RadWorld

Dictyomitra multicostata Zittel, O'Dogherty, 1994, p. 82
(Pl. 4, figs. 17-19)

-Dictyomitra multicostata Zittel, 1876, p. 81, pl. 2, figs. 2-4 (selected herein as lectotype), 4 (not fig. 3); Rüst, 1892a, p. 109, pl. 16, fig, 3; Holmes, 1900a, p. 701, pl. 38; fig. 3. Nauss, 1947, p. 341, pl. 48, figs. 3, 8; Pessagno, 1976, p. 52, pl. 14, figs. 4-9; Nakaseko and Nishimura, 1981, p.151, p1. 8, fig. 1; p1. 16, fig. 1; Okamura et al., 1982, pl. 17, fig. 3; Kuhnt et al., 1986, pl. 7, fig. v; Suyari, 1986a, pl. 8, figs. 7?, 8; pl. 10, fig. 13; pl. 12, fig. 9; pl. 14, fig. 12; pl. 16, fig. 4; pl. 18, figs. 10-11?; pl. 21, fig. 4; Iwata and Tajika, 1989, pl. 2, fig. 5; Ling, 1991b, p. 320, pl. 2, figs. 4-5; p1. 3, fig. 5 ?; Wakita et al., 1994, figs. 7.3-5; non Bak, 1993b, p. 188, pl. 2, fig. 14 (= D. montisserei)
-Dictyomitra (Dictyomitroma) multicostata Zittel, Campbell and Clark, 1944b, p. 39, pl. 8, figs. 22-24?, 29 ?, 35 ?, 42
-Dictyomitra (D.) cf. D. (D.) multicostataZittel, Bolin, 1956, p. 295, pl. 39, fig. 19
-Not Dictyomitra (Dictyomitra) multicostata Zittel, in Pessagno, 1963, pp. 206-208, pl. 1. figs. 9 (= D. densicostata Pessagno, n. sp.), 10 (= D. formosa Squinabol), pl. 4. figs. 1, 3 (= D. formosa Squinabol), pl. 5. figs. 3 (= D. densicostata Pessagno, n. sp.), fig. 7 (= D. formosa Squinabol)
-Dictyomitra lamellicostata Zittel, Foreman, 1968, p. 65, pl. 7, figs. 8a-b
-Dictyomitra cf. multicostata Zittel, Foreman, 1968, p. 63, pl. 7, figs. 9a-b; Thurow and Kuhnt, 1986, text-fig. 9.10
- Not Dictyomitra aff. multicostata Zittel, Zhamoida et al., 1968, pl. 3, fig. 3
- Not Dictyomitra sp. cf. D. multicostata Zittel, Foreman, 1971, pl. 5, fig. 16
-Dictyomitra sp. Foreman, 1971, p. 1677, pl. 3, fig. 6
- Not Dictyomitra multicostata Zittel, Petrushevskaya and Kozlova, 1972, p. 550, pl. 8, figs. 9, 10
- Pars? Dictyomitra striata Lipman, Petrushevskaya and Kozlova, 1972, p. 550, pl. 8, figs. 13, non fig. 12
- Not Dictyomitra ex. gr. multicostata Zittel, Zhamoida, 1972, p. 118, pl. 16, fig. 6; p1. 18, figs. 6, 7; ? Gorka, 1989, p.342, p1. 13, figs. 9, 13; non Gorka, 1991, p. 44, pl. 2, fig. 5 (= P. lodogaensis)
? Dictyomitra cf. pseudoscalarisTan Sin Hok, Dumitrica, 1975, text-fig. 2.15
-Archaeodictyomitra squinaboli Pessagno, Okamura et al., 1982, pl. 17, figs. 1, 8
-Archaeodictyomitra cf. pseudoscalaris (Tan Sin Hok) Suyari, 1986a, pl. 9, figs. 10, 11
- Pars Archaeodictyomitra vulgarisPessagno, Suyari, 1986a, pl. 4, fig. 14; pl. 11, fig. 5 ?; non pl. 2, fig. 5 and pl. 19, fig. 10 ? (= D. montisserei)
-Dictyomitra napaensis Pessagno, Suyari, 1986a, pl. 5, fig. 4
- ?Dictyomitra gr. duodecimcostata (Squinabol) Gorka, 1989, p. 342, p1. 13, figs. 10-12
- Pars Archaeodictyomitra vulgaris Pessagno, Tumanda, 1989, p. 36, pl. 7, fig. 4; non fig. I (= D. montisserei ?)

