Genus Sinqasapatermes · 鼻大白蚁属

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

The distal margin of the enteric valve (P2) is not folded into the paunch (P3) but bends towards the ileum (P1), i.e. against the direction of food flow; the armature consists of a ring of 6 subequal, nearly triangular ridges, the surface of each densely covered with short spines; the armature lies on the outer surface of the cone, facing the inner wall of P1; the enteric-valve seating is trilobed and separated from the rest of P3; P3 is further subdivided.

Soldier

Monotypic. Head capsule constricted behind the antennal bases in dorsal view, greatest width behind the constriction, at the middle of the posterior lobe; in lateral view the vertex is almost straight to the base of the nasus, the base of the nasus weakly concave. Nasus narrow, conical (dorsal view), about as long as the head capsule, slightly upturned in lateral view. Mandibles reduced, without a 'point'. Postclypeus moderately arched in lateral view. Labrum wider than long, anterolateral angles rounded. Antennae 11-segmented. Pronotum shallowly saddle-shaped, anterior margin rounded and not concave. Tibial spur formula 2:2:2.

Worker

Head capsule trapezoidal in dorsal view, greatest width at the mandibular bases; fontanelle area concave, situated in the posterior third of the head capsule. Postclypeus short, moderately swollen, midline weak. Antennae 12-segmented. Pronotum shallowly saddle-shaped, anterior margin rounded and not concave. Tibial spur formula 2:2:2. Apical tooth of the left mandible as large as M1+2 or slightly more prominent, posterior margin of the apical tooth weakly concave or truncate; posterior margin of the apical tooth forming a right or acute angle with the anterior margin of M1+2; posterior margin of M1+2 straight or slightly curved; third marginal tooth reduced to a vestigial segment; molar tooth visible in the V-shaped gap, but its tip hidden by the molar prominence; ridges of the molar prominence extremely weak. Right mandible: apical tooth slightly more prominent than the first marginal tooth, second marginal tooth invisible or reduced to a minute projection; molar plate concave, ridges extremely weak; basal pit distinct. Digestive tract: the gut forms a short, wide coil in the body; crop large; gizzard with thick musculature; mesenteron passing along the right side of the body, not reaching the midline in ventral view; mesenteron–proctodeum junction circular, without a mixed segment; bases of the Malpighian tubules slightly swollen into ampullae, paired and adjacent, attached to the inner face of the junction by a common base; P1 tubular, shorter than the mesenteron; P2 situated below P1, conical, its distal margin bent against the food flow as described under the diagnostic characters; P2 coaxial with P3; enteric-valve seating trilobed, separated from the rest of P3 by a constriction; distal end of P3 very prominent in dorsal view, joining P4 on the left side; isthmus distinct.

Sources: Cuezzo C.; Nickle D. A. 2011. A new genus and species of termites (Isoptera, Termitidae, Nasutitermitinae) from the rainforest of northern Peru. ZooKeys 159: 1–9. https://doi.org/10.3897/zookeys.159.2311, Sinqasapatermes gen. n. — Diagnosis; Description: Imago / Soldier / Worker / Mandibles / Digestive tube（ZooKeys 159: 1–9） This text is an adaptation, not a verbatim transcription of the original.