Uskatia conferta

Uskatia conferta Neub., Upper Permian, Kuznetsk Coal Basin (IFinskoe and Erunakovo Groups), South Siberia (Neuburg, 1960). This species is found as numerous foliated and branching shoots. Cell structure is well represented in different leaf parts, with less clear structure of the leaf base. 

Palaeodichelyma differs from Jurassic Muscites fontinaloides and Bryokhutuliinia jurassica by the presence of costa, and from Tricostium by the elongate laminal cells and single costa (in fact, differences are very numerous, but there is no reason to list them for such different plants). The Palaeozoic Bajdaievia is similar to Palaeodichelyma in many details (leaf size and shape, pattern of foliage), but lacks the loose areolation in the basal part of the leaf, where net venation (briefly explained in Section 16.2.2 Polyssaievia and Bajdaievia) is developed. Uskatia conferta is similar to Palaeodichelyma in general appearance and leaf dimensions, but differs in the presence of a distinct leaf border and at places the apparent oblique rows of laminal cells. We consider them also to be fundamentally different in their patterns of leaf attachments, although this character is not always observed in both species. 

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