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Found 2 results

  1. I feel clammy

    Misaki_cretacjapasiaet_misakcommensmollusal-2014-Palaeontology.pdf COMMENSAL ANOMIID BIVALVES ON LATE CRETACEOUS HETEROMORPH AMMONITES FROM SOUTH-WEST JAPAN AKIHIRO MISAKI, HARUYOSHi MAEDA, TARO KUMAGAE and MASAHIRO ICHIDA Palaeontology, Vol. 57, Part 1, 2014, pp. 77–95 "Lagerstatt" is not among the keywords,but some ammonites are reasonably well preserved A long while back I said here that syn-vivo encrustation might be more common in the fossil record than usually assumed . @Heteromorph
  2. classical observations

    Thought it would be nice to post an oldie(1922)** yakowecolinteractgastropcrinoidZoolAnzc1922_0291-0294.pdf The author "leans towards" Simroth's theory that commensalism (and/ or mutualism)evolved from "parabiosis*",because the gastropod can sometimes be found attached to the crinoid stele . *apparently:the simple phenomenon of attachment,without connotations about causes or substrate preference . The frequent (obligatory,almost?)co-occurence of the fossils is explained by the life-long interaction itself: when the crinoid dies,the gastropod dies. (probable naticid gastropod boreholes can be found on some "infested" crinoids) The attachment scar of the gastropod are concentric,the gastropod aperture has an excentric location,to keep the aperture covering the anal aperture of the crinoid. The erosion/(resorption?) of the anal proboscis may be due to the gastopod Small circular depressions are tentativel attributed to early ontogenetic failed predation attempts by juvenile gastropod **and I am aware of the more recent literature on this subject havent read yet
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