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A Karethraichnus boring on a turtle shell bone from the Miocene of Italy is assessed as the attachment scar of a platylepadid symbiont
Collareta, A.; Merella, M.; Bosselaers, M.; Casati, S.; Di Cencio, A.; Bianucci, G. (2022). A Karethraichnus boring on a turtle shell bone from the Miocene of Italy is assessed as the attachment scar of a platylepadid symbiont. N. Jb. Geol. Paläont. Abh. 303(3): 327-337. https://dx.doi.org/10.1127/njgpa/2022/1052
In: Jagt, J.W.M. Neues Jahrbuch für Geologie und Paläontologie. Abhandlungen. E. Schweizerbart'sche Verlagsbuchhandlung: Stuttgart. ISSN 0077-7749
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Cheloniidae Oppel, 1811 [WoRMS]; Coronuloidea Leach, 1817 [WoRMS]; Platylepadidae Newman & Ross, 1976 [WoRMS]
    Marien/Kust
Author keywords
    Cheloniidae; Coronuloidea; epibiosis; evolution; Karethraichnus lakkos; palaeoichnology; Platylepadidae; sea turtles; Tortonian; turtlebarnacles
Auteurs  Top 
  • Collareta, A.
  • Merella, M.
  • Bosselaers, M.
  • Casati, S.
  • Di Cencio, A.
  • Bianucci, G.
Abstract
    Among the turtle and whale barnacles, those included in the family Platylepadidae are mostly found partly embedded in the carapace and plastron of sea turtles. As a likely consequence of their fragile shell, the fossil record of these cirripede epizoans of marine chelonians is currently limited to two occurrences of Platylepas in Pleistocene strata. Here, we describe and refer to Karethraichnus cf. lakkos an isolated boring on a fossil cheloniid costal plate from the upper Miocene Arenaria di Ponsano Formation of Tuscany (central Italy). A scrutiny of palaeontological and neontological literature as well as new first-hand observations reveal that this boring was most likely produced by a platylepadid barnacle similar to Stomatolepas, Stephanolepas or Platylepas. Two other probable platylepadid attachment scars, both of which incise cheloniid shell bones, are noted from the Oligocene and Miocene, respectively. On the whole, these scanty data support the hypothesis that platylepadids have ancient evolutionary roots and a long story of symbiosis with sea turtles. Future research efforts in this field should focus on 1) further investigating the potential of bone damage of turtle-dwelling barnacles; 2) initiating a methodical quest for possible platylepadid attachment scars in Cenozoic marine turtle fossils; and 3) replenishing the still fragmentary Palaeogene fossil record of Coronuloidea.
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