Trimeresurus lanna sp. nov. in preservative. Specimen AUP-00180 (holotype, adult male): A Dorsal view of the head; B Ventral view of the head; C Lateral view of the head, right side; D General dorsal view. Specimen CAS 240640 (adult male): E Lateral view of the head, right side; F Lateral view of the head, left side; G Dorsal view of the head; H Hemipenis in asulcal aspect. Photos by: P. Pawangkhanant (A–D), and G. Vogel (E–H).

 
 
  Part of: Idiiatullina SS, Nguyen TV, Pawangkhanant P, Suwannapoom C, Chanhome L, Mirza ZA, David P, Vogel G, Poyarkov NA (2024) An integrative taxonomic revision of the Trimeresurus popeiorum group of pitvipers (Reptilia: Serpentes: Viperidae) with descriptions of two new species from the Indo-Burma Biodiversity Hotspot. Vertebrate Zoology 74: 303-342. https://doi.org/10.3897/vz.74.e113347