Skryjelites auritus, Valent, Martin, Fatka, Oldřich, Szabad, Michal, Micka, Václav & Marek, Ladislav, 2015
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publication ID |
https://doi.org/ 10.11646/zootaxa.4007.3.8 |
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publication LSID |
lsid:zoobank.org:pub:7BB08011-664C-4437-8A9E-98DB9FD23C32 |
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DOI |
https://doi.org/10.5281/zenodo.5685181 |
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persistent identifier |
https://treatment.plazi.org/id/039E87F8-D47B-B10A-FF4A-3280B1B17DD8 |
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treatment provided by |
Plazi |
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scientific name |
Skryjelites auritus |
| status |
sp. nov. |
Skryjelites auritus sp. nov.
( Figs. 2 View FIGURE 2. A B, C, 3)
1983 Skryjelites auritus sp. nov.; Marek, p. 42–43.
Holotype. NM L40479 ( Figs. 3 View FIGURE 3 C, D); inner surface of operculum.
Paratypes. NM L40721 ( Fig. 3 View FIGURE 3 A); outer surface of operculum. NM L40480 View Materials ( Fig. 3 View FIGURE 3 B, E); outer surface of operculum. NM L40725 ( Fig. 3 View FIGURE 3 F); external mould of venter. NM L40720 ( Fig. 3 View FIGURE 3 G); external mould of venter. NM L40724 ( Fig. 3 View FIGURE 3 H); internal mould of conch. NM L40723 ( Fig. 3 View FIGURE 3 I); external mould of dorsum. NM L40722 ( Fig. 3 View FIGURE 3 J); external mould of dorsum. All specimens come from the Buchava locality.
Type horizon and locality. Middle Cambrian, Buchava Formation, Skryje Member, Paradoxides (Eccaparadoxides) pussilus Biozone; Barrandian area, Skryje–Týřovice Basin, Buchava locality, Czech Republic (N 49°56'33.0", E 13°44'41.8").
Material. In addition to the holotype, other 18 opercula, some of them incomplete and 13 fragmented conchs.
Etymology. From the Latin auritus , long-eared, eared.
Diagnosis. The same as for the genus.
Description. Conch orthocone; ventral side very slightly arched; dorsal side vaulted in regular arch. W/h index = 1.4. Angle of divergence reaching about 16 degrees. Lateral edges sharp, sharply rounded on moulds. Conch with orthogonal aperture; ligula attaining length of about two thirds of apertural width. Drop-like paired dorsal apertural muscle scars laterally elongated. Ventral apertural muscle scar indistinct transversally elongated, being broken in a very obtuse angle in its middle. Presence of apical septa could not be proved. Oblong lines of transversally broken traverse riblets developed on the dorsal side of the conch ( Fig. 3 View FIGURE 3 S). Very fine growth-lines developed on ventral side of conch ( Fig. 3 View FIGURE 3 R).
Monoclaviculate operculum. Narrow clavicles showing asymmetrical T-shaped cross-section. Cardinal processes broadly diverging, with their anterior ends opened; distal ends of cardinal processes cone convoluted and accrued to the surface of cardinal area. Conical shield slightly vaulted; cardinal shield plain. Cardinal area bearing distinct, radially arranged and distally tapered teeth. Surface sculpture consisting of fine growth-lines ( Figs. 2 View FIGURE 2. A B, 3G).
Dimensions. Maximum length of conch attained about 30 mm.
Occurrence. The type species S. auritus sp. nov. is known only from the middle Cambrian of the Skryje–Týřovice Basin at the Buchava, Hradiště, Dlouhá hora and Luh localities ( Figs. 1 View FIGURE 1. A , 2A View FIGURE 2. A ).
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.