Record details

    Functional morphology of hyoliths based on flume studies
Statement of responsibility
    Ladislav Marek, Ronald L. Parsley, Arnošt Galle
    Galle, Arnošt
    Marek, Ladislav, 1928-
    Parsley, Ronald L.
Source title - serial
    Věstník Českého geologického ústavu (Bulletin of the Czech Geological Survey)
    Vol. 72, no. 4
    p. 351-358
    7 obr., 1 fot., 1 tab., 32 bibl.
    České resumé
    Zkr. název ser.: Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.)
Subject group
    evoluce biologická
    morfologie funkční
Abstract (in english)
   Flume studies on 1:1 scale models of hyolithid and orthothecid hyoliths confirm earlier work based on epibiont-encrusted hyolithid conchs that hyolithids were rheophylic and most likely were filter feeders. The ligula of hyolithids is interpreted to have accelerated current over the conch in accordance with Bernoulli's principle, and tentacles were probably deployed in the accelerated current for feeding on soft detritus and microorganisms. Hyolithids are thought to be among the earliest filter feeders in the Cambrian evolutionary fauna. In contrast to the hyolithids the orthothecids lack a ligula but have sediment-filled guts and are interpreted to have been non-rheophylic sediment ingesters
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    31. 3. 2008
Import date
    8. 8. 2012