only McLean (1970), Bernard (1983), Véliz and Vásquez (2000), Fraussen & Haddorn (2000), Houart (2003), Vilvens & Sellanes (2010), and Araya (2013) have included deep-water molluscan species from northern Chile...
July 19, 2016: Zootaxa
Huijuan Li, Jianjie Fu, Aiqian Zhang, Qinghua Zhang, Yawei Wang
As a candidate persistent organic pollutant of the Stockholm Convention, short-chain chlorinated paraffins (SCCPs) have recently received particular attention. In this study, we investigated, for the first time, the concentrations of SCCPs in biota samples collected from the Fildes Peninsula at King George Island and Ardley Island, Antarctica. The concentrations of SCCPs ranged from 3.5 to 256.6ng/g (dry weight, dw), with a mean of 76.6±61.8ng/g dw, which was lower than those detected in mid- and low-latitude regions...
September 2016: Environment International
Chia-Hsuan Sung, Chen-Te Tseng, Liang-Jong Wang, Yu-Chi Li, Jenn-Kan Lu
The complete mitochondrial genome sequence of the Babylonia borneensis is reported for the first time in this study. The length of genome was 15 556 bp, including 13 protein-coding genes, 2 ribosomal RNA genes and 22 transfer RNA genes. The nucleotide composition of the mitogenome showed AT-rich feature, with the AT content of 68.2%. Comparison of the identity of the B. borneensis mitogenome with B. areolata, B. lani and B. lutosa was 87.5%, 87.4% and 86.9%, respectively. The construction of phylogenetic tree showed high bootstrap support value...
September 2016: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
Diogo R Couto, Philippe Bouchet, Yuri I Kantor, Luiz R L Simone, Gonzalo Giribet
The neogastropod family Fasciolariidae Gray, 1853 - tulips, horse-conchs, spindles, etc., comprises important representatives of tropical and subtropical molluscan assemblages, with over 500 species in the subfamilies Fasciolariinae Gray, 1853, Fusininae Wrigley, 1927 and Peristerniinae Tryon, 1880. Fasciolariids have had a rather complicated taxonomical history, with several genus names for a long time used as waste baskets to group many unrelated species; based on shell characters, recent taxonomic revisions have, however, began to set some order in its taxonomy...
June 2016: Molecular Phylogenetics and Evolution
Andrey A Prudkovsky, Viatcheslav N Ivanenko, Mikhail A Nikitin, Konstantin A Lukyanov, Anna Belousova, James D Reimer, Michael L Berumen
Green Fluorescent Proteins (GFPs) have been reported from a wide diversity of medusae, but only a few observations of green fluorescence have been reported for hydroid colonies. In this study, we report on fluorescence displayed by hydroid polyps of the genus Cytaeis Eschscholtz, 1829 (Hydrozoa: Anthoathecata: Filifera) found at night time in the southern Red Sea (Saudi Arabia) living on shells of the gastropod Nassarius margaritifer (Dunker, 1847) (Neogastropoda: Buccinoidea: Nassariidae). We examined the fluorescence of these polyps and compare with previously reported data...
2016: PloS One
Barbara Eckmair, Chunsheng Jin, Daniel Abed-Navandi, Katharina Paschinger
Various studies in the past have revealed that molluscs can produce a wide range of rather complex N-glycan structures, which vary from those occurring in other invertebrate animals; particularly methylated glycans have been found in gastropods, and there are some reports of anionic glycans in bivalves. Due to the high variability in terms of previously described structures and methodologies, it is a major challenge to establish glycomic workflows that yield the maximum amount of detailed structural information from relatively low quantities of sample...
February 2016: Molecular & Cellular Proteomics: MCP
Alexander B Doweld
The genus Granulina (type species Plasmoporella granulosa Bondarenko, 1958, by original designation) was established by Leleshus (1975: 7) for a distinctive heliolitoid genus from the Upper Ordovician of Kazakhstan and Tajikistan. However, the name Granulina Jousseaume, 1888 (p. 191), which designates a genus of a living molluscs (Gastropoda: Neogastropoda: Marginellidae: Granulininae), has priority over the fossil generic name, which is its junior homonym.
