52


Journal of Paleontology 91(1):25–72


Type species.—Unuma (Unuma) typicus Ichikawa and Yao, 1976.


Occurrence.—Lower Toarcian to upper Bathonian.


Unuma gordus Hull, 1997 Figure 11.29−11.38, ?11.45


1997 Unuma gorda Hull, p. 172, pl. 43, figs. 9, 11–12.


2003 Unuma gorda; Suzuki and Gawlick, p. 98; figs. 5.36, 6.68.


2006 Unuma gordus;O’Dogherty et al., p. 434, pl. 7, figs. 15–18. [See for complete synonymy]


2007 Unuma gorda; Gawlick et al., fig. 7.21; fig. 8.44; figs. 17.30, 18.13.


2009 Unuma gordus; Suzuki and Gawlick, p. 177, figs. 6.2A–B.


2013 Unuma gordus; Chiari et al., fig. 14n.


Unuma latusicostatus (Aita, 1987) Figure 11.21−11.26


1987


Tricolocapsa latusicostata Aita, p. 76, pl. 4, figs. 7a–8b; pl. 10, figs. 8–9.


1995b Unuma latusicostatus; Baumgartner et al., p. 622, pl. 4058, figs. 1–4.


2012 Unuma latusicostatus; Goričan et al., pl. 1, fig. 30. Genus Quarticella Takemura, 1986


2009 Minutusolla Yeh, p. 72. Type species.—Quarticella ovalis Takemura, 1986


Other species.—Minutusolla yaoi Yeh, 2009; Quarticella dura Takemura, 1986; Stichocapsa cicciona Chiari, Marcucci, and Prela, 2002.


Emended diagnosis.—We consider under this genus only those species possessing a latticed fourth inflated segment with somewhat spiny surface, but never with long and stout spines.


Occurrence.—Upper Aalenian−upper Bathonian.


Quarticella cicciona (Chiari, Marcucci, and Prela, 2002) Figure 9.56


2002 2006


Stichocapsa cicciona Chiari, Marcucci, and Prela, p. 76, pl. 3, figs. 8−12.


Stichocapsa cicciona;O’Dogherty et al., p. 441, pl. 6, fig. 36.


Quarticella ovalis Takemura, 1986 Figure 9.52


1986 Quarticella ovalis Takemura, p. 58, pl. 8, figs. 17−21.


1995b Quarticella ovalis; Baumgartner et al., p. 466, pl. 4078, figs. 1−3.


2003 Quarticella ovalis; Suzuki and Gawlick, p. 199, fig. 5.40.


2005a Quarticella ovalis; Nishihara and Yao, fig. 2.24. 2008 Quarticella ovalis; Auer et al., fig. 9.57. 2009 Quarticella ovalis; Suzuki and Gawlick, figs. 5.23 A–B.


Quarticella sp. A Figure 9.58


Remarks.—This specimen differs from Q. ovalis by having a smooth surface and more regular arrangement of pores. Circular pores are surrounded by polygonal pore frames. Very small pyramidal spines occur at vertices.


Quarticella sp. B Figure 9.29−9.30


?1985 Stichocapsa sp. B Yamamoto et al., pl. 7, fig. 6.


Remarks.—These specimens differ from Q. ovalis by having meshwork of larger and equally sized pores. Distal segment has a wide aperture with characteristic flat rim.


Quarticella sp. C Figure 9.54−9.55


1997 Sethocapsa? sp. D Yao, fig. 542.


1982 Stichocapsa (?) sp. α Mizutani and Koike, pl. 2, figs. 1, 2a–b.


1982 Stichocapsa (?) sp. A Wakita, pl. 3, fig. 8.


Remarks.—This species is very similar to Quarticella sp. D, but bears a row of tubercles in the equatorial part of the inflated postabdominal segment.


Quarticella sp. D Figure 9.57


Remarks.—This species differs from Q. ovalis by having a smooth surface without spines and regular arrangement of circular pores.


Genus Yamatoum Takemura, 1986 Type species.—Yamatoum elegans Takemura, 1986.


Other species.—Quarticella conica Takemura, 1986; Quarticella levis Takemura, 1986; Quarticella? quinaria Takemura, 1986; Quarticella spinosa Takemura, 1986; Yamatoum atlanticum O’Dogherty, Goričan, and Dumitrica in O’Dogherty et al., 2006; Yamatoum caudatum Takemura, 1986; Yamatoum connicinum Takemura, 1986; Yamatoum komamiensis Takemura, 1986; Yamatoum spinosum Takemura, 1986.


Emended diagnosis.—Yamatoum is emended in order to include spindle-shaped forms with a large abdomen armed with numerous (three or more) radiate equatorial spines and, when preserved, a strong (frequently tapered to branched) terminal spines. The last inverted conical


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