Table 2.

Qualitative characteristics of the five Dinobryon taxa and corresponding stomatocysts analysed in this study.

Vegetative stages		D. cylindricum O.E. Imhof	D. divergens O.E. Imhof	D. pediforme (Lemmermann) Steinecke	D. sertularia Ehrenberg	D. sociale var. americanum (Brunnthaler) H. Bachmann
Colonies	dendroid	no	yes	yes	yes	yes
	scattered	yes	yes	yes	no	no
Lorica body	conical	no	no	no	yes	yes
	*cylindrical	yes	yes	yes	no	no
	middle part distended	yes	no	no	no	no
	middle part wavy	no	yes	no	no	no
Lorica surface	*smooth	yes	yes	yes	yes	yes
	striated	no	no	yes	no	no
Lorica posterior part	short	yes	yes	yes	yes	no
	sharpened	no	yes	yes	no	yes
	oblique	yes	yes	yes	no	no
	1-2 lateral appendages	no	no	yes	no	no
Source		36	36	this study	21	19
Resting stages		stomatocyst 41, Duff & Smol 1989	stomatocyst 161, Zeeb & Smol 1993	stomatocyst #61, Piątek J., this paper	stomatocyst 48, Piątek J. 2012	stomatocyst 79, Duff & Smol 1991
Cyst shape	obovate	yes	no	no	no	no
	slightly oval	no	yes	no	no	no
	*spherical	yes	yes	yes	yes	yes
Collar shape	conical	yes	no	yes	no	no
	cylindrical	no	yes	no	yes	no
	*obconical	no	no	no	no	yes
	hooked apex	yes	no	no	no	no
Ornamentation	smooth	yes	yes	yes	yes	no
	scabrae	no	no	no	no	yes
	verrucae	no	no	no	no	yes
Source		7	7	this study	21	19

Occurrence of the characteristics was marked as “yes”, their absence as “no”. Characteristics marked with an asterisk (*) were excluded from the cluster analysis to avoid occurrence common for all five taxa and duplicate values.