Topic
Terebra
About: Terebra is a research topic. Over the lifetime, 27 publications have been published within this topic receiving 230 citations.
Papers
TL;DR: The conoidean family Terebridae is an intriguing lineage of marine gastropods, which are of considerable interest due to their varied anatomy and complex venoms, and the use of DNA-based diagnoses is proposed to provide a comprehensive revision of the group.
Abstract: The conoidean family Terebridae is an intriguing lineage of marine gastropods, which are of considerable interest due to their varied anatomy and complex venoms. Terebrids are abundant, easily recognizable and widely distributed in tropical and subtropical waters, but our findings have demonstrated that their systematics requires revision. Here we elaborate the classification of Terebridae based on a recently published molecular phylogeny of 154 species, plus characters of the shell and anterior alimentary system. The 407 living species of the family, including seven species described herein, are assigned to three subfamilies: Pellifroniinae new subfamily, Pervicaciinae and Terebrinae. The Pellifroniinae comprises five deep-water species in two genera, Pellifronia and Bathyterebra n. gen. Pellifroniinae possess a radula of duplex marginal teeth, well-developed proboscis and venom gland, and a very small rhynchodeal introvert. The Pervicaciinae includes c. 50 species in the predominantly Indo-Pacific genera Duplicaria and Partecosta. Pervicaciinae possess salivary glands, a radula of solid recurved marginal teeth and a weakly developed rhynchodeal introvert, but lack proboscis and venom gland. The remaining Terebridae species are classified into 15 genera in the subfamily Terebrinae (including four genera described herein); nine genera are defined on the basis of phylogenetic data and six solely on shell morphology. The Indo-Pacific genera Profunditerebra n. gen., Maculauger n. gen. and Myurellopsis n. gen. each include about a dozen species. The first is restricted to the deep waters of the Indo-West Pacific, while the latter two range widely in both geographic and bathymetric distribution. Neoterebra n. gen. encompasses about 65 species from a range of localities in the eastern Pacific, Caribbean, and Atlantic, and from varying depths. To characterize the highly diversified genera Terebra, Punctoterebra, Myurella and Duplicaria, each of which comprise several morphological clusters, we propose the use of DNA-based diagnoses. These diagnoses are combined with more informative descriptions to define most of the supraspecific taxa of Terebridae, to provide a comprehensive revision of the group.
64 citations
TL;DR: The first molecular phylogeny for the Terebridae is reported and it is indicated that most of the genera of terebrids are polyphyletic, and one species (“Terebra” (s.l.) jungi) is the sister group to all other terebrid species.
Abstract: Toxoglossate marine gastropods, traditionally assigned to the families Conidae, Terebridae, and Turridae, are one of the most populous animal groups that use venom to capture their prey. These marine animals are generally characterized by a venom apparatus that consists of a muscular venom bulb and a tubular venom gland. The toxoglossan radula, often compared with a hypodermic needle for its use as a conduit to inject toxins into prey, is considered a major anatomical breakthrough that assisted in the successful initial radiation of these animals in the Cretaceous and early Tertiary. The pharmacological success of toxins from cone snails has made this group a star among biochemists and neuroscientists, but very little is known about toxins from the other Toxoglossa, and the phylogeny of these families is largely in doubt. Here we report the first molecular phylogeny for the Terebridae and use the results to infer the evolution of the venom apparatus for this group. Our findings indicate that most of the genera of terebrids are polyphyletic, and one species (“Terebra” (s.l.) jungi) is the sister group to all other terebrids. Molecular analyses combined with mapping of venom apparatus morphology indicate that the Terebridae have lost the venom apparatus at least twice during their evolution. Species in the genera Terebra and Hastula have the typical venom apparatus found in most toxoglossate gastropods, but all other terebrid species do not. For venomous organisms, the dual analysis of molecular phylogeny and toxin function is an instructive combination for unraveling the larger questions of phylogeny and speciation. The results presented here suggest a paradigm shift in the current understanding of terebrid evolution, while presenting a road map for discovering novel terebrid toxins, a largely unexplored resource for biomedical research and potential therapeutic drug development.
41 citations
TL;DR: The total number of animals, biomass as well as the domanance of T. terebra in the community decreased, while species diversity increased along a gradient of increasing salinity and decreasing siltclay fraction of the sediment.
Abstract: A one year study was carried out to investigate the variations in benthic community structure along an environmental gradient of salinity and bottom substratum in a sub-tropical estuary in Hong Kong. The community was dominated by the gastropod Turritella terebra, and to a lesser extent, by the gastropod Murex trapa and the crab Portunus hastatoides. The total number of animals, biomass as well as the domanance of T. terebra in the community decreased, while species diversity increased along a gradient of increasing salinity and decreasing siltclay fraction of the sediment.
19 citations
1 Jan 2008
TL;DR: It was revealed that this species has been described earlier from Northern Siberia by WESTERLUND (1885) under the name Limnaea palustris var.
Abstract: > Abstract The fi ndings of the Palaearctic stagnicoline (Pulmonata: Lymnaeidae) species Catascopia occulta from Eastern Siberia de- scribed by JACKIEWICZ (1992, 1998b) are critically reconsidered. It was revealed that this species has been described earlier from Northern Siberia by WESTERLUND (1885) under the name Limnaea palustris var. terebra. The latter name is available and has nomenclatorial priority before Galba occulta Jackiewicz. The shells from Sweden and Russian malacological col- lections determined by Westerlund himself as L. palustris var. terebra were examined, however none of these could with certainity be identifi ed as being the series. On absence of the type materials, the neotype of L. palustris var. terebra is desig- nated. The geographic range of the species Catascopia terebra (= Galba occulta) syn. n. is mapped. It is much more common in Siberia than in Europe where the species inhabits a restricted area only. > Kurzfassung Taxonomische Anmerkungen zu euro-sibirischen Suswassermollusken. 3. Galba occulta Jackiewicz, 1959 ist ein jun- geres Synonym von Limnaea palustris var. terebra Westerlund, 1855. - Die Nachweise der palaarktischen stagnicolen (Pulmonata: Lymnaeidae) Art Catascopia occulta aus Ost-Sibirien, beschrieben von JACKIEWICZ (1992, 1998b), wurden kritisch uberpruft. Es zeigte sich, dass diese Art von WESTERLUND (1885) aus Nord-Sibirien bereits fruher unter dem Na- men Limnaea palustris var. terebra beschrieben wurde. Dieser Name ist verfugbar und hat nomenklatorische Prioritat vor Galba occulta Jackiewicz. Keines der Gehause aus schwedischen und russischen malakologischen Sammlungen, die von Westerlund personlich bestimmt wurden, konnten mit Sicherheit der Typusserie zugeordnet werden. Da kein Typusmaterial verfugbar ist, wird hier ein Neotypus fur L. palustris var. terebra designiert. Die geographische Verbreitung der Art Cata- scopia terebra (= Galba occulta) syn. n. wird in einer Verbreitungskarte dargestellt. Sie ist in Sibirien sehr viel haufi ger als in Europa, wo diese Art nur ein begrenztes Gebiet besiedelt.
18 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2019 | 1 |
| 2018 | 2 |
| 2017 | 1 |
| 2016 | 1 |
| 2009 | 1 |
| 2008 | 2 |