FIG. 13 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada

FIG. 13. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada; small and presumably juvenile, dorsoventrally collapsed individuals, showing the three "head stains"; photographed in immersion in water: A, MHNM 01-89B, single specimen, the body of which is interrupted by a break in the concretion; the sediment that fills the presumed, horizontally broken, stomach contents is extremely fine-grained, and clearly differs from that of the surrounding matrix; B, MHNM 01-126A, smallest known individual, showing a pair of stains (one of which displays a slight trace of mineralized matter) behind the "head stains". Scale bars: A, 10 mm; B, 1 mm.