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snout length ~1/4 disc widthdisc top covered with denticlestail: > disc, 1 row thorns
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disc front rounded to ~straighttop covered with denticles
1 pair tubercles on shoulderstail long, no D, with low ventral keel
tail spines well to rear -
snout length ~1/3 disc widthdisc top ~no denticlestail: > disc, no row thorns