Acharax doderleini ( Mayer, 1861 )

Kiel, Steffen & Taviani, Marco, 2018, Chemosymbiotic bivalves from the late Pliocene Stirone River hydrocarbon seep complex in northern Italy, Acta Palaeontologica Polonica 63 (3), pp. 557-568 : 558

Acharax doderleini ( Mayer, 1861)

Fig. 2 .

1861 Solenomya doderleini sp. nov; Mayer 1861: 364.

1901 Solenomya doderleini Mayer ; Sacco 1901: 128–129, pl. 27: 1–4.

2011 Acharax doderleini (Mayer) ; Taviani et al. 2011: figs. 3.3, 3.4, 3.8, 4.1, 4.2.

Material.— Three specimens: the most complete is a right valve embedded in rock matrix ( MGGC.22007), 41 mm long; further complete and fragmentary specimens were seen in the field. All from the late Pliocene of Italy, Stirone seep complex .

Remarks. —The first documentation for this species at the Stirone seep complex is an articulated shell with remains of periostracum found in situ next to the main limestone block in 1997 ( Taviani et al. 2011: fig. 6); other shells, highly decalcified, have been later recorded within smaller poorlylithified lucinid mudstone a few meters above ( Cau et al 2015: fig. 8). This species and other deep-water Acharax from the Italian Neogene have been discussed in detail earlier ( Taviani et al. 2011).

Stratigraphic and geographic range.—Miocene to late Pliocene of northern Italy ( Taviani et al. 2011).

Figures

Fig. 2. The solemyid bivalve Acharax doderleini (Mayer, 1861) from the late Pliocene of Italy, Stirone River seep deposit; MGGC.22007 view on exterior of right valve.