60


Journal of Paleontology 91(1):25–72


Occurrence.—Upper Bajocian to upper Campanian. Remarks.—Includes generic concepts of Antexitus Yeh, 2009.


Xitus skenderbegi (Chiari, Marcucci, and Prela, 2002) Figure 7.1−7.3


1993 Xitus? sp. A Cortese, p. 181, pl. 7, figs. 6−7. 1997 Xitus sp. Matsuoka and Baumgartner, pl. 3, fig. 16. 1999 Xitus sp. A Halamić et al., pl. 3, figs. 1−4.


2002 Neorelumbra skenderbegi Chiari, Marcucci, and Prela, p. 68, pl. 1, figs. 14−21.


2003 Neorelumbra skenderbegi; Suzuki and Gawlick, p. 190, fig. 6.32.


2004 Neorelumbra skenderbegi; Chiari et al., pl. 2, fig. 2.


2005 Xitus skenderbegi; Šmuc and Goričan, p. 62, pl. 4, figs. 15−16.


2008 Xitus skenderbegi; Auer et al., fig. 9.42 2009 Xitus skenderbegi; Suzuki and Gawlick, fig. 5.11.


Xitus sp. A Figure 7.12−7.13


Remarks.—This species differs from X. skenderbegi by having a more slender shape; it differs from X. magnus Baumgartner in Baumgartner et al., 1995 in being smaller and having fewer segments.


Family Xitomitridae new family Type genus.—Xitomitra new genus.


Included genera.—Campanomitra new genus; Parvimitrella new genus; Pseudodictyomitrella Grill and Kozur, 1986; Xitomitra new genus.


Diagnosis.—Multicyrtid nassellarians with small poreless cephalis and all other segments covered by a latticed meshwork of uniform size polygonal pore frames. Shell largely open distally and lacking any kind of distal projections or appendages. The genera are distinguished on the basis of presence or absence of apical horn and presence or absence of stricture at intersegmental constrictions. Only one genus, Xitomitra n. gen., may develop a secondary layer of very faint nodes on distal segments.


Occurrence.—Aalenian to Maastrichtian.


Remarks.—The Xitomitridae n. fam. is related to the Canopti- dae, Parvicingulidae, and Xitidae. It differs from the Canoptidae by having a latticed shell with larger pores. It differs from Par- vicingulidae by lacking the typical arrangement of horizontal rows of pores per segment. Xitomitridae n. fam. is also dis- tinguished from Xitidae by lacking the typical double layer latticed meshwork bearing large tubercles on the entire surface.


Genus Campanomitra new genus Type species.—Stichocapsa praepulchella Hori, 1999.


Other species.—Amphipyndax awaensis Nakaseko and Nishimura in Nakaseko et al., 1979; Amphipyndax conicus Nakaseko and Nishimura, 1981; Amphipyndax ellipticus Nakaseko and Nishimura, 1981; Archicorys pulchella Rüst, 1885; Parvicingula cappa Cortese, 1993; ?Pseudoeucyrtis buekkensis Grill and Kozur, 1986, Quarticella hunzikeri O’Dogherty, Goričan, and Dumitrica in O’Dogherty et al., 2006; ?Stichocapsa labyrinthica Dumitrica in Dumitrica et al., 1997; Stichocapsa tuscanica Chiari, Cortese, and Marcucci in Chiari et al., 1997; Stichocapsa ulivii Chiari, Cortese, and Marcucci in Chiari et al., 1997; Stichocapsa devorata arctica Vishnevskaya and Murchey, 2002; forms included as Stichocapsa spp. by Matsuoka (1998, figs. 35, 37−40).


Diagnosis.—Campanulate shell composed of four to ten seg- ments. Largely open distally. Small, poreless cephalis without apical horn. Other segments covered by a latticed meshwork consisting of relatively large polygonal pore frames. The stric- tures between junctions of the segments are never present.


Etymology.—Genus name derived from campano (bell) and mitra (ecclesiastical headgear: miter). Feminine gender.


Occurrence.—Bajocian to Cenomanian.


Remarks.—Campanomitra n. gen. differs from Pseudodictyo- mitrella by lacking an apical horn. It differs from Parvimitrella and Xitomitra in having larger pores and no intersegmental constrictions. Campanomitra n. gen. differs from Takemuraella by lacking the arrangement of three rows of pores per segment and having no circumferential ridges. A common character of the genus in Cretaceous species is


the presence of a large sutural pore on the surface of the shell. Stichocapsa labyrinthica Dumitrica in Dumitrica et al., 1997 is tentatively assigned in this genus because it lacks the distinctive sutural pore present in all other Cretaceous representatives of the genus.


Campanomitra sp. aff. C. buekkensis (Grill and Kozur, 1986) Figure 6.44


1986 Pseudoeucyrtis buekkensis Grill and Kozur, p. 251, pl. 6, fig. 4.


Remarks.—This specimen is characterized by an irregular arrangement of circular pores throughout the entire shell. It differs from typical C. buekkensis in which the pores are arranged in horizontal rows distally.


Campanomitra tuscanica (Chiari, Cortese, and Marcucci in Chiari et al., 1997) Figure 6.65−6.69


1986 1997


Pseudodictyomitrella hexagonata; Grill and Kozur, pl. 4, fig. 2.


Stichocapsa tuscanica Chiari, Cortese, and Marcucci in Chiari et al., p. 70, pl. 4, figs. 8−9.


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96  |  Page 97  |  Page 98  |  Page 99  |  Page 100  |  Page 101  |  Page 102  |  Page 103  |  Page 104  |  Page 105  |  Page 106  |  Page 107  |  Page 108  |  Page 109  |  Page 110  |  Page 111  |  Page 112  |  Page 113  |  Page 114  |  Page 115  |  Page 116  |  Page 117  |  Page 118  |  Page 119  |  Page 120  |  Page 121  |  Page 122  |  Page 123  |  Page 124  |  Page 125  |  Page 126  |  Page 127  |  Page 128  |  Page 129  |  Page 130  |  Page 131  |  Page 132  |  Page 133  |  Page 134  |  Page 135  |  Page 136  |  Page 137  |  Page 138  |  Page 139  |  Page 140  |  Page 141  |  Page 142  |  Page 143  |  Page 144  |  Page 145  |  Page 146  |  Page 147  |  Page 148  |  Page 149  |  Page 150  |  Page 151  |  Page 152  |  Page 153  |  Page 154  |  Page 155  |  Page 156  |  Page 157  |  Page 158  |  Page 159  |  Page 160  |  Page 161  |  Page 162  |  Page 163  |  Page 164  |  Page 165  |  Page 166  |  Page 167  |  Page 168  |  Page 169  |  Page 170  |  Page 171  |  Page 172  |  Page 173  |  Page 174  |  Page 175  |  Page 176  |  Page 177  |  Page 178  |  Page 179  |  Page 180  |  Page 181  |  Page 182  |  Page 183  |  Page 184  |  Page 185  |  Page 186  |  Page 187  |  Page 188  |  Page 189  |  Page 190  |  Page 191  |  Page 192  |  Page 193  |  Page 194  |  Page 195  |  Page 196  |  Page 197  |  Page 198  |  Page 199  |  Page 200  |  Page 201  |  Page 202  |  Page 203  |  Page 204  |  Page 205  |  Page 206  |  Page 207  |  Page 208