Phylogeny of Fusus And Its Allies, By Amadeus W. Grabau
Phylogeny of Fusus And Its Allies, By Amadeus W. Grabau
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In the Eocene of the Gulf States of North America occur several species of Fusoid shells which have all the aspect of a true Fusus, but diflfer from that genus in the strikingly distinct protoconch. This is closely similar to that of many species generally referred to Pleurotoma, These shells are genetically related to Leviftisus, and species like ^'Fusus" bellns of the same geological horizon which have similar protoconchs. Of these groups they represent the elongated types.
Their genetic rela...tion to certain species of the heterogeneous group Pleurotoma is suggested by the close similarity of protoconch and early whorls. For such shells with Fusus form and Pleurotoma protoconch the name Falsifusus is proposed.
FALSIFUSUS gen. nov.
Shells fusiform, with a long and slender spire, and a canal of about the same length. Protoconch merging into the whorls of the conch, no sharp line of demarkation being apparent. The first two whorls PHYLOGENY OF FUSUS AND ITS ALLIES.
8l of the protoconch are generally smooth, the apical one minute, gradually increasing in size.
What to read after Phylogeny of Fusus And Its Allies, By Amadeus W. Grabau?
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To quickly assess the difficulty of the text, read a short excerpt:
In the Eocene of the Gulf States of North America occur several species of Fusoid shells which have all the aspect of a true Fusus, but diflfer from that genus in the strikingly distinct protoconch. This is closely similar to that of many species generally referred to Pleurotoma, These shells are genetically related to Leviftisus, and species like ^'Fusus" bellns of the same geological horizon which have similar protoconchs. Of these groups they represent the elongated types.
Their genetic rela...tion to certain species of the heterogeneous group Pleurotoma is suggested by the close similarity of protoconch and early whorls. For such shells with Fusus form and Pleurotoma protoconch the name Falsifusus is proposed.
FALSIFUSUS gen. nov.
Shells fusiform, with a long and slender spire, and a canal of about the same length. Protoconch merging into the whorls of the conch, no sharp line of demarkation being apparent. The first two whorls PHYLOGENY OF FUSUS AND ITS ALLIES.
8l of the protoconch are generally smooth, the apical one minute, gradually increasing in size.
What to read after Phylogeny of Fusus And Its Allies, By Amadeus W. Grabau?
You can find similar books in the "Read Also" column, or choose other free books by Grabau, Amadeus W. (Amadeus William), 1870-1946 to read onlineMoreLess
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