دورية أكاديمية
A common arthropod from the Late Ordovician Big Hill Lagerstätte (Michigan) reveals an unexpected ecological diversity within Chasmataspidida.
| العنوان: | A common arthropod from the Late Ordovician Big Hill Lagerstätte (Michigan) reveals an unexpected ecological diversity within Chasmataspidida. |
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| المؤلفون: | Lamsdell JC; Department of Geology and Geography, West Virginia University, 98 Beechurst Avenue, Brooks Hall, Morgantown, WV, 26501, USA. james.lamsdell@mail.wvu.edu., Gunderson GO; Middleton, USA., Meyer RC; Louiseville, USA. |
| المصدر: | BMC evolutionary biology [BMC Evol Biol] 2019 Jan 08; Vol. 19 (1), pp. 8. Date of Electronic Publication: 2019 Jan 08. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: BioMed Central Country of Publication: England NLM ID: 100966975 Publication Model: Electronic Cited Medium: Internet ISSN: 1471-2148 (Electronic) Linking ISSN: 14712148 NLM ISO Abbreviation: BMC Evol Biol Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: London : BioMed Central, [2001- |
| مواضيع طبية MeSH: | Biodiversity*, Arthropods/*classification, Animals ; Fossils ; Michigan ; Phenotype ; Phylogeny ; Principal Component Analysis ; Time Factors |
| مستخلص: | Background: Chasmataspidids are a rare group of chelicerate arthropods known from 12 species assigned to ten genera, with a geologic range extending from the Ordovician to the Devonian. The Late Ordovician (Richmondian) fauna of the Big Hill Lagerstätte includes a new species of chasmataspidid represented by 55 specimens. This taxon is only the second chasmataspidid described from the Ordovician and preserves morphological details unknown from any of the previously described species. Results: The new chasmataspidid species is described as Hoplitaspis hiawathai gen. et sp. nov.. Comparison with all other known chasmataspidids indicates that Hoplitaspis occupies an intermediate morphological position between the Ordovician Chasmataspis and the Silurian-Devonian diploaspidids. While the modification of appendage VI into a broad swimming paddle allies Hoplitaspis to the Diploaspididae, the paddle lacks the anterior 'podomere 7a' found in other diploaspidids and shows evidence of having been derived from a Chasmataspis-like chelate appendage. Other details, such as the large body size and degree of expression of the first tergite, show clear affinities with Chasmataspis, providing strong support for chasmataspidid monophyly. Conclusions: The large body size and well-developed appendage armature of Hoplitaspis reveals that chasmataspidids occupied a greater breadth of ecological roles than previously thought, with the abundance of available specimens indicating that Hoplitaspis was an important component of the local community. The miniaturization and ecological limiting of diploaspidids potentially coincides with the major radiation of eurypterids and may suggest some degree of competition between the two groups. The geographic distribution of chasmataspidid species suggests the group may have originated in Laurentia and migrated to the paleocontinents of Baltica and Siberia as tectonic processes drew the paleocontinents into close proximity. |
| التعليقات: | Erratum in: BMC Ecol Evol. 2021 Jun 7;21(1):112. (PMID: 34098866) |
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| فهرسة مساهمة: | Keywords: Big Hill; Chasmataspidida; Chelicerata; Diploaspididae; Hoplitaspis; Lagerstätte; Microtergite; Ordovician; Podomere 7a; Swimming paddle |
| تواريخ الأحداث: | Date Created: 20190110 Date Completed: 20190408 Latest Revision: 20231005 |
| رمز التحديث: | 20231215 |
| مُعرف محوري في PubMed: | PMC6325806 |
| DOI: | 10.1186/s12862-018-1329-4 |
| PMID: | 30621579 |
| قاعدة البيانات: | MEDLINE |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 1471-2148 |
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| DOI: | 10.1186/s12862-018-1329-4 |