Bothriolepis, Eichwald, 1840
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publication ID |
https://doi.org/ 10.5281/zenodo.4664755 |
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persistent identifier |
https://treatment.plazi.org/id/03CC6624-FFD0-FF9D-FCEB-FE099A35FBEF |
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treatment provided by |
Felipe |
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scientific name |
Bothriolepis |
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Bothriolepis sp. indet. 1
( Figs 77 View FIG ; 78 View FIG )
MATERIAL EXAMINED. — IEC LP 12-6, a Prm; IEC LP 23-45, anterior part of the AVL; LP 32-1, 23-14, 2 Pn and Nu; IEC LP 23-37, prelateral plate; several fragmentary bones of the trunk armour.
LOCALITY AND HORIZON. — Quarry and mines not far from Zarubino village approximately 25 km SE from Lyubitino town, Novgorod region, Russia; upper Famennian.
DESCRIPTION
IEC LP 12-6 is a relatively large Prm with typical reticulate ornamentation ( Fig. 77A, B View FIG ). It is strongly vaulted both in longitudinal and transverse directions. The plate is broader than it is long, maximum breadth (32.4 mm) exceeds the length (30.4 mm). The gently convex rostral margin with weakly defined rostral angle is about 1.4 time longer than the wavy orbital margin, which bears the clearly defined nasal notches. The infraorbital sensory groove (ifc1) crosses the lateral margin about a fourth of plate length from the rostral margin, but then strongly curves posteriorly and meets the supraorbital canal (soc) behind the middle of the plate. The preorbital recess is of trifid type.
The Nu IEC LP 23-14 ( Figs 77C View FIG ; 78A View FIG ) is moderately broad as it is preserved, bears the moderately broad obtected nuchal area and well-defined right lateral margin. The plate is broadest across the lateral corners. The posteri- or margin is almost straight and possess no posterior process. The central sensory line groove is clearly distinct.
The Pn ( Figs 77D View FIG ; 78 View FIG B-D) is of moderate breadth, L/B index 80-96. The lateral division of the Pn is relatively narrow composing 48% of the general breadth of a plate. The posterolateral corner of otico-occipital depression (pr.po) is rounded and extends laterally over the middle of the Pn’s posterior margin.
The AVL IEC LP 23-45 ( Fig. 77E View FIG ) is of moderate breadth as it is preserved. The subcephalic division seems to be relatively short. The anteri- or lateral corner of subcephalic division is situated laterally from the middle between the median and lateral margins; it is developed into a short process. Fragmentary MxL and PVL show a well-developed keel on the dorso-lateral and ventro-lateral ridges.
The ornamentation is reticular, consisting of large pits and quite coarse anastomosing ridges.
REMARKS
All specimens from Zarubino locality, collected by amateur collector, were grouped together because of typical reticular ornamentation with large pits between ridges.
Bothriolepis sp. indet. 1 resembles Bothriolepis ciecere in several features: 1) shape and proportions of the Prm; 2) proportions of the Pn; 3) the position of the postero-lateral corner of otico-occipital depression; 4) similarly strongly defined dorso-lateral and ventro-lateral ridges on the trunk armour; 5) similar ornamentation, but differs in other shape of the Nu and Pn, as well as in more strongly arched Prm.
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.