Figure 3: Crustacean fragments from upper Carboniferous bitumen clast.
From: Crustaceans from bitumen clast in Carboniferous glacial diamictite extend fossil record of copepods
(a) Unknown crustacean: pair of biramous trunk limbs showing two-segmented rami; endopod on left side missing; exopod incomplete on right side; note incomplete annulations. (b) Maxilla of possible copepod. (c) Large appendage fragment, possibly an endite, of unknown crustacean. (d) Large appendage fragment of uniramous trunk limb with curved claw. (e) Allobasis of antenna (insert showing exopod) of canthocamptid copepod; asterisk indicates condyle. (f) Antennulary segment of copepod; asterisks indicate insertion scars of missing armature elements. (g) Mandibular gnathobase of copepod. (h) Modern canthocamptid antenna: explanatory key for Figures 2h, i and 3e; asterisk indicates condyle, geniculations arrowed. Scale bars, 100 μm (c, d), 50 μm (a, b, e, f, h), 25 μm (g).
