Lautoconus,

Harzhauser, Mathias & Landau, Bernard, 2016, A revision of the Neogene Conidae and Conorbidae (Gastropoda) of the Paratethys Sea, Zootaxa 4210 (1), pp. 1-178: 97

publication ID

http://doi.org/10.11646/zootaxa.4210.1.1

publication LSID

lsid:zoobank.org:pub:D39416B8-CF85-440B-84C2-D4380BECC4E3

persistent identifier

http://treatment.plazi.org/id/373F87D7-FFFF-FFEE-FF5F-A8CAFB7945D4

treatment provided by

Plazi

scientific name

Lautoconus
status

 

Lautoconus  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 22AView FIGURE 22 1View 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 2013.213View Materials), 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)

Kingdom

Animalia

Loc

Lautoconus

Harzhauser, Mathias & Landau, Bernard 2016
2016
Loc

Monteiroconus mercati (

Brocchi 1814
1814
Loc

Monteiroconus mercati (

Brocchi 1814
1814