Ahmaditermes deltocephalus Tsai & Chen, 1963 角头钝颚白蚁

Recorded in Fauna Sinica

The morphological and biological accounts below are taken from Fauna Sinica and related literature; only structure and punctuation have been standardized here.

Morphology

Soldier

Head, antennae and anterior part of the pronotum reddish brown, the nasus darker than the head, the remaining parts pale yellow. Head with a few scattered hairs; the posterior margins of the abdominal tergites and sternites each bearing a row of hairs, sparse and erect, the ventral surface densely covered with short hairs. Head nearly an equilateral triangle, narrowest at the antennal sockets, widest at the posterior end. Nasus slender and short, not more than half the length of the head, in profile the nasus and the vertex forming a slightly concave arc, the base of the nasus slightly swollen, the nasus projecting forwards and not upturned, the anterolateral end of the mandible without a spine; antennae with 13 segments, the third slightly longer than the second. Pronotum about half as wide as the head, its anterior part inclined backwards, the angle at which it meets the posterior part less than 90 degrees.

Alate

Dorsum of head, thorax and abdomen brown, the head darkest, ventral surface of the abdomen brownish yellow, wings brown; the whole body densely covered with fine hairs, the wing membrane with dense fine short hairs. Head very broad, the width at the front of the compound eyes equal to the width of the head, the posterior margin rounded; compound eyes large and round, ocelli large, elongate-oval, the distance between ocellus and compound eye less than the short diameter of the ocellus. Postclypeus slightly raised, about one quarter as long as wide, its posterior margin slightly curved backwards. Posterior part of the vertex flat, slightly concave in the middle, the fontanelle slightly in front of the midpoint of the vertex, a pale Y-shaped pit. Antennae with 15 segments, the second and third equal in length or the second slightly shorter. Pronotum narrower than the head, the anterior margin nearly straight, the posterior margin concave in the middle. Forewing: radial sector running close to the anterior margin and reaching the wing tip, media arising independently at the humeral suture and forming four branches beyond the middle, cubitus with about 11 to 12 branches; hindwing: media arising fused with the radial sector at the humeral suture.

Worker

Head deep yellow, thorax and abdomen pale yellow, the whole body covered with short hairs. Head round, its anterior part somewhat square, slightly widened at the antennal sockets; postclypeus raised, less than half as long as wide, the T-shaped suture dividing the head into three parts, the fontanelle at the junction of the longitudinal and transverse sutures, in the middle of the vertex, with several longitudinal shallow grooves in front of the T-shaped suture. Antennae with 15 segments, the second longer than the third. Anterior and posterior parts of the pronotum meeting at a right angle.

Nymph

Abstract (from the source)

Biology

Distribution and locality

Hexi, Fujian; Hainan; Mengla, Jinping, Nanxi, Pingbian, Simao, Menghai and Santaishan, Yunnan.

Taxonomic notes

Source: Huang Fusheng et al. (2000), Fauna Sinica, Insecta vol. 17, Isoptera, Science Press. (entry no. 463 in the original work) Entries are cited by their number in the original work.