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Fig. 5 | BMC Biology

Fig. 5

From: Cambrian suspension-feeding tubicolous hemichordates

Fig. 5

a Life reconstruction with hypothetical closed terminal ends of the tubes — part of one tube partially removed to show a worm (drawing by Marianne Collins). b Phylogenetic relationship of Deuterostomia derived from [2]. Mapping of characters based on [1, 2] with our proposed hypothetical position for Oesia disjuncta as a basal hemichordate (dashed line with question mark). The position of Spartobranchus tenuis is based on a taphonomic study of extant and fossil enteropneusts [11]. Character states: 1) pharyngeal gill bars, suspension feeding; 2) notochord; 3) tubicolous; 4) miniaturization, coloniality; 5) fuselli; 6) loss of tubicolous lifestyle, deposit feeding; 7) indirect development via tornaria larva; 8) stereom, water vascular system

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