Svinitzium irregulare Dumitrică, 2022
|
publication ID |
https://doi.org/ 10.35463/j.apr.2022.02.06 |
|
persistent identifier |
https://treatment.plazi.org/id/EE35878D-0E47-AA1F-54AF-F8DDFC6DFB4A |
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treatment provided by |
Felipe |
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scientific name |
Svinitzium irregulare Dumitrică |
| status |
sp. nov. |
Svinitzium irregulare Dumitrică n. sp.
Figs. 14r, t View Fig
Description. Shell multicyrtid conico-cylindrical consisting of 6-8 or probably more segments. First four segments increase in diameter as added forming a conical body without apical horn. Cephalis and thorax smooth-surfaced, and collar boundary marked by a circumferential row of small circular pores. Following two segments, representing abdomen and first postabdominal segment,
are well inflated, costate and separated by a deep postlumbar constriction. The abdomen has a circumferential row of small circular pores, and the first postabdominal segment two parallel circumferential row of pores on the inflate portion. The following two to four segments, depending on the length of shell, have concave outline with a poreless circumferential band in the deep portion separated on both sides by high and slightly nodular circumferential crests and by a row of pores. Inner intersegmental platforms marked outside by the high circumferential and slightly nodular crest. Nodes may be separated by small shallow depressions. On the distal segments ( Fig. 14t View Fig ) the row of relict pores characteristic of the genus is not visible.
Studied material. Two specimens.
Holotype. Figure 14t View Fig , col. MGP-PD, stub PD120 -OZ834- R10-10 .
Paratype. Figure 14r View Fig , coll. MGP-PD, stub PD120 - OZ836- R08-05 .
Dimensions. Length of shell with 6 segments 171 μm, with 8 segments 212 μm, maximum diameter 103-108 μm.
Remarks. The two illustrated specimens, although different in length of test and number of segments, have similar proximal and distal parts. In the holotype, there is a transitional segment between these well distinct portions. The external strictures of the species do not correspond to the internal planiform partitions between segments but to their middle part, these partitions corresponding to the expanded parts of the segments like in the Parvicingulidae .
Etymology. From the Latin irregularis, -e = irregular.
Range and occurrence. Known only in the S’Ozzastru section.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.