File:Hoplitaspis hiawathai 10.png
Hoplitaspis_hiawathai_10.png (785 × 523 pixels, file size: 844 KB, MIME type: image/png)
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editDescriptionHoplitaspis hiawathai 10.png |
English: Hoplitaspis hiawathai, almost complete specimens preserving details of the prosomal appendages and genital appendage. a UWGM 1840, three specimens preserved in close association. UWGM 1840A (left) is an almost complete specimen showing the prosomal appendages, a groove down the center of the buckler that may represent the midline between opercula, and a postabdomen with a notch that may represent the anus on the twelfth segment. UWGM 1840B (center) preserves a complete opisthosoma including the telson, while UWGM 1840C (right) shows the buckler ventral plate and prosomal appendage VI. Details of the broad paddle morphology of appendage VI are shown in expanded boxes. b UWGM 1875 (paratype), specimen in dorsal view showing prosomal appendages and opisthosoma. The dark outline of a possible genital appendage is preserved under the buckler tergites and shown in detail in an expanded box. VI-5–VI-8 = appendage VI podomeres 5–8. Scale bars = 10 mm, with the exception of the expanded boxes, where the scale bars = 1 mm |
Date | |
Source | Lamsdell, James C.; Gunderson, Gerald O.; Meyer, Ronald C. (2019). "A common arthropod from the Late Ordovician Big Hill Lagerstätte (Michigan) reveals an unexpected ecological diversity within Chasmataspidida". BMC Evolutionary Biology. 19 (8). doi:10.1186/s12862-018-1329-4. |
Author | James C. Lamsdell, Gerald O. Gunderson and Ronald C. Meyer |
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