Tubes that are similar to the Phanerozoic thecate medusoids are also known from the Ediacaran of Brazil (Corumbella and a possible conulariid), making them a rare instance of a group that is known from both sides of the EdiacaranCambrian boundary (van Iten et al.
Anatomy, pattern of occurrence, and nature of the conulariid schott.
Anatomy and phylogentic significance of the corners and midlines of the conulariid test.
Micro structure and growth of the conulariid test: implications for conulariid affinities.
Well-diversified trilobites, brachiopods, gastropods, echinoderms, phyllocarids, ostracods, bivalves, agnostids, hyoliths, cephalopods and conulariids, associated with graptolites and ichnofossils, have been studied for more than 150 years (see Barrande 1872; Havlicek & Vanek 1966, 1990; Mikulas 1991; Mergl 2002; Chlupac 2003; Kraft & Kraft 2003; Budil et al.
Mergl (2002) proposed that the generally poorly fossiliferous shales with phyllocarids (Caryocaris), graptolites, conulariids, nautiloids and trilobites should be classified as the Rafanoglossa Community within his Paterula Community Group.
Comparatively well diversified trilobites, brachiopods, bivalves, bryozoans, gastropods, ostracods, echinoderms, hyoliths, cephalopods, conulariids, rare agnostids and graptolites, associated with locally abundant ichnofossils from the Bohdalec Formation, have been studied for more than 150 years (see Barrande 1872; Havlicek & Vanek 1966, 1990; Mikulas 1988; Fatka & Mergl 2009).