Middle and Upper Cambrian Protoconodonts and Paraconodonts from Hunan, South China
نویسندگان
چکیده
منابع مشابه
The first tunicate from the Early Cambrian of South China.
Here we report the discovery of eight specimens of an Early Cambrian fossil tunicate Shankouclava near Kunming (South China). The tunicate identity of this organism is supported by the presence of a large and perforated branchial basket, a sac-like peri-pharyngeal atrium, an oral siphon with apparent oral tentacles at the basal end of the siphonal chamber, perhaps a dorsal atrial pore, and an e...
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ECOS III The slender, spine-shaped, apatitic protoconodonts appear in the fossil record near the Precambrian-Cambrian boundary and persist through the Cambrian . Recent work (Szaniawski 1 982, J. Paleont. 56) suggests that protoconodont elements were homologous to the grasping spines of modern chaetognaths . Paraconodonts are similar to protoconodonts in their mode of growth by basal accretion ...
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ژورنال
عنوان ژورنال: Palaeontology
سال: 2001
ISSN: 0031-0239,1475-4983
DOI: 10.1111/1475-4983.00210