Osedacoides jurassicus Karl et al., 2012
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publication ID |
https://doi.org/ 10.26879/1315 |
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persistent identifier |
https://treatment.plazi.org/id/03BE87DE-FFF0-FFFB-9A8A-FCA54108FC00 |
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treatment provided by |
Felipe |
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scientific name |
Osedacoides jurassicus Karl et al., 2012 |
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Osedacoides jurassicus Karl et al., 2012
( Figure 4F View FIGURE 4 )
Material. Several circular borings on four carapace remains (NVP023‒026).
Description. Simple, cylindrical borings, circular to semi-circular in cross-section, with a single entrance perpendicular to slightly inclined to the bone surface, closely spaced, bore diameter ranges between 1–4 mm.
Discussion. Osedacoides are simple, basallybranching borings in bone. They penetrate into bone as a shaft and branch at depth. Osedacoides are exclusively recorded in organic substrates ( Karl, 2016).
Producer. Osteophagous polychaetes ( Karl et al., 2012).
Stratigraphic and geographic distribution. Campanian of the Qarn Ganah, Kharga Oasis (this study). The type ichnospecies has been recorded from the Upper Jurassic (Middle Kimmeridgian) of Germany ( Karl, 2016). This determination may extend the stratigraphic range of the taxon up into the Upper Cretaceous (Campanian) .
Ichnogenus Sulculites Vialov and Nessov, 1974
Type ichnospecies. Sulculites bellus Vialov and Nessov, 1974
Diagnosis. Furrows have a flat bottom and width from 0.18–0.5 mm or a little more, but usually about 0.3‒0.4 mm. They are straight or curved; more often continuous, only rarely intermittent; sometimes single, sometimes forming chains of parallel systems. Groups of parallel furrows can be quite closely spaced to each other, being oriented in different directions. Another common type is curved and often intertwining relatively long furrows. Shorter depressions may be interspersed with them. The ends of the furrows either gradually narrow or abruptly break off ( Vialov and Nessov, 1974).
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