Solarioconulus kachchhensis, Szabó & Jaitly, 2019
publication ID |
https://doi.org/10.17111/FragmPalHung.2019.36.3 |
DOI |
https://doi.org/10.5281/zenodo.16783151 |
persistent identifier |
https://treatment.plazi.org/id/196687DD-A209-FFE0-57E2-F987FCDCF997 |
treatment provided by |
Felipe |
scientific name |
Solarioconulus kachchhensis |
status |
sp. nov. |
Solarioconulus kachchhensis View in CoL n. sp.
( Figs 7–11 View Figs 1–16 )
Type specimen – Holotype Inv. No.: BHU 2020I 2.
Type locality – Habo Dome , Kachchh, western India.
Type strata – Chari Formation, Callovian.
Derivation of name – From name of the larger locality area.
Diagnosis – Turbiniform shell with low protoconch and convex whorls. Suture impressed and abapically accompanied by belt of concavity, widening on last whorl as narrow ramp with indistinct outer rim. Last whorl slightly expanding and downward turning. Base convex, phaneromphalous. Peristome strongly prosocline, interrupted at suture, thin in parietal region and reflecting over umbilicus.
Material – Single shell with dense traces of ramifying borings on latest whorls.
Measurements – Inv. No.: BHU 2020I 2; H = 17.7 mm, HL = 14 mm, HP = 9.8 mm, D = 16.4 mm, W = 9 mm, apical angle: 93°, pleural angle: 82°.
Description – A turbiniform shell is available that has blunt apex, moderately convex whorls and a convex base. The initial chamber of the protoconch just feebly rises above the first, almost planispiral whorl then the coiling rapidly changes into clearly trochospiral. Teleoconch whorls are initially almost flat then increasingly convex; from the penultimate whorl, a narrow and shallow concave belt is formed subsuturally; the suture is slightly impressed. Base as a whole and also its wall are convex with arched transition towards the outer whorl surface; a narrow umbilicus with rounded rim is present. Near the peristome, the last whorl slightly deviates downward, and the subsutural concave belt widens as a ramp without distinct abaxial rim. The peristome is suborbicular, prosocline and tangentially joins to the last whorl. Its parietal lip appears as thin callosity, the other parts are rather thick but outward tapering. The umbilical lip and the adaxial part of the basal lip form a narrow, lunuliform and feebly concave outer face.
The shell is smooth, some marked collabral ridges appear only near the peristome but they may have been grown during reparation of a shell damage. The growth lines are very fine, like in other ataphrids; actually, some pieces are observable only partly owing to a dense network of a shallow boring system on the surface of the shell.
Remarks – Morphology of the available specimen well matches with the diagnosis of Solarioconulus Cossmann, 1918 . The main difference from the type species is that it has acute, feebly coeloconoidal early whorls, which are simply conoidal in the Kachchh species. The shell is very similar also to Buckmanina Cossmann, 1920 but the thickened peristome, which is continuous also at the parietal part, distinguishes it. The morphology of these genera is close to those of some ataphrid genera, which explains the opinion about the family attribution.
Occurrence – Habo Dome, Chari Formation, Callovian.
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.
Kingdom |
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Phylum |
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Class |
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SubClass |
Archaeogastropoda |
Order |
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SuperFamily |
Ataphroidea |
Family |
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Genus |