"The upper or basal part of the epinotum frequently has a carina, sometimes tuberculate, on each side.

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   myrmepropagandist (futurebird@sauropods.win)'s status on Sunday, 02-Feb-2025 20:29:09 JST myrmepropagandist

   I thought, in ants, the "carina" was the name for the crease of the antennal scrobes on the ants head-- but the epinotum is the last part of the covering of the thorax and now it has a carina too? is this just saying there are tube shaped grooves on the epinotum?

   Head of Acromyrmex lundi. Image from book on "gardening ants"