Amasa Lea, 1894

Amasa Lea, 1894: 322 .

Pseudoxyleborus Eggers, 1930: 206 . Wood 1984: 223.

Anaxyleborus Wood, 1980: 90 . Wood 1983: 647.

Type species. Amasa thoracica Lea, 1894 = Tomicus truncatus Erichson, 1842

Diagnosis. Length 1.9−5.4 mm, 1.8−3.4× as long as wide. Amasa are distinguished by the truncate declivity, margined with a circumdeclivital ring; declivital face with three striae; antennal club flattened, typically type 4 with club sutures sinuate, two sutures visible on posterior face or rarely without sutures, type 5; protibiae typically slender, inflated and granulate on posterior face (rarely distinctly triangular or unarmed); anterior margin of pronotum with a row of serrations; scutellum flat, flush with elytral surface; procoxae contiguous or narrowly separated, rarely moderately separated; mycangial tufts absent; eyes deeply emarginate or rarely completely divided.

Similar genera: Xylosandrus Reitter, Cyclorhipidion Hagedorn, Pseudowebbia Browne, Truncaudum Hulcr & Cognato, and Webbia Hopkins.