Cytherellina, Jones and Holl, 1869
|
publication ID |
https://doi.org/ 10.4202/app.2011.0126 |
|
publication LSID |
lsid:zoobank.org:pub:15268E3E-5628-419C-B76F-6710BA70723E |
|
persistent identifier |
https://treatment.plazi.org/id/534987B3-576E-FFA3-FFBE-C7B4FADD6936 |
|
treatment provided by |
Felipe |
|
scientific name |
Cytherellina |
| status |
sp. nov. |
Cytherellina View in CoL ? magyarorszagensis Forel sp. nov.
Figs. 14 View Fig , 15B–J View Fig .
2011 Bythocypris cf Bythocypris sp. B sensu Bolz, 1971; Forel and
Crasquin 2011a: pl. 5: 8, table 1.
Etymology: From Hungarian Magyarország, Hungary.
Type material: Holotype: one complete carapace, Fig. 15B View Fig , UPMC P6M2864 , sample 08BAN63 . Paratype: one complete carapace, Fig. 15C View Fig , UPMC P6M2865 , sample 08BAN61 .
Type locality: Bálvány North section, Bükk Mountains, Hungary .
Type horizon: Level 8, Gerennavár Limestone Formation , Griesbachian, Lower Triassic .
Material.—23 complete carapaces, samples 08BAN61, 62, 63, and 64? (see Fig. 2B), levels 7, 8, Gerennavár Limestone Formation, Bálvány North section, Hungary, Griesbachian, Lower Triassic; Tulong section, Tibet, Anisian, Middle Triassic ( Forel and Crasquin 2011 a; Forel et al. 2011).
Diagnosis.—A species of Cytherellina ? with a high and vertical PB and Hmax located in front of mid−L.
Dimensions.—L 200–550 µm; H 110–320 µm (see Fig. 14 View Fig ). Description.—Carapace short (H/L 0.60); PB almost vertical with angular contact with VB; VB straight to gently concave at both valves; dorsal parts of LV more or less regularly rounded, DB and PDB in continuity, ADB nearly straight; dorsal parts of RV clearly distinct, PDB, DB and ADB long and straight; AB regularly arched with maximum of curvature located at mid−H; at adult specimens AB could be laterally flattened; Hmax located in front of mid−L; LV slightly overlaps RV all around the carapace with maximum at PDB. Internal features unknown.
Discussion.— Cytherellina ? magyarorszagensis sp. nov. is comparable to Pseudobythocypris guiqianensis Yuan, 2009 from the Upper Changhsingian of South China ( Yuan et al. 2007, 2009). The latter species is longer and the maximum of convexity of the AB is located lower. Great confusion exists in the systematics of the smooth shelled bairdiid genera of the Upper Permian–Lower Triassic. A full revision of all these forms is necessary.
Stratigraphic and geographic range.—Tulong section, Tibet, Anisian, Middle Triassic ( Forel and Crasquin 2011 a; Forel et al. 2011); Bálvány North section, levels 7, 8, samples 08BAN61, 62, 63, and 64? (see Fig. 2B), Gerennavár Limestone Formation, Griesbachian, Lower Triassic.
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.