Chthamalus malayensis collected from Ka Lim beach, Phuket (BUU16.CH.CM07). A. Dorsal and ventral view of external shell, B. External (left panel) and internal (right panel) view of tergum (upper panel) and scutum (lower panel), C. External (upper panel) and internal (lower panel) view of shell plates, D–G. Light microscopy on mouthparts, D. Close up of cirri I showing conical spines(↑), E. Cirri II, F. Close up on cirri II showing multi-cuspidate setae with basal guard(↓), G. Mandible with four large teeth. D-G. Scale bars in µm. Abbreviations: c, carina; cl, carinal latus; l, latus; r, rostrum.

 
 
  Part of: Pochai A, Kingtong S, Sukparangsi W, Khachonpisitsak S (2017) The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand’s coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93(1): 13-34. https://doi.org/10.3897/zse.93.10769