Revised description and dimensions:Test slender spindle shaped, conical proximally; more or less lobulate in outline. Cephalis sharply pointed apically. Test costate throughout, with slight constrictions. Six to eight post-abdominal chambers rapidly increasing in length distally. Costae converging apically, wedging out near junctions of the thorax and the first post-abdominal chambers, where constrictions are absent. Nine to ten sharp widely spaced costae in lateral view. Costal projections developed on distalmost chamber.
      Length of test 267-287µm, maximum width of test 117-120µm.
Remarks:In order to stabilise the chaotic taxonomic status of this nominal species a lectotype was designated by Pessagno (1976). It is the specimen shown on pl. 2, fig. 2, among the Zittel's original illustrations. This lectotype was reported from Upper Cretaceous (Maastrichtian ?) of Vordorf (Germany). Only a minor revision was made by Foreman (1968) on material from Oberg bei Peine (one sample from the Campanian strata), near Zittel's type locality. The specimen figured by Foreman in pl. 7, figs. 4a-b corresponds very well with Zittel's original description.
D. multicostata seems to have evolved directly from D. formosa in early Turonian time by acquiring a more spindle-shaped test accompanied by a decrease on the degree of the development of strictures.
Locality:Monte Casalini section, about 15 km south of Assisi on a regional road from Foligno to Sasso Vibo Abbey, close to the abbey, top of the Scaglia Bianca Formation, white-beige limestones with grey-black cherts, Umbria-Marche, Central Italy.
Stratigraphic range:Late Turonian. Cretaceous. Mesozoic.
Subsequent descriptions:?

