. The Canadian field-naturalist. 1993 Youngman: Pleistocene Small Carnivores 147 Mephitine, Undetermined Species — Extinct Skunk Specimens Examined (1): Yukon Territory: Old Crow River Loc. 11 A: 1 humerus (NMC 48023). The occurrence of a second mephitine in Beringia is indicated by a left humerus (NMC 48023) that does not appear to be attributable to any known taxon, living or extinct. Measurements of this speci- men are: Total Length: , Breadth Proximal: , Least Shaft Breadth: , and Breadth Distal: This undated bone (Figure 4) is much larger than the only known humerus of Br
. The Canadian field-naturalist. 1993 Youngman: Pleistocene Small Carnivores 147 Mephitine, Undetermined Species — Extinct Skunk Specimens Examined (1): Yukon Territory: Old Crow River Loc. 11 A: 1 humerus (NMC 48023). The occurrence of a second mephitine in Beringia is indicated by a left humerus (NMC 48023) that does not appear to be attributable to any known taxon, living or extinct. Measurements of this speci- men are: Total Length: , Breadth Proximal: , Least Shaft Breadth: , and Breadth Distal: This undated bone (Figure 4) is much larger than the only known humerus of Brachyprotoma obtusata (Carnegie Museum, uncatalogued: TL , BP , BD , LSB ), and does not resemble the humerus of that species. NMC 48023 is within the size range of Mephitis mephitis but differs from that species in that the deltoid tuberosity is less than half the total length, rather than longer than half the total length. Also in Mephitis the tuberosity for the teres minor is larger. The apex of this bone in Mephitis mephitis occupies a position approximately one quarter of the total length of the shaft distally from the head of the humerus, and the tuberosity is plainly visible in cranial view. In NMC 48023 that tuberosi- ty is very small (the apex is less than one fifth of the total length of the bone distally from the head of the humerus). The tuberosity is not plainly visible in cra- nial view, and does not impinge on the outline of the deltoid tuberosity. Other differences can be seen in the curvature of the tricipital line, and in the propor- tions of the greater and lesser tubercles. A compari- son of size and morphology also rules out the genus Conepatus. The only Pleistocene mephitine from North America for which there are no known humeri is the taxon Osmotherium spelaeum, all specimens of which were collected from Port Kennedy Cave,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabi
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Keywords: ., bookauthorottawafi, bookcentury1900, bookdecade1910, bookyear1919
