Acharax doderleini

• Main Authors: Kiel, Steffen, Sami, Marco, Taviani, Marco
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Bivalvia; Solemyida; Solemyidae; Acharax; Acharax doderleini; sami
• Online Access: https://doi.org/10.5281/zenodo.10350811; http://treatment.plazi.org/id/C80687AB9C33FFDCFDD5FCBBFC1A6B8F

Acharax doderleini (Mayer, 1861) Fig. 8E–F Solenomya doderleini Mayer, 1861: 364–365. Solenomya doderleini – Sacco 1901: 128, pl. 27 figs 1–4. — Merlino 2007: 188, pl. 17 fig. 5. — Harzhauser et al. 2011: 221, fig. 10.1–2. — Mikuž & Gašparič 2016: 156, fig. 10.1–2. Acharax doderleini – Taviani et al. 2011: 1068, figs 4–6. Material examined ITALY – Emilia-Romagna • 3 specs; Ca’ Fornace; MSF 2360 (L = 46.4 mm), MSF 2361 (L = 53.0 mm) • 2 specs; Caselle A; NRM Mo 204848. Remarks See Mikuž & Gašparič (2014) for a more extensive synonymy. Taviani et al. (2011) re-assigned “ Solenomya ” doderleini to Acharax , which is followed here. They gave its geologic range in northern Italy as Early Miocene (Burdigalian) to Late Pliocene (Piacenzian). The new material documented here falls well within this geologic range. This species occurs mainly in deep-water marls and at methane seep deposits. Already Mayer (1861: 365) wrote “I have found this [species] in the layer with large globular Lucines , forming the base of the Tortonian stage, at Pino, near Torino”, indicating the association of this species with members of the chemosymbiotic bivalve family Lucinidae, probably Meganodontia Bouchet & Cosel, 2004 or Lucinoma Dall, 1901, as in many Calcari a Lucina seep deposits. Whilst frequently found in Mio-Pliocene deep-sea reducing sediments of the Italian Peninsula, Acharax is by contrast rarely found in Calcari a Lucina deposits (Taviani et al. 2011). In the erratics found near Ca’Fornace, A. doderleini is associated with a few specimens of the lucinid Anodontia mioinflata Kiel, Sami & Taviani, 2018. Stratigraphic and geographic range Neogene, northern Italy. Family Thyasiridae Dall, 1901 Remarks Thyasirids are generally small and rare in the Calcari a Lucina deposits. The only previous records are three specimens assigned to Channelaxinus sp. from the Ca’ Cavalmagra site (Kiel & Taviani 2017). This is a remarkable contrast to coeval seep deposits in both the Pacific and the Caribbean regions (Amano et al. ...