Cryphalus striatulus

Distinguished from similar Cryphalus species by the presence of fine striations on the elytra, as indicated by the specific epithet. Separation from other pygmy borers in the former Cryphalini (now distributed across three tribes) requires examination of subtle morphological characters, including pronotal shape, declivital sculpture, and antennal club structure. The 2019 revision of Cryphalini provides updated diagnostic criteria for genus-level placement.

Minute bark beetle, likely under 2 mm in length based on genus characteristics. The specific epithet suggests fine longitudinal striations (striatulate sculpturing) on the elytra. Cryphalus species generally have compact, cylindrical bodies typical of bark beetles, with reduced wing venation and short, clubbed antennae.

Bark beetle; inhabits the phloem layer of woody plants. Specific host associations for C. striatulus are not documented in available sources.

Distribution records are sparse. The species was described by Browne in 1981, suggesting a tropical or subtropical origin based on the author's geographic focus, but precise locality data are not provided in available sources.

As a bark beetle, likely functions as a primary or secondary colonizer of woody plant tissue, contributing to nutrient cycling in forest ecosystems. Specific ecological impacts are undocumented.

• Cryphalus dorsalisAnother minute Cryphalus species illustrated in comparative studies of pygmy borers; differs in elytral sculpturing and declivital shape
• Hypothenemus eruditusFormerly placed in the same tribe (Cryphalini) but now classified separately; similar size but differs in pronotal and antennal characters
• Ernoporus parvulusComparable pygmy borer of similar size; distinguished by antennal club structure and elytral declivity

• BugGuide
• GBIF taxonomy match
• Catalogue of Life
• Bark Beetles With Identity Issues: Reclassifying the Cryphalini