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III.—On the Cranial Structure of an Early Palæoniscid, Kentuckia, gen. nov.

Published online by Cambridge University Press:  06 July 2012

Dorothy H. Rayner
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Synopsis:

Kentuckia, from the basal Carboniferous, is the earliest bony fish in which neurocranium and dermal skeleton are well known. The dermal bones show that it belongs to the central family Palæoniscidæ of Berg. They have no obvious generalised characters, however, and are chiefly distinguished by a deeply embayed hind margin to the skull roof, no dermohyals and an elongated postorbital bone. These features suggest a greater affinity with the few known Devonian types than with those of the Carboniferous.

The neurocranium has a considerable likeness to Watson's Kansas Palæoniscids A and B, and confirm Watson's view that this is the fundamental type of actinopterygian cranium. Kentuckia is slightly more generalised than the others in having a paired myodome and a less excavated dorsal surface. The notochord in all three has a long anterior extension like that shown in Pteronisculus (Glaucolepis) of the Eo-Trias by Nielsen. This latter fish is similar to the earlier ones if allowance is made for a greater proportion of cartilage. In the discussion reference is also made to the following: the degree of ossification of these fishes, the nature of the cranial fissure and its homologues, the distribution of the third, fourth, fifth and seventh nerves, and the origin of the cranial wall in the orbitotemporal region.

Certain additions are made to Watson's account of Palæoniscids A and B, particularly concerning the interior of the braincase. A new form, C, is also described.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 62 , Issue 1 , 1952 , pp. 53 - 83
Copyright
Copyright © Royal Society of Edinburgh 1952

