Aipocerataceae
Encyclopedia
The Aipocerataceae is a superfamily within the Order Nautilida
characterized by rapidly expanding, smooth to ribbed, cyrtoconic to coiled shells with rounded or sometimes dorsally flattened or impressed whorls, nearly straight sutures, and a ventral and marginal siphuncle. Septal necks are orthochoantic ventrally and orthochoantic or cyrtochoanitic dorsally. (Kummel 1964, p. K440)
The Aipocerataceae is the Solenochilida Flower in Flower and Kummel 1950 and is the Solenocheilaceae which Shimansky included in his Rutoceratina minus the Litogyroceratidae which the Treatise
(Kummel 1964, p. K418 ) includes in the Rutoceratidae
(Tainocerataceae
)
The Aipocerataceae includes three families and at least 9 genera. The families are the AipoceratidaeHyatt 1883, Solenochilidae Hyatt 1893, and Scyphoceratidae Ruzhentsev & Shimansky 1954 (Kummel 1964 pp K440 -K442)
The Aipoceratidae are represented by the loosely coiled, compressed and gyroconic Aipoceras from the Lower Carboniferous (Miss) of Europe and North America; the Solenochilidae by the tightly coiled comopolitan Solenochilis from the Upper Carboniferous (Penn)- Lower Permian, with spines projecting straight out laterally from the umbilical region; Scyphoceratidae by Scyphoceras from the Lower Permian of the Urals which has a ribbed shell and a relatively small and sharply curved phragmocone.
The derivation of the Aipocerataceae is somewhat tenuous. Kummel (1964, K385 fig. 280) shows a tentative connection to the Rutoceratidae in the Devonian. Flower in Flower and Kummel 1950 also shows a tentative connection but from the equivalent Solenochilida to the Barrndeocerida. Shimansky on the other hand (fig 281, K287, Kummel 1964) shows a direct connection from the Solenocheilaceae to the Rutoceratidae.
Nautilida
The Nautilida constitute a large and diverse order of generally coiled nautiloid cephalopods that began in the mid Paleozoic and continues to the present with a single family, the Nautilidae which includes two genera, Nautilus and Allonautilus, with six species...
characterized by rapidly expanding, smooth to ribbed, cyrtoconic to coiled shells with rounded or sometimes dorsally flattened or impressed whorls, nearly straight sutures, and a ventral and marginal siphuncle. Septal necks are orthochoantic ventrally and orthochoantic or cyrtochoanitic dorsally. (Kummel 1964, p. K440)
The Aipocerataceae is the Solenochilida Flower in Flower and Kummel 1950 and is the Solenocheilaceae which Shimansky included in his Rutoceratina minus the Litogyroceratidae which the Treatise
Treatise on Invertebrate Paleontology
The Treatise on Invertebrate Paleontology published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and covering every phylum, class, order, family, and genus of fossil and...
(Kummel 1964, p. K418 ) includes in the Rutoceratidae
Rutoceratidae
The Rutoceratidae are the prototypical nautilids, derived probably from either the Brevicoceratidae or Acleistoceratidae of the Oncocerida early in the Devonian...
(Tainocerataceae
Tainocerataceae
The Tainocerataceae is a superfamily in the cephalopod order Nautilida characterized by straight to loosely coiled shells, generally with a degressed, such that the width is greater than the height, to quadrate whorl section. Many bore spines, ribs, frills, wings, or nodes...
)
The Aipocerataceae includes three families and at least 9 genera. The families are the AipoceratidaeHyatt 1883, Solenochilidae Hyatt 1893, and Scyphoceratidae Ruzhentsev & Shimansky 1954 (Kummel 1964 pp K440 -K442)
The Aipoceratidae are represented by the loosely coiled, compressed and gyroconic Aipoceras from the Lower Carboniferous (Miss) of Europe and North America; the Solenochilidae by the tightly coiled comopolitan Solenochilis from the Upper Carboniferous (Penn)- Lower Permian, with spines projecting straight out laterally from the umbilical region; Scyphoceratidae by Scyphoceras from the Lower Permian of the Urals which has a ribbed shell and a relatively small and sharply curved phragmocone.
The derivation of the Aipocerataceae is somewhat tenuous. Kummel (1964, K385 fig. 280) shows a tentative connection to the Rutoceratidae in the Devonian. Flower in Flower and Kummel 1950 also shows a tentative connection but from the equivalent Solenochilida to the Barrndeocerida. Shimansky on the other hand (fig 281, K287, Kummel 1964) shows a direct connection from the Solenocheilaceae to the Rutoceratidae.
References
- Flower & Kummel 1950. A Classificiation of the Nautiloidea; Journal of Paleontology, V.24, n.5, pp604–616,Sept 1950.
- Kummel, B. 1964. Nautiloidea - Natilida; Treatise on Inertebrate Paleontology part K; Geological Society of America and University of Kansas Press.
- see also Paleobiology Database