July 21, 2015: Zootaxa
David Osca, José Templado, Rafael Zardoya
In order to further resolve the phylogenetic relationships within Caenogastropoda, the complete mitochondrial (mt) genomes of Cochlostoma hidalgoi (Cyclophoroidea), Naticarius hebraeus (Naticoidea), Galeodea echinophora (Tonnoidea), and Columbella adansoni (Buccinoidea), and the partial mt genome of Erosaria spurca (Cypraeoidea) were sequenced. All newly determined mt genomes conformed to the consensus gene order of caenogastropods, except that of C. hidalgoi, which differed in the relative positions of the trnD, trnQ, trnG, trnY, and trnT genes...
December 2015: Molecular Phylogenetics and Evolution
Po-Wei Chen, Sheng-Tai Hsiao, Chih-Wei Huang, Kao-Sung Chen, Chen-Te Tseng, Wen-Lung Wu, Deng-Fwu Hwang
The complete mitogenome sequence of the cone snail Conus tulipa (Linnaeus, 1758) has been sequenced by next-generation sequencing method. The assembled mitogenome is 16,599 bp in length, including 13 protein-coding genes, 22 transfer RNA genes and 2 ribosomal RNA genes. The overall base composition of C. tulipa is 28.7% A, 15.2% C, 18.4% G and 37.7% T. It shows 81.1% identity to the cone snail C. consors, 78.5% to C. borgesi and 77.5% to C. textile. Using the 13 protein-coding genes and 2 ribosomal RNA genes of C...
July 2016: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
Maria Vittoria Modica, Fabrizio Lombardo, Paolo Franchini, Marco Oliverio
BACKGROUND: Hematophagy arose independently multiple times during metazoan evolution, with several lineages of vampire animals particularly diversified in invertebrates. However, the biochemistry of hematophagy has been studied in a few species of direct medical interest and is still underdeveloped in most invertebrates, as in general is the study of venom toxins. In cone snails, leeches, arthropods and snakes, the strong target specificity of venom toxins uniquely aligns them to industrial and academic pursuits (pharmacological applications, pest control etc...
2015: BMC Genomics
Silvio Felipe Barbosa Lima, Carmen Regina Parisotto Guimarães
No abstract text is available yet for this article.
April 29, 2015: Zootaxa
Jonathan A Todd, Timothy A Rawlings
The Polystira clade (here comprising Polystira and Pleuroliria) is a poorly known but hyper-diverse clade within the neogastropod family Turridae (sensu stricto). It has extensively radiated within the tropics and subtropics of the Americas, to which it is endemic. In this paper we present a synthetic overview of existing information on this radiation together with new information on estimated species diversity, systematic relationships, a species-level molecular phylogenetic analysis and preliminary macroecological and diversification analyses, to serve as a platform for further study...
2014: Zootaxa
Gianluca Polgar, Tsung Fei Khang, Teddy Chua, David J Marshall
The relationship between acute thermal tolerance and habitat temperature in ectotherm animals informs about their thermal adaptation and is used to assess thermal safety margins and sensitivity to climate warming. We studied this relationship in an equatorial freshwater snail (Clea nigricans), belonging to a predominantly marine gastropod lineage (Neogastropoda, Buccinidae). We found that tolerance of heating and cooling exceeded average daily maximum and minimum temperatures, by roughly 20°C in each case...
January 2015: Journal of Thermal Biology
J Alistair Crame, Alan G Beu, Jon R Ineson, Jane E Francis, Rowan J Whittle, Vanessa C Bowman
The extensive Late Cretaceous - Early Paleogene sedimentary succession of Seymour Island, N.E. Antarctic Peninsula offers an unparalleled opportunity to examine the evolutionary origins of a modern polar marine fauna. Some 38 modern Southern Ocean molluscan genera (26 gastropods and 12 bivalves), representing approximately 18% of the total modern benthic molluscan fauna, can now be traced back through at least part of this sequence. As noted elsewhere in the world, the balance of the molluscan fauna changes sharply across the Cretaceous - Paleogene (K/Pg) boundary, with gastropods subsequently becoming more diverse than bivalves...
2014: PloS One
Yuri Kantor, Pierre Lozouet, Nicolas Puillandre, Philippe Bouchet
Most neogastropod families have a continuous record from the Cretaceous or Paleogene to the Recent. However, the fossil record also contains a number of obscure nominal families with unusual shell characters that are not adequately placed in the current classification. Some of these are traditionally regarded as valid, and some have been "lost" in synonymy. One such "lost" family is the Pyramimitridae, established by Cossmann in 1901 for the Eocene genus Pyramimitra, and currently included in the synonymy of Buccinidae...
2014: Zootaxa
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