... of molting patterns and ontogeny in the radiodont Stanleycaris based on 265 exceptionally preserved specimens from the mid-Cambrian (Wuliuan) Burgess Shale. Ranging in size from 10 to 83 mm, they constitute the most extensive radiodont ontogenetic series known. Using a novel morphospace approach, we show...

...Juan José Rustán; Diego Balseiro Abstract Some Silurian-Devonian Argentinian trilobites characterized by infaunal behavior during molting are considered. After a taxonomic reappraisal, a species previously referred to a lineage of the phacopid Paciphacops is proposed as Echidnops taphomimus new...

... to be demonstrated conclusively. We report new insights based on a striking sclerite configuration exhibited by three phacopid trilobite species, part of a late Silurian–Early Devonian Paciphacops (Paciphacops) Maksimova, 1972 , lineage. An unusual molt pattern provides compelling evidence of infaunal behavior...

..., sutural gape mode of molting separating librigenae (and doublure) and hypostome; SGM-LCU, sutural gape mode of molting with a joined lower cephalic unit; SM, Salter’s mode of molting. A number of holaspid specimens detailed in Supplementary Material 1 and 2, both with fused and unfused sutures...

...Kenneth J. McNamara; Megan E. Tuura Abstract A complete molted exoskeleton of the asteropygine phacopid trilobite Greenops widderensis Lieberman and Kloc, 1997 from the Middle Devonian (Givetian) Widder Formation in southwestern Ontario, Canada that has suffered predatory trauma provides insights...

..., internal organs, and dorsal sclerites are different, and should be treated as separate taphonomic elements. A classification scheme to delineate the preservational states is proposed here to distinguish carcasses from molts in deposits with exceptional preservation. For example, at least 35% of Kaili...

... of isoteline trilobite, “ Homotelus ” bromidensis Esker. Two horizons were excavated and oriented slabs removed for detailed study. The lower horizon is dominated by exoskeletons that have librigenae and hypostomes in place and are interpreted as carcasses rather than molts. The upper horizon is composed...

...Harold William Scott Abstract A survey of literature on fossil anti living crustacea fails to uncover a single reported case of unquestioned dwarfing. The molt stages of crustacea introduce a factor that is not ordinarily involved in the study of other invertebrates. Ostracodes pass through 7-9...