Rhynchotermes amazonensis , Constantini, Joice P. & Cancello, Eliana M., 2016

Constantini, Joice P. & Cancello, Eliana M., 2016, A taxonomic revision of the Neotropical termite genus Rhynchotermes (Isoptera, Termitidae, Syntermitinae), Zootaxa 4109 (5), pp. 501-522: 505-506

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Rhynchotermes amazonensis

sp. nov.

Rhynchotermes amazonensis  , sp. nov.

Holotype. minor soldier. 06.i. 2012, R.G. Santos & J.P. Constantini col., part of sample MZUSP 16106.

Type-repository: MZUSP.

Type -locality. BRAZIL. Rondônia: Porto Velho, Mutum-Paraná, lat 9.4513 S, long 64.8439 W.

Paratypes. BRAZIL. Amazonas: Manaus, Reserva Ducke, 01.i. 1991, F. B. Apolinário leg., UnB 3692 (11 major  plus 4 minor soldiers and 14 workers); São Gabriel da Cachoeira, 15.x. 2007, D. R. M. Mendonça leg., UnB 7594 (28 major  soldiers, 32 workers); Rondônia: Porto Velho, Abunã, lat 9.6341 S, long 65.4513 W, 12.i. 2011, M. M. Rocha & L. Prado col., MZUSP 14781 (14 major  soldiers, 5 workers); lat 9.5980 S, long 65.3666 W, 29.iii –05.iv. 2012, R. R. Silva & E. Z. Albuquerque col., MZUSP 16109 (5 minor soldiers); Mutum-Paraná, lat 9.5967 S, long 65.3463 W, 26.ii – 13.iii. 2010, T. F. Carrijo & R. G. Santos, col., MZUSP 12800 (4 major  soldiers, 13 minor soldiers, 17 workers), MZUSP 12801 (33 major  soldiers, 3 workers), 13203 (11 major  soldiers, 3 workers), 13204 (9 major  soldiers, 20 workers), 13206; 10.ix. 2010, M. M. Rocha & V. Mercado col., MZUSP 14777 (3 major  soldiers); lat 9.4352 S, long 64.8027 W, 07.i. 2011, M. M. Rocha & L. Prado col., MZUSP 14782 (1 major  and 1 minor soldier, 2 workers), MZUSP 14784 (20 major  soldiers, 4 workers); lat 9.4423 S, long 64.8592 W, 28.iii. 2011, V. Mercado & R. Probst col., MZUSP 14779 (3 major  soldiers, 2 workers); lat 9.4353 S, long 64.7918 W, 30.iii. 2011, MZUSP 14778 (13 major  soldiers); lat 9.4456 S, long 64.8037 W, 18.vi. 2011, S. Rosa & G.

Mazão col., MZUSP 14785 (1 major  soldier, 1 worker); lat 9.4513 S, long 64.8439 W, 06.i. 2012, R. G. Santos & J. P. Constantini col., MZUSP 16105 (11 major  soldiers, 36 workers), 16107 (1 major  soldier); sample complementary to holotype (14 major  soldier, 3 workers); lat 9.4513 S, long 64.8439 W, 09.ix. 2012, MZUSP 16108 (24 major  soldiers, 11 workers); 27.vi. 2010, T. F. Carrijo & S. Rosa col., MZUSP 14780 (15 major  soldiers, 5 workers), 14783 (5 major  soldiers, 3 workers); Jaci-Paraná, lat 9.4491 S, long 64.3577 W, 12.i. 2011, R. Santos & C. Mandai col., MZUSP 14776 (6 major  soldiers, 7 workers).

Imago. Unknown.

Soldier ( Fig. 3View FIGURE 3 A, B, 4 A, B, 5 A, B). Dimorphic. Major  soldier: head capsule pear-shaped in dorsal view, with a slightly constriction behind antennae ( Fig. 3View FIGURE 3 A, 4 A). Antenna with long articles ( Fig. 4View FIGURE 4 A). Labrum subpentagonal with distal margin hyaline. Frontal tube about one-third longer than head, conical. In profile, dorsal margin of head plus margin of frontal tube concave ( Fig. 4View FIGURE 4 A). Mandible strongly curved ( Fig. 5View FIGURE 5 A) with inner margin serrated, apical region of each mandible aligns to the proximal region of the opposite mandible when closed. Marginal tooth subrectangular. Pronotum with anterior lobe as long as it is wide. Postmentum subrectangular. Forecoxa process subcylindrical. Head capsule with six long bristles; two dorsally and four laterally. Six long bristles on labrum. Pronotum with three long bristles on anterior lobe margin. Head capsule orange to reddish, body yellow. Minor Soldier: head capsule rounded ( Fig. 3View FIGURE 3 B, 4 B). Mandibles evenly curved ( Fig. 5View FIGURE 5 B) with thin tip. Pronotum with anterior lobe longer than wide. Head capsule with four long bristles dorsally. Pronotum without bristles. Measurements given in Table 3.

Worker. Fontanelle conspicuous, rounded, whitish. Postclypeus with dark and incomplete medium line. Measurements given in Table 2.

Etymology. It is a geographic name formed as an adjective and derived from Amazon.

Biological notes. Rhynchotermes amazonensis  , sp. nov. was found in Porto Velho, Rondônia in the following places: around the roots of Musaceae  and Arecaceae  , abandoned nests, clumps of roots in the soil, close to a stream (Igarapé) about 30 centimeters below ground level with no sign of structured nest (the soil in the area was very humid and the soldiers and workers were diffusely distributed), in sticks on the ground and in litter.

Comparisons. The minor soldier of R. amazonensis  , sp. nov. resembles that of R. diphyes  but the mandibles of the former are thinner. The frontal tube of R. amazonensis  sp. nov. is straight whilst that of the minor soldier of R. diphyes  is slightly downward curved. The soldier of R. amazonensis  sp. nov. has four bristles on the head capsule but the minor soldier of R. diphyes  has six to ten bristles. The major  soldier of R. amazonensis  sp. nov. most closely resembles R. nasutissimus  but the new species has a domed head capsule and antennae with longer articles.


Museu de Zoologia da Universidade de Sao Paulo