Baeopleuroceras [SEP] parent taxon
Baeopleuroceras
Baeopleuroceras is a genus included in the Barrandeoceroid family Nephriticeratidae, found in Middle Devonian sediments in eastern North America (NY, Penn, Ont.)
The shell of "Baeopleuroceras" is a short, rapidly expanding cyrtocone, curved through at least 90 degrees. The body chamber is one half the overall shell length. The siphuncle is subcentral with segments slightly expanded into the chambers.
"Rhadinoceras" and "Nephriticeras" are somewhat similar genera from within the Nephriticeratidae, except that in both the siphuncle is displaced
Taxon in disguise
In bacteriology, a taxon in disguise is a species, genus or higher unit of biological classification whose evolutionary history reveals has evolved from another unit of similar or lower rank, making the parent unit paraphyletic. This happens when rapid evolution makes a new species appear radically different from the ancestral group, so that it is not (initially) recognised as belonging to the parent phylogenetic group, leaving the latter an evolutionary grade.
While the term is from bacteriology, parallel examples are found throughout the tree of