Dasyalosia Muir−Wood and Cooper, 1960
|
publication ID |
https://doi.org/ 10.4202/app.2008.0309 |
|
persistent identifier |
https://treatment.plazi.org/id/1B17B006-D46B-9722-2EC8-010041E8F8EE |
|
treatment provided by |
Felipe |
|
scientific name |
Dasyalosia Muir−Wood and Cooper, 1960 |
| status |
|
Genus Dasyalosia Muir−Wood and Cooper, 1960 orly not reaching the base of cardinal process; adductor scars
Type species: Spondylus goldfussi von Münster, 1839 ; Upper Permian ; slightly elevated, elongate and suboval .
Gera, Germany. Both valves sublamellose, densely covered with recum−
Dasyalosia
cf. panicula Brunton, 1966 bent and erect spines.
Fig. 17 View Fig . Remarks.—Genus Dasyalosia was established by Muir−Wood and Copper (1960) with D. goldfussi (Münster, 1839) from
cf. 1966 Dasyalosia panicula sp. n.; Brunton 1966: 193–194; pl. 2:1–17;
pl. 3: 1–5. Permian of Germany as a type species. Brunton (1966) described two other species of the genus, namely D. panicula
Material.—One complete shell, one fragmentary ventral and and D. lamnula , both from Viséan of County Fermanagh,
one dorsal valve. Northern Ireland. Thus, these two species expanded markedly
Description.—A single articulated shell is 3.3 mm in length the stratigraphic range of Dasyalosia . The lower stratigraphic and 4.0 mm in width, is subcircular in outline, nearly plano− to range of the genus is extended further to the middle Tour−
weakly concavoconvex in profile, with a cicatrix on the ven− naisian thanks to the material here described. Waterhouse tral valve measuring about 1.2 mm in diameter; a straight (2001) recently regarded both Viséan species of Dasyalosia hinge line, one−half of the maximum width. Ventral valve with mentioned above as representing his new genus Bruntonaria
Waterhouse, 2001 with D. panicula as a type species. However, Brunton (2007) regarded Bruntonaria as congeneric with Dasyalosia .
Dasyalosia cf. panicula from Muhua differs evidently from D. lamnula in having much wider ventral interarea and less lamellose ventral valve. From D. panicula the Chinese form differs in having slightly wider shell and less abundant spine cover of both valves. Besides these differences both forms seem to be quite closely related. It is highly possible that the studied form represents a new species, but scarcity of material does not allow for a satisfactory specific diagnosis.
Stratigraphic and geographic range.—The species is known from the Viséan of County Fermanagh, Northern Ireland. In Muhua it is very rare occurring in sample GB only.
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.