Larval structures and bionomics of Semijulistus spectabilis (Coleoptera: Rhadalidae)

This dataset contains the digitized treatments in Plazi based on the original journal article Asano, Makoto (2026): Larval structures and bionomics of Semijulistus spectabilis (Coleoptera: Rhadalidae). Acta Entomologica Musei Nationalis Pragae 66 (1): 69-73, DOI: 10.37520/aemnp.2026.006, URL: doi.org/10.37520/aemnp.2026.006 Abstract. Morphology of mature larvae and life cycle of Semijulistus spectabilis (Lewis, 1895) (Coleoptera: Rhadalidae) are described here for the first time.

A comparative analysis of the larval morphology of S. spectabilis and other rhadalid species revealed that the larvae of S. spectabilis lacked the typical characteristics observed in other rhadalid species, i.e., pigmented and sclerotized (whole or partial) thoracic tergites, abdominal tergite IX bearing a pair of urogomphi or a pigmented sclerite. Furthermore, S. spectabilis exhibits distinctive characteristics that deviate markedly from the fundamental larval morphology typical of the melyrid lineage, including a small head capsule, a slender body, and an exceptionally thin cuticle.