| المصدر: |
Late Silurian to earliest Devonian vertebrate biostratigraphy of the Birch Creek II section, Roberts Mountains, Nevada, U. S. A., pp. 1-32 in PaleoBios, 40(4), 19, (2023-06-06) |
| الوصف: |
LOPHOSTEUS SP. CF. L. SUPERBUS (FIG. 6E–G; TABLE 1; SUPPL. 1, FIGS. 1, 10, 12) Referred specimens —Scales assigned to this species occur at levels 318’ (96.9 m), 457’ (139.3 m), 468’ (142.6 m), and possibly 527.25’ (160.7 m): Roberts Mountains Formation. Description —The rare remains comprise scale and dermal bone fragments (Fig. 6 E-G), the former ornamented with inclined, elongate ridged tubercles (Fig. 6E) with the best example being a broken scale from level 318’ having parallel elongate tubercles extending the length of the rhombic scale. The dermal bone fragments mostly have more stellate tubercles (Fig. 6F). Comparison — The best-preserved scale fragment compares closely with scales of the type species L. superbus from the upper Přidolí Ohesaare Beds, Saaremaa Island, Estonia rather than with scales of other species. (See Schultze and Märss 2004, for examples of Lophosteus spp. From the Baltic, Canada, and Russia). ; Published as part of Burrow, Carole Jan, Murphy, Michael & Turner, Susan, 2023, Late Silurian to earliest Devonian vertebrate biostratigraphy of the Birch Creek II section, Roberts Mountains, Nevada, U. S. A., pp. 1-32 in PaleoBios 40 (4) on page 19, DOI:10.5070/P940454153, http://zenodo.org/record/10913559 |