Literature cited:- Bak, M. (1993b). Late Albian-early Cenomanian Radiolaria from the Czorsztyn succession Pieniny Klippen Belt, Carpathians. K. Birkenmajer. Crakow, Poland. 102: 177-207.
- Bolin, E. J. (1956). Upper Cretaceous Foraminifera, Ostracoda and Radiolaria from Minnesota. Journal of Paleontology 30(2): 278-298. - Campbell, A. S. and B. L. Clark (1944b). Radiolaria from Upper Cretaceous of Middle California. Geological Society of America Special Paper 57: 1-61.
- Dumitrica, P. (1975). Cenomanian Radiolaria at Podul Dimbovitei. Micropaleontological guide to the Mesozoic and Tertiary of the Romanian Carpathians. 14th European Micropaleontological Colloquium, Romania. Bucharest, Romania, Institute of Geology and Geophysics: 87-89.
- Foreman, H. P. (1968). Upper Maestrichtian Radiolaria of California. The Palaeontological Association, Special Papers in Palaeontology 3: 1-82.
- Foreman, H. P. (1971). Cretaceous Radiolaria, Leg 7, DSDP. Initial Reports of the Deep Sea Drilling Project. E. L. Winterer, W. R. Riedel and et. Washington, D.C., U. S. Government Printing Office. 7: 1673-1693.
- Gorka, H. (1989). Les Radiolaires du Campanien inférieur de Cracovie (Pologne) (Lower Campanian Radiolaria from Cracow, Poland). Acta Paleontologica Polonica 34(4): 327-354.
- Gorka, H. (1991). Les radiolaires du Turonien inférieur du sondage de Leba IG 1 (Pologne)(Lower Turonian radiolarians from the well Leba IG 1, Poland). Cahiers de Micropalˇontologie 6(1): 39-45.
- Holmes, W. M. (1900a). On Radiolaria from the Upper Chalk at Coulsdon (Surrey). Quarterly Journal of the Geological Society of London 56: 694-704.
- Iwata, K. and J. Tajika (1989). Jurassic and Cretaceous radiolarians from the pre-Tertiary system in the Hidaka Belt, Maruseppu region, Northeast Hokkaido. Journal of the Faculty of Science, Hokkaido University 22(3): 453-466.
- Kuhnt, W., J. Thürow, et al. (1986). Oceanic anoxic conditions around the Cenomanian/Turonian boundary and the response of the biota. Mitteilungen Geologisch - Paläontlogische. Institut. Universitet. Hamburg. 60: 205-246.
- Ling, H.-Y. (1991b). Cretaceous (Maestrichtian) radiolarians: Leg 114. Proceedings of the Ocean Drilling Program, Scientific Results. P. F. Ciesielski, Y. Kristoffersen and e. al., College Station, TX (Ocean Drilling Program). 114: 317-324.
- Nakaseko, K. and A. Nishimura (1981). Upper Jurassic and Cretaceous Radiolaria from the Shimanto Group in Southwest Japan. Science Reports, College of General Education Osaka University 30(2): 133-203.
- Nauss, W.W. (1947). Cretaceous microfossils in the Vermilion area, Alberta. Journal of Paleontology 21:329-343.
- O'Dogherty, L. (1994). Biochronology and paleontology of Mid-Cretaceous radiolarian from Northern Apennines (Italy) and Betic Cordillera (Spain). Mémoires de Géologie (Lausanne) 21: 1-415.
- Okamura, M., K. Nakaseko, and Nakano, K., (1982). Radiolarians from the Kajisako Formation, Monobe area, Shikoku. Multidisciplinary Research of the Upper Cretaceous Monobe Area, Paleontological Society of Japan, Special Paper 25: 93-102.
- Pessagno, E. A. (1963). Upper Cretaceous Radiolaria from Puerto Rico. Micropaleontology 9(2): 197-214.
- Pessagno, E. A. (1976). Radiolarian zonation and stratigraphy of the Upper Cretaceous portion of the Great Valley Sequence, California Coast Ranges. Micropaleontology, Special Publication 2: 1-95.
- Petrushevskaya, M. G. and G. E. Kozlova (1972). Radiolaria: Leg 14, Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. D. E. Hayes, A. C. Pimm et al. Washington, D.C., U. S. Government Printing Office 14: 495-648.
- Rüst, D. (1892a). Radiolaria from the Pierre Formation of North-Western Manitoba. Geological and Natural History Survey of Canada, Contributions to Canadian Micropalaeontology 4: 101-110.
- Suyari, K. (1986a). Restudy of the Northern Shimanto Subbelt in eastern Shikoku. Journal of Science, University of Tokushima 19: 45-54.
- Tumanda, F. (1989). Cretaceous radiolarian biostratigraphy in the Eashi Mountain area, Northern Hokkaido, Japan. Science Reports of the Institute of Geoscience, University of Tsukuba, Section B: Geological Sciences 10: 1-44.
- Thürow, J. and W. Kuhnt (1986). Mid-Cretaceous of the Gibraltar Arch Area. North Atlantic Palaeoceanography. C. P. Summerhayes and N. J. Shackleton, Special Publications of the Geological Society of London. 22: 423-445.
- Wakita, K., M. J. Sopaheluwakan, et al. (1994). Cretaceous radiolarians from the Luk-Ulo Melange complex in the Karangsambung area, central Java, Indonesia. Journal of Southeast Asian Earth Sciences 9(1-2): 29-43.
- Zhamoida, A. I. (1972). Biostratigrafiya mezozoiskikh kremnistykh tolshch Vostoka SSSR (na osnove izucheniya radiolyarii) (Biostratigraphy of the Mesozoic siliceous strata of the east of the USSR (as based on the study of Radiolaria)). Trudy Vsesoyuznogo Ordena Lenina Nauchno-Issled ovatelskogo Geologicheskogo Instituta (VSEGEI), n. Ser. 183: 1-199.
- Zhamoida, A. I., Y. M. Kovtunovich, and Savitskii, V.O., (1968). Kompleksy mezozoiskikh radiolyarii Vsstochno-Sakhalinskikh gor (Complexes of Mesozoic radiolarians of the East Sakhalin Mountain Range). Ezegodnik Vsesoyuznogo paleontologicheskogo Obshchestva 18: 24-40.
- Zittel, K. A. (1876). Über einige fossile Radiolarien aus der norddeutschen Kreiden. Zeitschrift der deutschen geologischen Gesellschaft 28: 75-87.

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