58


Journal of Paleontology 91(1):25–72


Other species.—Praeparvicingula tlellensis Carter in Goričan et al., 2006; Triversus fastigatus Hull, 1997; Triversus schardti O’Dogherty, Goričan, and Dumitrica in O’Dogherty et al., 2006; Triversus spinifer Takemura, 1986; Triversus preconicus Vishnevskaya, 1991.


Diagnosis.—Multicyrtid having three rows of circular pores by segment, which are externally weakly defined by ridges or strictures, and usually without apical horn or occasionally a very faint apical horn is present (e.g., Triversus fastigatus Hull 1997, pl. 51, fig. 5).


Occurrence.—Upper Pliensbachian to upper Bathonian.


Etymology.—In honor of our friend and colleague Prof. Atsushi Takemura, for his great contribution of the taxonomy and stratigraphy of Paleozoic and Mesozoic radiolarians.


Remarks.—Takemura (1986) emphasized the Amphipyndax- type cephalic skeletal structure of this genus as a distinction from Parvicingula. In addition, we note that Takemuraella shares with other parvicingulids the three rows of pores per segment. but it lacks the typical circumferential ridges always visible in Praeparvicingula and Parvicingula.


Takemuraella japonica (Takemura, 1986) Figure 6.49−6.50


1989 figs. B−C. 2006 Triversus japonicus;O’Dogherty et al., 434, pl. 4, fig. 3. 2013 Triversus japonicus; Chiari et al., p. 418, fig. 14k.


1986 Triversus japonicus Takemura, p. 62, pl. 16−20. not


Triversus japonicus; Hattori and Sakamoto, pl. 12,


Takemuraella schardti (O’Dogherty, Goričan, and Dumitrica in O’Dogherty et al., 2006) Figure 6.18−6.21


1997 Ristola (?) turpicula Pessagno and Whalen; Arakawa, pl. 4, fig. 18.


2006 Stichocapsa tuscanica Chiari, Cortese, and Marcucci; Danelian et al., pl. 2, fig. 8.


2006 Triversus schardti O’Dogherty, Goričan, and Dumitrica in O’Dogherty et al., p. 434, pl. 4, figs. 4−10. [See for complete synonymy]


2008 Parvicingula spinata (Vinassa de Regny); Auer et al., fig. 9.47.


2009 Triversus hexagonatus (Heitzer); Suzuki and Gawlick, p. 170, figs. 5.15; 6.11A–B.


Takemuraella sp. cf. T. schardti (O’Dogherty, Goričan, and Dumitrica in O’Dogherty et al., 2006) Figure 7.10−7.11


Remarks.—This species differs from T. schardti by having fewer segments, a wider conical shell, and larger pores.


Takemuraella spinifera (Takemura, 1986) Figure 6.22−6.24


1982 Amphipyndax sp. A Kido et al., pl. 4, figs. 1, 2. 1982 Amphipyndax (?) sp. Kojima, p. 88, pl. 1, fig. 4.


1986 Triversus spinifer Takemura, p. 63, pl. 10, figs. 21−23; pl. 11, figs. 1−2.


1987 Ristola sp. E Hattori, pl. 19, fig. 6. 1987 Triversus aff. T. spinifer Hattori, pl. 20, fig. 7. 1989 Parvicingula (?) sp. Hattori and Sakamoto, pl. 12, fig. A. 1989 Ristola spp. Hattori, pl. 14, fig. H. 1997 Parvicingula aff. spinifer; Yao, pl. 13, fig. 609. 1998 Parvicingula sp. H0 Arakawa, pl. 9, fig. 434. 2003 Parvicingula spinifer; Goričan et al., p. 297, pl. 5, fig. 5. 2004 Triversus spinifer; Matsuoka, fig. 239.


2006 Praeparvicingula? spinifera; Goričan et al., p. 338, pl. TVS01, figs. 1−5.


2012 Eoxitus spinifer (Takemura); Goričan et al., pl. 1, fig. 40.


2013 Triversus sp. cf. T. spinifer Takemura; Chiari et al., fig. 14l.


Remarks.—As in Takemuraella schardti, the presence or absence of a delicate and narrower last segment (even broken, see Fig. 6.17−18) is not considered a significant char- acteristic to separate two morphotypes belonging to different subspecies.


Family Pseudodictyomitridae Pessagno, 1977b Genus Loopus Yang, 1993


Type species.—Pseudodictyomitra primitiva Matsuoka and Yao, 1985.


Other species.—Candissa mexicana Hull, 1997; Cinguloturris? venusta Chiari, Cortese, and Marcucci in Chiari et al., 1997; Loopus doliolum Dumitrica in Dumitrica et al., 1997; Loopus doliolum martae Beccaro, 2004; Loopus yangi Dumitrica in Dumitrica et al., 1997; Pseudodictyomitra blabla Schaaf, 1981.


Occurrence.—Lower Bathonian to lower Aptian.


Remarks.—Includes generic concepts of Candissa Hull, 1997. Loopus martae Beccaro, 2004 Figure 7.64−7.66


2004 Loopus doliolum martae Beccaro, p. 13, pl. 1, figs. 3−5. 2008 Loopus doliolum martae; Beccaro et al., pl. 3, fig. 17.


Remarks.—In this paper the record of the taxon is raised to species level. This new taxonomic assignation is justified by the clear morphological distinction and different stratigraphic ranges between Loopus doliolum Dumitrica in Dumitrica et al., 1997 and Loopus martae Beccaro.


Loopus mexicanus (Hull, 1997) Figure 7.71


1997 Candissa mexicana Hull, p. 144, pl. 47, figs. 11−12, 17, 21, 24.


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