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References

References to Literature

Aldinger, H., 1937. “Permische Ganoidfische aus Ostgrönland”, Medd. Grønland, en, No. 3, 1–392.Google Scholar
Allis, E. P., 1918. “The myodome and trigemino-facial chamber of fishes and the corresponding cavities of higher vertebrates”, Proc. Nat. Acad. Sci. Washington, iv, No. 8, 241–246.CrossRefGoogle Scholar
Berg, L. S. 1939. “A pineal foramen in Palæoniscidæ”, Compt. Rend. (Doklady) Acad. Sci. U.R.S.S., iv, No. 7, 633–635.Google Scholar
Berg, L. S., 1940. “Classification of fishes, both recent and fossil”, Trav. Inst. Zool. Acad. Sci. U.R.S.S., v, No. 2, 87–517. [Russian, pp. 87–345; English, pp. 346–517.]Google Scholar
Case, E. C., 1937. “The brain and skull of a Palæoniscid fish from the Pennsylvanian of western Missouri”, Proc. Amer. Phil. Soc, LXXVIII, 1–10.Google Scholar
De Beer, G. R., 1937. The Development of the Vertebrate Skull, xxiv + 552 pp., Oxford.Google Scholar
Eastman, C. R., 1908. “Devonian fishes of Iowa”, Ann. Rep. Iowa Geol. Surv. (for 1907), XVIII, 29–386.CrossRefGoogle Scholar
Eaton, T. H., 1939. “A paleoniscid braincase”, Journ. Wash. Acad. Sci., xxix, No. 10, 441–451.Google Scholar
Edinger, T., 1929. Die Fossilen Gehirne, 249 pp., Berlin.Google Scholar
Goodrich, E. S., 1930. Studies on the Structure and Development of Vertebrates, 837 pp., London.CrossRefGoogle Scholar
Gross, W., 1942. “Die Fischfaunen des baltischen Devons und ihre Biostratigraphische Bedeutung”, Korresp. bl. Naturf. Ver. Riga, LXIV, 373–436.Google Scholar
Gross, W., 1950. “Umbenennung von Aldingeria Gross (Palaeoniscidae; Oberdevon) in Moythomasia n. nom.”, Neues Jahrb. Geol. Pal., Heft 5, 145.Google Scholar
Holmgren, N., 1943. “Studies on the Head of Fishes. Part IV”, Act. Zool. Stockh., xxiv, 1–188.Google Scholar
Lehman, J.-P., 1947. “Description de quelques exemplaires de Cheirolepis canadensis (Whiteaves)”, K. svensk. vetensk. Acad. handl. (3), xxiv, No. 4, 1–40.Google Scholar
Moodie, R. L., 1915. “A new fish brain from the Coal Measures of Kansas, with a review of other fossil brains”, Journ. Gomp. Neurol, xxv, No. 2, 135–181.CrossRefGoogle Scholar
Moodie, R. L., 1920. “Microscopic examination of a fossil fish brain,” Journ. Gomp. Neurol., XXXII, 329–333.CrossRefGoogle Scholar
Moodie, R. L., 1931. “On a new specimen of Palæoniscid brain from Iowa”, Ann. Rep. Iowa Geol. Surv. (for 1929), xxxv, 489–498.CrossRefGoogle Scholar
Moore, R. C. et al. , 1944. “Correlation of the Pennsylvanian formations of North America”, Bull. Geol. Soc. Amer., Lv, 657–706.Google Scholar
Moy-Thomas, J. A., 1933. “Notes on the development of the chondrocranium of Polypterus senegalus”, Quart. Journ. Micr. Sci., LXXVI, 209–229.Google Scholar
Moy-Thomas, J. A., and Dyne, M. B., 1938. “The Actinopterygian fishes from the Lower Carboniferous of Glencarthholm, Dumfriesshire”, Trans. Roy. Soc. Edin., LIX, 437–480.CrossRefGoogle Scholar
Nielsen, E., 1936. “Some few preliminary remarks on Triassic fishes from East Greenland”, Medd. Grønland, CXII, No. 3, 1–55.Google Scholar
Nielsen, E., 1942. “Studies on Triassic fishes from East Greenland. I. Glaucolepis and Boreosomus”, Palœozool. Groenland, I, 1–403.Google Scholar
Nielsen, E., 1949. “Studies on Triassic fishes from East Greenland. II. Australosomus and Birgeria”, Palœozool. Groenland, III, 1–309.Google Scholar
Rayner, D. H., 1937. “On Leptolepis bronni Agassiz”, Ann. Mag. Nat. Hist. (10), xix, 46–74.CrossRefGoogle Scholar
Rayner, D. H., 1948. “The structure of certain Jurassic Holostean fishes, with special reference to their neurocrania”, Phil. Trans. Roy. Soc. Lond., Ser. B, CCXXXIII, No. 601, 287–345.Google Scholar
Romer, A. S., 1937. “The braincase of the carboniferous Crossopterygian Megalichthys nitidus”, Bull. Mus. Comp. Zool. Harvard, LXXXII, No. 1, 1–73.Google Scholar
Stensiö, E. A., 1921. Triassic Fishes from Spitzbergen, Part I, XXVIII + 307 pp., Vienna.CrossRefGoogle Scholar
Stensiö, E. A., 1925. “Triassic fishes from Spitzbergen, Part II”, K. svensk. vet. Akad. handl., n, No. 1, 1–261, Stockholm.Google Scholar
Stensiö, E. A., 1932. “Triassic fishes from East Greenland”, Medd. Grønland, LXXXIII, NO. 3, 1–305.Google Scholar
Stensiö, E. A., and Jarvik, E., 1939. Fortschritte der Paläontologie, Bd. 2 (for 1937–38). 2. Agnathi und Pisces, 254–295.Google Scholar
Stockdale, P. B., 1939. “The Lower Mississippian rocks of the East-Central Interior”, Spec. Pap. Amer. Geol. Soc., No. 22, 1–248.Google Scholar
Watson, D. M. S., 1925. “The structure of certain Palæoniscids and the relationships of that group with other bony fish”, Proc. Zool. Soc. Lond., pt. 3, 815–870.CrossRefGoogle Scholar
Watson, D. M. S., 1928. “On some points in the structure of Palæoniscids and allied fish”, Proc. Zool. Soc. Lond., pt. 1, 49–70.CrossRefGoogle Scholar
Weller, J. M. et al. , 1948. “Correlation of the Mississippian formations of North America”, Bull. Geol. Soc. Amer., LIX, 9–196.Google Scholar
Westoll, T. S., 1944. “The Haplolepidæ, a new family of late Carboniferous fishes”, Bull. Amer. Mus. Nat. Hist., LXXXIII, art. 1, 1–121.Google Scholar
Woodward, A. S., and White, E. I., 1926. “The fossil fishes of the Old Red Sandstone of the Shetland Isles”, Trans. Roy. Soc. Edin., LIV, pt. 3, 567–572.Google Scholar