Plagioconus elatus ( Michelotti, 1847 ),

Harzhauser, Mathias & Landau, Bernard, 2016, A revision of the Neogene Conidae and Conorbidae (Gastropoda) of the Paratethys Sea, Zootaxa 4210 (1), pp. 1-178: 132-133

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-FF1C-FF0A-FF5F-AF17FE76462B

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Plazi

scientific name

Plagioconus elatus ( Michelotti, 1847 )
status

 

Plagioconus elatus ( Michelotti, 1847) 

Figs 30 H, 32A1–A3, 32B1–B2

Conus elongatus  nobis—Borson 1820: 198, pl. 1, fig. 4 [non Conus elongatus Holten, 1802  ].

Conus elatus  mihi—Michelotti 1847: 341, pl. 13, figs 16–16’.

Conus Haueri Partsch—Hörnes 1851: 34  (partim), pl. 4, figs 4a –b? [non fig. 5 = Plagioconus  puschi ( Michelotti, 1847)  ].

Conus (Leptoconus) Haueri Partsch—Hoernes & Auinger 1879: 33  (partim).

[ Conus  ] Leptoconus elatus (Micht.)  — Sacco 1893a: 35.

Conus (Leptoconus) haueri (Partsch in Hörnes 1856)  —Kojumdgieva in Kojumdgieva & Strachimirov 1960: 210, pl. 49, fig. 1.

Conus (Chelyconus) austriaconoae Sacco 1893  —Kojumdgieva in Kojumdgieva & Strachimirov 1960: 212, pl. 50, fig. 2 [non Conus austriaconoe d’Orbigny, 1852  ].

Conus elongatus Borson—Pavia 1976: 157  , pl. 2, fig. 11.

Conus (Leptoconus) elongatus Borson, 1820  — Bałuk 2006: 216, pl. 16, fig. 8.

Plagioconus elatus ( Michelotti, 1847)  — Tucker & Tenorio 2009: 111, pl. 6, fig. 5.

Type material. Syntype or holotype illustrated by Michelotti (1847, pl. 13, fig. 16), Tortona, Italy; the specimen might have been stored in the collections of the Dipartimento di Scienze della Terra, Sapienza Università di Roma but parts of the Michelotti collection were destroyed during WWII ( Manni 2005); type specimen is lost according to Hall (1966); late Miocene, Tortonian. 

Studied material. 1 spec. NHMW 1997z0178/1471, 1 spec. NHMW 1856/0050/0114, 4 spec. NHMW 1855/ 0045/0367, 1 spec. NHMW 1997View Materials z0178/1473, Gainfarn ( Austria); 1 spec  . NHMW 1846View Materials /0037/0023, Grinzing ( Austria). 

Illustrated material. Figs 32AView FIGURE 32 1View FIGURE 1 –A3: Gainfarn ( Austria): SL: 91.6 mm, MD: 38.4 mm, NHMW 1855/0045/ 0367; Figs 30 H, 32B1–B2: Grinzing ( Austria): SL: 103.8 mm, MD: 37.3 mm, NHMW 1846/0037/0023.

Revised description. Large shells; spire short with coeloconoid outline. Teleoconch comprising at least 12 whorls; early spire whorls beaded, rounded or with weak angulation in the middle, migrating towards lower suture on last whorls. Suture deeply incised, emphasized by weak subsutural inflation; delicate spiral threads appear on sutural ramp. Subsutural flexure deep, moderately curved, strongly asymmetrical. Last whorl slightly allometric in growth due to rapid widening of last two whorls. Sutural ramp relatively shallow and wide, distinctly shouldered at periphery, whorl straight below, hardly constricted at base. Aperture narrow; siphonal canal of moderate length and width; not recurved or twisted. Narrow, flattened inner lip demarcated from short fasciole by distinct notch. No spiral grooves on base. No colour pattern is preserved.

Shell measurements and ratios. n = 8 adult and subadult specimens: largest specimen: SL: 103.8 mm, MD: 39 mm, mean SL: 87.9 mm (σ = 8.1), mean MD: 35.4 mm (σ = 2.6), spire angle: µ = 82.4° (σ = 3.3°), last whorl angle: µ = 24.5° (σ = 1.2°), LW: µ = 2.48 (σ = 0.15), RD: µ = 0.50 (σ = 0.03), PMD: µ = 0.96 (σ = 0.01), RSH: µ = 0.19 (σ = 0.02).

Discussion. This species was frequently treated as Conus elongatus Borson, 1820  (e.g. Hall 1966; Davoli 1972; Bałuk 2006). This name, however, is preoccupied by C. elongatus Holten, 1802  and consequently C. elatus Michelotti, 1847  is the next available name. In the Paratethys, it was identified as Conus haueri Hörnes, 1851  , which is a problematic species. The syntype illustrated by Hörnes (1851, pl. 4, fig. 4) is lost and the spire whorls of the illustration display a weak concavity as typical for Monteiroconus antiquus  . The syntype illustrated by Hörnes (1851, pl. 4, fig. 5) is still preserved in the NHMW collection and is a specimen of Plagioconus  puschi  . The syntype of Conus haueri  from Grinzing mentioned by Hörnes (1851, not illustrated) and all other shells identified as C. haueri  in the NHMW collection agree fully with Plagioconus elatus ( Michelotti, 1847)  as understood by Hall (1966). Therefore, we consider Conus haueri Hörnes, 1851 a  nomen dubium.

Paleoenvironment. All Austrian specimens were found in assemblages from shallow sublittoral settings (e.g. Zuschin et al. 2007).

Distribution in Paratethys. Badenian (middle Miocene): Vienna Basin: Gainfarn, Grinzing ( Austria); Pannonian Basin: Szob ( Hungary) ( Hoernes & Auinger 1879); Carpathian Foredeep: Korytnica ( Poland) ( Bałuk 2006); Dacian Basin: Opanec ( Bulgaria) ( Kojumdgieva & Strachimirov 1960).

Proto-Mediterranean Sea and northeastern Atlantic. Burdigalian ( Italy: Colli Torinesi), Tortonian ( Italy: Sant'Agata Fossili, Stazzano Montegibbio). A Pliocene occurrence from Borzoli ( Italy) was mentioned by Sacco (1893a) but needs confirmation. 

NHMW

Naturhistorisches Museum, Wien

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Neogastropoda

Family

Conidae

Genus

Plagioconus

Loc

Plagioconus elatus ( Michelotti, 1847 )

Harzhauser, Mathias & Landau, Bernard 2016
2016
Loc

Plagioconus elatus (

Tucker 2009: 111
2009
Loc

Conus (Leptoconus) elongatus

Baluk 2006: 216
2006
Loc

Conus (Leptoconus) haueri (Partsch in Hörnes 1856 )

Kojumdgieva 1960: 210
1960
Loc

Conus (Chelyconus) austriaconoae

Kojumdgieva 1960: 212
1960
Loc

Conus

Sacco 1893: 35
1893
Loc

Conus (Leptoconus) Haueri Partsch—Hoernes & Auinger 1879 : 33

Auinger 1879: 33