Labiotermes

Constantino, Reginaldo, Acioli, Agno N. S., Schmidt, Karen, Cuezzo, Carolina, Carvalho, Sérgio H. C. & Vasconcellos, Alexandre, 2006, A taxonomic revision of the Neotropical termite genera Labiotermes Holmgren and Paracornitermes Emerson (Isoptera: Termitidae: Nasutitermitinae), Zootaxa 1340, pp. 1-44 : 6-7

Key to the soldiers of Labiotermes

1. Left mandible with two conspicuous marginal teeth ( Fig. 11 B) ................................. 2

­ Left mandible with vestigial teeth ( Fig. 11 A) ............................................................. 6

2. Front coxa with a distinct projection on outer margin near base ( Fig. 9 E) ................. 3

­ Front coxa without a distinct projection near base ( Fig. 3 F) ...................................... 5

3. Cutting margin of apical tooth on left mandible C­shaped ( Fig. 11 I) L. orthocephalus

­ Cutting margin of apical tooth on left mandible S­shaped ( Fig. 11 B) ........................ 4

4. Frontal tube distinctly conical, with a narrow tip oriented anteriorly; dimorphic ( Fig. 5 ) ........................................................................................................... L. laticephalus

­ Frontal tube short with a broad tip oriented upward; monomorphic ( Fig. 2 ) .................

..................................................................................................................... L. emersoni 5. Head with numerous hairs; front femur without short spines ( Fig. 8 ) ........................... ............................................................................................... L. oreadicus , new species

­ Head with very few hairs; front femur with an irregular row of short spines ( Fig. 3 ) ... ..................................................................................................... L. guasu , new species

6. Head densely covered with microscopic hairs ( Fig. 6 A) or with long, fine hairs ....... 7

­ Head with sparse bristles but without fine or microscopic hairs ( Figs. 1 A, 7A) ........ 8

7. Head densely covered with fine long hairs ................................................. L. pelliceus

­ Head densely covered with microscopic hairs ( Fig. 6 ) ............................. L. leptothrix

8. Right mandible with two distinct marginal teeth ( Fig. 11 D); sides of head convex and converging towards front; part of labrum with hyaline border elongate and with 2 distinct bristles near tip ..................................................................................... L. labralis

­ Right mandible with a single marginal tooth ( Figs. 11 A, 11G); sides of head nearly straight and parallel; part of labrum with hyaline border short and with 4 bristles along the line between sclerotized part and hyaline part ...................................................... 9

9. Labrum clearly longer than wide; head with only a few sparse bristles ( Fig. 7 ); front coxa with a small and rounded projection near base ............................... L. longilabius

­ Labrum about as wide as long; head with numerous bristles of variable size ( Fig. 1 ); front coxa with a conspicuous conical projection near base .................... L. brevilabius

Figures

FIGURES 1. Labiotermes brevilabius. Soldier: A, head in dorsal view; B, thorax; C, head in profile. Worker: D, head in dorsal view; E, thorax; F, head in profile; G, right front leg. Scale bars = 1.0 mm.

FIGURES 2. Labiotermes emersoni. Soldier from Minas Gerais: A, head in dorsal view; B, pronotum in dorsal view; C, head in profile; D, pronotum in posterior view; E, right front leg; F, postmentum. Soldier from Rondonia: G, head in profile. Imago: H, head in dorsal view; I, pronotum; J, head in profile; K, antenna. Worker: L, head in dorsal view; M, thorax; N, head in profile; O, right front leg. Scale bars = 1.0 mm.

FIGURES 3. Labiotermes guasu, new species. Soldier: A, head in dorsal view; B, pronotum in dorsal view; C, pronotum in posterior view; D, head in profile; E, postmentum; F, right front leg. Worker: G, head in dorsal view; H, thorax; I, head in profile; J, right front leg. Scale bars = 1.0 mm.

FIGURES 5. Labiotermes laticephalus. Large soldier: A, head in dorsal view; B, pronotum in dorsal view; C, pronotum in posterior view; D, postmentum; E, head in profile; F, right front leg. Small soldier: G, head in dorsal view; H, pronotum in dorsal view; I, pronotum in posterior view; J, head in profile; K, postmentum. Worker: L, right front leg; M, head in dorsal view; N, thorax; O,

FIGURES 6. Labiotermes leptothrix. Soldier: A, head in dorsal view; B, head in profile. Worker: C, head in dorsal view; D, thorax; E, head in profile; F, right front leg. Scale bars = 1.0 mm.

FIGURES 7. Labiotermes longilabius. Soldier: A, head in dorsal view; B, head in profile. Worker: C, head in dorsal view; D, thorax; E, head in profile; F, right front leg. Scale bars = 1.0 mm.

FIGURES 8. Labiotermes oreadicus, new species. Soldier: A, head in dorsal view; B, pronotum in dorsal view; C, pronotum in posterior view; D, head in profile; E, right front leg; F, postmentum. Worker: G, head in dorsal view; H, thorax; I, head in profile; J, right front leg. Scale bars = 1.0 mm.

FIGURES 9. Labiotermes orthocephalus. Soldier from Mato Grosso: A, head in dorsal view; B, pronotum in dorsal view; C, head in profile; D, pronotum in posterior view; E, right front leg; F, postmentum. Soldier from Minas Gerais: G, head in dorsal view; H, pronotum; I, head in profile. Imago: J, head in dorsal view; K, pronotum; L, head in profile; M, antenna. Worker: N, head in dorsal view; O, thorax; P, head in profile; Q, right front leg. Scale bars = 1.0 mm.

FIGURES 11. Soldier mandibles. A, Labiotermes brevilabius; B, L. emersoni; C, L. guasu, new species; D, L. labralis; E, L. laticephalus; F, L. leptothrix; G, L. longilabius; H, L. oreadicus, new species; I, L. orthocephalus; J, L. pelliceus. Scale bars = 0.5 mm.