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Orthacanthus is an extinct genus of fresh-water xenacanthiform cartilaginous fish, named by Louis Agassiz in 1843, [3] [4] ranging from the Upper Carboniferous [3] into the Lower Permian. [1]
Doliolidae is a family of tunicates in the order Doliolida.Members of the family are pelagic and often found far away from coastlines. [1]Members of the family are transparent, gelatinous, barrel-shaped or cylindrical marine organisms.
The School and university projects page collects information about Wikipedia projects for school and university classes, including an archive of many past class projects. Lists of current classes (and other programs) using Wikipedia can be found at dashboard.wikiedu.org and outreachdashboard.wmflabs.org , as well as below at current projects .
Burrow et al. 2016 provides vindication by finding chondrichthyans to be nested among Acanthodii, most closely related to Doliodus and Tamiobatis. [2] A 2017 study of Doliodus morphology points out that it appears to display a mosaic of shark and acanthodian features, making it a transitional fossil and further reinforcing this idea. [5]
Lasanius is a genus of basal jawless fish from the Early Silurian, around 443.8 million years ago, known from fossils found near Lesmahagow, Scotland.Specimens range from 13.3 to 74.5 mm in length.
Download QR code; Print/export Download as PDF; Printable version; In other projects ... Diaphus problematicus, the problematic lanternfish, ...
Tarrasius problematicus (of Mississippian origin, ~ 350 Ma) featured a fully regionalized tetrapod-like spine divided into 5 distinct segments. [ 5 ] [ 6 ] It is not considered a transitional fossil though, but an extreme example of convergent evolution .
The China–Cornell–Oxford Project, short for the "China-Oxford-Cornell Study on Dietary, Lifestyle and Disease Mortality Characteristics in 65 Rural Chinese Counties," was a large observational study conducted throughout the 1980s in rural China, a partnership between Cornell University, the University of Oxford, and the government of China. [1]