Chondroteuthis wunnenbergi Bode, 1933
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publication ID |
https://doi.org/10.1186/s13358-023-00285-3 |
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persistent identifier |
https://treatment.plazi.org/id/F56A87A8-FF2B-FFE4-55F5-9D17FC76FD87 |
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treatment provided by |
Felipe |
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scientific name |
Chondroteuthis wunnenbergi Bode, 1933 |
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Chondroteuthis wunnenbergi Bode, 1933
( Figs. 5 View Fig , 6 View Fig )
Specimen BGR MA 13436 (described in Hoffmann et al., 2017, specimen two therein).
Stratigraphy Posidonia Shale, Falciferum Zone, Toarcian, Early Jurassic.
Locality Hondelage near Brunswick, northern Germany.
Description of arm crown Te specimen is complete and preserves the rostrum and phragmocone remains, imprints of parts of the proostracum, the ink sac with ink duct ( Fig. 5 View Fig ) and a complete arm crown ( Fig. 6 View Fig ). Te entire specimen measures 170 mm from the apex of the rostrum to the tip of the arms. Te arms are quite slender and up to 60 mm long. About 190 arm hooks are discernible, ranging between 0.2 and 3 mm in length, with the largest hooks in the middle of the arms. Typical for this taxon, the hooks are arranged in a single row (instead of biserial rows) and belong to four different hook morphotypes (see Hoffmann et al., 2017). Te distal arm hooks appear to be missing, which is likely a taphonomic artefact. Te larger hooks have a broad base and a long uncinus. Tese are visible in the overview photograph ( Fig. 5 View Fig ), though to enhance the contrast, another more detailed photograph was taken and inverted to obtain a negative image of the arm crown. Tis shows a set of pale stripes associated with the arm hook-series that likely represent faint remains of the arms. Within these faint outlines, light grey lines ( Fig. 5 View Fig , dark in Fig. 6a View Fig and light yellow in Fig. 6b View Fig ) are visible, which can be traced from the base to the tip in some of the arms. In total, 10 arm traces could be identified, but only nine of which display the more distinct finer internal line. Te arms seem aligned in two bundles. Between the bases of these two bundles, an oblique connecting line is visible (intrabrachial commissure in Fig. 6b View Fig ).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.