Crococapsa uterculus (Parona, 1890)
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publication ID |
https://doi.org/ 10.35463/j.apr.2022.02.06 |
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persistent identifier |
https://treatment.plazi.org/id/EE35878D-0E55-AA0B-54AF-FA3BFDEAFEAF |
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treatment provided by |
Felipe |
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scientific name |
Crococapsa uterculus (Parona, 1890) |
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Crococapsa uterculus (Parona, 1890)
Figs. 12 View Fig e-h, ha; text-fig. 2
1890 Theocapsa uterculus Parona , p. 168, pl. 5, fig. 17.
1975 Sethocapsa sp. cf. Theocapsa uterculus Parona – Foreman, p. 617, pl. 21, figs. 21, 22.
1978 Sethocapsa sp. cf. Theocapsa uterculus Parona – Foreman, p. 749, pl. 2, fig. 8.
1981 Sethocapsa sp. cf. Theocapsa uterculus Parona – Kanie et al., pl. 1, fig. 12.
1981 Sethocapsa uterculus (Parona) – Schaaf, p. 437, pl. 5, figs. 8a, b; pl. 26, figs. 5a, 5b.
1981 Sethocapsa sp. cf. Theocapsa uterculus Parona – Kanie et al., pl.1, fig. 12-
1982 Sethocapsa uterculus (Parona) – Okamura & Uto, pl. 3, fig. 15.
1984 Sethocapsa uterculus (Parona) – Baumgartner, p. 784, pl. 8, fig. 15.
1984 Sethocapsa uterculus (Parona) – Schaaf, p. 150, figs. 1a, b, 3a, b, 4, non 2a-c.
1984 Sethocapsa uterculus (Parona) – Yao, pl. 4, fig. 1.
1985 Sethocapsa uterculus (Parona) – Kiminami et al., pl. 2, fig. 12.
1986 Sethocapsa uterculus (Parona) – Suyari, pl. 4, figs. 1, 2.
1987 Sethocapsa uterculus (Parona) – Kito, pl. 2, fig. 1.
1989 Sethocapsa uterculus (Parona) – Tumanda, p. 39, pl. 5, fig. 7.
1991 Sethocapsa uterculus (Parona) – Aguado et al., text-fig. 7.12.
1992 Sethocapsa uterculus (Parona) – Matsuoka, pl. 1, fig. 4, non pl. 2, fig. 9 = Crococapsa kitoi (Jud, 1994) .
non 1992 Sethocapsa uterculus (Parona) – Steiger, p. 63, pl. 17, fig. 14 = Crococapsa kitoi Jud, 1994 .
1992 Sethocapsa uterculus (Parona) – Taketani & Kanie, text-fig. 5.4.
1994 Sethocapsa uterculus (Parona) – Jud, p. 106, pl. 20, figs. 15, 16.
1994 Sethocapsa uterculus (Parona) – Goričan, p. 87, pl. 15, figs. 11-15.
1994 Sethocapsa uterculus (Parona) – O’Dogerty, p. 198, pl. 30, figs. 12-16.
1995 Sethocapsa uterculus (Parona) sensu Foreman – Baumgartner et al., p. 504, pl. 5462.
2002 Hiscocapsa uterculus (Parona) – Suzuki et al., p. 60, fig. 4.5.
2003 Hiscocapsa uterculus (Parona) – Zyabrev et al., fig. 3.27.
2009 Hiscocapsa uterculus (Parona) – Ishii et al., pl. 20, fig. 15.
2014 Hiscocapsa uterculus (Parona) – Robertson et al., fig. 10(A).
2017 Hiscocapsa uterculus (Parona) – Xu & Luo, fig. 5.I. Studied material. Seven illustrated specimens in OZ825, OZ834 and OZ836, coll. MGP-PD, stub PD120-OZ825- R12-13 and 24, PD120-OZ834-R09-10 and 36, PD120- R10-18 and 21, and PD120-OZ836-R08-29.
Dimensions. Length of shell 154-184 µm, of postabdomen 92-116 µm, diameter of postabdomen 104-142 µm.
Remarks. As one can see from the specimens published to date, this species presents a rather wide variability. The most variable is the abdomen. It can be a simple segment, a little larger in diameter than the thorax, forming a conical body together with the cephalis and thorax ( Fig. 12e View Fig ), but usually it expands very much laterally, forming a flat ring-shaped segment ( Fig. 12g, h View Fig ) similar to the segment illustrated by Rüst (1898, p. 46, pl. 14, fig. 10) in Sethocapsa crucigera , that seems to be a junior synonym of C. uterculus (see Jud, 1994, p. 106). A special characteristic of this taxon is also represented by the postabdominal segment that, in lateral view, is very well separated from the abdomen by a deep constriction. In oblique apical view this constriction can be seen to correspond to the ring of ocelli at the contact of the postabdominal segment with the abdominal one ( Figs. 12f View Fig , fa). The cast of this species (Text-fig. 2) shows that the ocelli are vertically opened because the abdomen is partly submerged in the postabdominal cavity and the real contact between the two segments is at the base of the abdomen. As a consequence, the ocelli form a rather long tube between the wall of the partly hidden abdomen in the postabdominal cavity and the postabdominal wall. In lateral view the length of these tubes is well marked on the surface of the shell by large frames of a circumferential row of small pores characteristic of this species.
Range. Abundant from Berriasian to lower Aptian, UAZ 6-35 of Jud ( 1994), cosmopolitan.
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