Xyleborus umbratus Eggers, 1941b: 223.
Cyclorhipidion umbratum (Eggers): Wood and Bright, 1992: 704.
3.8−4.1 mm long (mean = 4.0 mm; n = 4); 2.53−2.86 times as long as wide. This species is distinguished by the large size; truncate declivity surrounded by a granulate circumdeclivital costa; pronotum subquadrate from dorsal view (type 3); declivital interstrial punctures replaced by a single row of tubercles; declivital strial punctures large, distinct; declivital face with 3 striae, feebly sulcate on basal 1/4, surface smooth; and declivital striae clearly, uniformly impressed; and interstriae inflated.
Cyclorhipidion amasoides, C. amputatum, C. circumcisum, C. muticum, C. trucaudinum, all of which are large and have an obliquely truncate or truncate declivity
only known from Lithocarpus (Fagaceae) (Smith et al. 2020b)
specimens not available for sequencing