Hipponix sulcatus ( Borson, 1820 )

Sacchetti, Claudia, Landau, Bernard & Ávila, Sérgio P., 2023, The Lower Pliocene marine gastropods of Santa Maria Island, Azores: Taxonomy and palaeobiogeographic implications, Zootaxa 5295 (1), pp. 1-150 : 39-40

publication ID

https://doi.org/ 10.11646/zootaxa.5295.1.1

publication LSID

lsid:zoobank.org:pub:F3A52660-70B8-439F-A7A0-F45ADC975EA5

DOI

https://doi.org/10.5281/zenodo.7975796

persistent identifier

https://treatment.plazi.org/id/03CF879C-2C34-0962-FF1D-F9EBFA27723B

treatment provided by

Plazi

scientific name

Hipponix sulcatus ( Borson, 1820 )
status

 

Hipponix sulcatus ( Borson, 1820) View in CoL

Plate 2 G View PLATE 2 1 -G View PLATE 1 3 View PLATE 3

* Patella sulcata Borson 1820: 185 .

Hipponyx [sic] granulatus de Basterot 1825: 62 View in CoL , pl. 4, fig. 14.

Pileopsis granulosa Grateloup 1836: 279 , pl. 1, figs. 29-30.

Pileopsis granulosa Grat. —Grateloup 1847: 1, figs. 29-30.

Hipponyx sulcatus Borson View in CoL — Mayer 1864: 54.

Gadinia sulcata (Borson) —Cossmann 1895: 145, pl. 6, figs. 20-22.

Amalthea? sulcata (Bors.) —Sacco 1895: 44, pl. 5, fig. 24.

Amalthea? sulcata var. pyramidata Sacco 1895: 45 , pl. 5, fig. 25.

Amalthea? sulcata var. subcrenulata Sacco 1895: 45 , pl. 5, fig. 26.

Amalthea? sulcata var. plioparva Sacco 1895: 45 , pl. 5, fig. 27.

Amalthea? sulcata var. dertonatulina Sacco 1895: 45 , pl. 5, fig. 28.

Hipponyx [sic] sulcatus (Borson) —Cossmann & Peyrot 1919: 522, pl. 14, fig. 64, pl. 15, figs. 12-15.

Hipponyx [sic] sulcatus (Borson) View in CoL — Lozouet et al. 2001: 40, pl. 15, fig. 3.

non Amalthea sulcata Borson, 1820 — Glibert 1949: 20, pl. 12, fig. 13 (= Hipponix helveticus Cossmann & Peyrot, 1919 ).

non Hipponix sulcatus ( Borson, 1820) View in CoL — Chirli & Linse 2011: 93, pl. 27, fig. 3. [= Hipponix bistriatus ( Grateloup, 1827) View in CoL ].

Santa Maria material examined. Maximum height 5.3 mm, diameter 14.0 mm. DBUA-F 937-1 (1), DBUA-F 469- B (1), Ponta do Castelo, Santa Maria Island, Azores, Touril Complex, Lower Pliocene.

Description. Shell medium sized, solid, relatively depressed, patelliform, with an elliptical profile. Protoconch eroded in all specimens. Apex placed just posterior to center. Dorsal sculpture of rounded ribs (74 in Azorean specimen) of equal strength, cut by numerous concentric growth lines, making ribs tuberculose. Ventral aspect smooth, except for horse-shoe shaped muscle scar.

Discussion. A single well-preserved Hipponix specimen from the Azores is identical to specimens of Hipponix sulcatus ( Borson, 1820) , which was originally described from the Lower-Middle Miocene of the Colli Torinesi, Italy (NHMW collection). Cossmann & Peyrot (1919: 524) correctly noted that the Atlantic Lower-Middle Miocene Aquitanian-Langhian specimens from the Aquitaine Basin of France were identical to those from the Colli Torinesi (see also Lozouet et al. 2001: 40, pl. 15, fig. 3). These specimens are characterised by having coarse radial ribs strengthening toward the periphery and an apex placed on the dorsum just posterior to center. Glibert (1959: 201), considered the Atlantic Middle Miocene Langhian specimens from the Loire Basin conspecific.Numerous specimens at hand from several localities in the Loire Basin (Ferrière-Larçon, Pauvrelay, Mathelan: NHMW collection) suggests this is not correct. Apart from being smaller, as noted by Cossmann & Peyrot (1919) and Glibert (1959), the radial sculpture is finer, and the apex is more pointed and placed far more posteriorly, and in fully adult specimen, overhangs the posterior margin. These differences were already noted by Cossmann & Peyrot (1919: 324), who erected the variety helvetica for the Loire Basin form. We agree with Peyrot (1938: 88), in separating these smaller specimens, and elevate the name to full-species rank: Hipponix helveticus Cossman & Peyrot, 1919 .

Although a predominantly Lower and Middle Miocene Atlantic species, Sacco (1895), reported it from the Upper Miocene of Italy and the single Lower Pliocene Italian locality of Bussana Vecchia, Imperia, Liguria. We are not aware of any subsequent Pliocene references to the species, and it is not present in the Pliocene of the Estepona Basin. Hipponix bistriatus ( Grateloup, 1827) , which does occur in the Estepona Basin deposit ( Landau et al. 2004a: 69, pl. 18, fig. 2), differs in being less depressed, in having the apex overhanging the posterior margin, and finer axial sculpture consisting of ribs of alternating strength. Hipponix explicatus Landau, Marquet & Grigis, 2004a , also from the Estepona assemblages, is characterised by a peculiar shell without axial sculpture and a strongly disjunct last whorl, quiet unlike H. sulcatus , H. bistriatus or H. helveticus .

Chirli & Linse (2011: 93, pl. 27, fig.3) illustrated a specimen from the Pleistocene of Rhodes Island as H. sulcatus . The specimen illustrated is far less depressed than usual for the species, the apex is placed at the posterior margin and there is a secondary rib between each primary. It probably represents H. bistriatus .

Hipponix sulcatus seems to have survived into the early Pliocene in the Mediterranean, now known from a single locality in Italy (Sacco 1895), and in the Atlantic, in the Azores (this paper). These records probably represent relict populations that did not survive the cooling events at the end of MPPMU1.

Distribution. Lower Miocene: Atlantic (Aquitanian and Burdigalian), Aquitaine Basin, France (de Basterot 1825; Grateloup 1836, 1847; Cossmann & Peyrot 1919; Lozouet et al. 2001); central Proto-Mediterranean, Colli Torinesi, Italy ( Borson 1820; Sacco 1895). Upper Miocene: central Proto-Mediterannean, Italy (Sacco 1895). Lower Pliocene: Atlantic, Santa Maria Island, Azores ( Mayer 1864); central Mediterranean, Italy (Sacco 1895).

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Littorinimorpha

SuperFamily

Hipponicoidea

Family

Hipponicidae

Genus

Hipponix

Loc

Hipponix sulcatus ( Borson, 1820 )

Sacchetti, Claudia, Landau, Bernard & Ávila, Sérgio P. 2023
2023
Loc

Hipponyx [sic] sulcatus (Borson)

Lozouet, P. & Lesport, J. F. & Renard, P. 2001: 40
2001
Loc

Hipponyx sulcatus

Mayer, K. 1864: 54
1864
Loc

Pileopsis granulosa

Grateloup, J. P. S. de 1836: 279
1836
Loc

Hipponyx [sic] granulatus de Basterot 1825: 62

Basterot, B. de 1825: 62
1825
Loc

Patella sulcata

Borson, S. 1820: 185
1820
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