Genus Labiotermes · 厚唇白蚁属

Morphology

The descriptions below are an adaptation of the original genus-level accounts; terms follow the meaning of the source, and the original is not transcribed verbatim.

Diagnostic characters

Holmgren 1912 established Labiotermes as a new subgenus within Cornitermes. The alate has large compound eyes and large ocelli set close against them, antennae of 17 segments, and mandibular tooth 1 larger than tooth 2; the soldier has a relatively short frontal tube, a long labrum with a transparent, sharply delimited tip, antennae of 13–15 segments, and at most 2 teeth in the middle of the left mandible; the worker has antennae of 14–15 (16) segments and mandibular tooth 1 longer than tooth 2. The original text further divides the group into two: one with soldier antennae of 15 segments, the left mandible bearing 2 middle teeth and the basal and middle teeth of the right mandible separate; the other with the alate unknown, soldier antennae of 13 segments, the left mandible without middle teeth and the basal and middle teeth of the right mandible fused.

Alate

Compound eyes large; ocelli large, very close to the compound eyes. Antennae of 17 segments. Mandibular tooth 1 larger than tooth 2.

Soldier

Frontal tube relatively short. Labrum long, with a sharply delimited transparent tip. Mandibles robust; left mandible with at most 2 teeth in the middle. Antennae of 13–15 segments.

Worker

Antennae of 14–15 (16) segments. Mandibular tooth 1 longer than tooth 2. The original text gives only these two diagnostic features for the worker of this subgenus and does not describe the rest separately (it still falls within the generic characters of Cornitermes).

Sources: Holmgren, N. 1912. Termitenstudien 3. Systematik der Termiten. Die Familien Mastotermitidae, Protermitidae und Mesotermitidae. Kungliga Svenska Vetenskapsakademiens Handlingar 48(4): 1–166, Taf. 1–4., p. 50（archive.org 项 biostor-184513 页面图像） This text is an adaptation, not a verbatim transcription of the original.