Lautoconus
publication ID |
https://doi.org/ 10.11646/zootaxa.4210.1.1 |
publication LSID |
lsid:zoobank.org:pub:D39416B8-CF85-440B-84C2-D4380BECC4E3 |
DOI |
https://doi.org/10.5281/zenodo.5622369 |
persistent identifier |
https://treatment.plazi.org/id/373F87D7-FFFF-FFEE-FF5F-A8CAFB7945D4 |
treatment provided by |
Plazi |
scientific name |
Lautoconus |
status |
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Lautoconus View in CoL nov. sp. [ex. gr. bitorosus Fontannes, 1880 ]
Figs 17 G, 22A1–A3
Monteiroconus mercati ( Brocchi, 1814) .— Kovács & Vicián 2013 (partim): 78, figs 87–88 [non Monteiroconus mercati ( Brocchi, 1814) ].
Illustrated material. Figs 22A View FIGURE 22 1 View FIGURE 1 –A3, 17G: Letkés (Hungary): SL: 55.3 mm, MD: 31.9 mm, private collection Anton Breitenberger (Bad Vöslau, Austria).
Description. Medium-sized shells of subcylindrical outline. Spire very low; suture impressed. Early spire whorls smooth, weakly convex; last whorl smooth with faint central concavity. Subsutural flexure shallow, moderately curved, moderately asymmetrical. Distinctly angulated shoulder, position of maximum diameter somewhat below shoulder. Last whorl slightly ventricose, subcylindrical; weakly constricted at base. Surface smooth except for prominent spiral cords on base. Siphonal fasciole weakly swollen, twisted, separated from short inner lip by slight notch. Siphonal canal short, broad, slightly recurved. Aperture moderately narrow, widening anteriorly.
Shell measurements and ratios. SL: 55.3 mm, MD: 31.9 mm, spire angle: 130°, last whorl angle: 37°, LW: 1.73, RD: 0.65, PMD: 81, RSH: 0.11.
Discussion. Only a single specimen is available to us. However, a second specimen from the same locality, stored in the Hungarian Natural History Museum ( HNHM 2013.213 About HNHM ), was illustrated by Kovács & Vicián (2013). Both specimens are identical in outline and therefore, it is unlikely that they represent aberrant specimens. This species is reminiscent of Lautoconus bitorosus miovoeslauensis (Sacco, 1893) but differs in its subcylindrical outline, the smooth spire and the pronounced shoulder. Moreover, both species seem also to be ecologically separated. Lautoconus b. miovoeslauensis is found in offshore clays whereas the occurrence at Letkés indicates shallow marine environments with corals. Despite the numerous “varieties” described by Sacco (1893a, b), we are not aware of any comparably cylindrical morphotype. Nevertheless, we refrain from formally introducing a new species name without having seen more material.
Paleoenvironment. The locality Letkés comprises a mixed assemblage of partly reworked taxa ( Kovács & Vicián 2013); the frequent occurrence of corals suggests a shallow marine depositional environment.
Distribution in Paratethys. Badenian (middle Miocene): Pannonian Basin: Letkés ( Hungary).
HNHM |
Hungarian Natural History Museum (Termeszettudomanyi Muzeum) |
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.
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Lautoconus
Harzhauser, Mathias & Landau, Bernard 2016 |
Monteiroconus mercati (
Brocchi 1814 |
Monteiroconus mercati (
Brocchi 1814 |