Eranina amacayacu Botero and Noriega, 2017

Botero, Juan Pablo & Noriega, Jorge Ari, 2017, A New Species of Eranina Monné, 2005 (Coleoptera: Cerambycidae: Lamiinae) from Colombia, The Coleopterists Bulletin 71 (4), pp. 765-768 : 765-767

Eranina amacayacu Botero and Noriega , new species

( Figs. 1–5 )

Description. Holotype male. Head yellowish, stripe behind the eyes, area around antennal tubercles, and antennal tubercles black. Scape, pedicellum, antennomere III, basal half of antennomere IV, apex of the antennomere VI, and antennomeres VII–XI black; apical half of antennomere IV, antennomere V, and anterior third of antennomere VI light brown. Pronotum black with triangular, orange stripe from anterior margin to near posterior margin. Prosternum reddish. Elytra orange, basal third with semicircular black spot, apical third and scutellum black. Profemora orange with black apex, mesofemora with basal half orange and posterior half black, metafemora black with orange base. Pro- and mesotibiae black with orange base, metatibiae and tarsus black. Abdomen black. Body covered by long, erect, and sparse setae, longer and denser on inner face of scape, pedicellum, and antennomeres III and IV. Distance between upper eyes lobes 1.5 times width of upper eye lobes; distance between lower eye lobes, in anterior view, 1.5 times width of lower eye lobe. Antenna exceeding elytral apices at antennomere X. Antennal formula based on ratio with length of antennomere III: scape = 0.82; pedicel = 0.10; IV = 0.57; V = 0.30; VI = 0.25; VII = 0.25; VIII = 0.20; IX = 0.18; X = 0.15; XI = 0.15. Prothorax as long as wide, convex dorsally, lateral sides rounded. Prosternal process narrowed, width at narrowest point about 1/5 procoxal cavity width. Procoxal cavity strongly angulated laterally. Elytra about 4 times as long as prothorax, surface with longitudinal rows of punctures, obliterated by dense pubescence. Elytral apices rounded. Metatibiae expanded apically and with deep carina on ventral face.

Measurements. Holotype male. Total length = 6.5 mm; prothoracic length = 1.1 mm; prothoracic width at widest point = 1.1 mm; elytral length = 4.4 mm; humeral width = 1.5 mm.

Type Material. Holotype: “ COLOMBIA, Amazonas Department, NNPAmacayacu (03°43 ʹ 00 ʹʹ S- 70°16 ʹ 20 ʹʹ W, 115 m), March 2009, Secondary Tropical Rain Forest , white light trap, male, S. Otavo leg” (E-ANDES).

Etymology. Name in apposition. Refers to the name of the NNP Amacayacu in Colombia, where the holotype was collected.

Remarks. Eranina amacayacu is similar to Eranina porongaba (Galileo and Martins, 1998) and Eranina piterpe (Galileo and Martins, 2007) in having a similar pattern of coloration: antennae with light-colored antennomeres; pronotum and elytra bicolored, elytra yellowish anteriorly and black in posterior half. Eranina amacayacu differs from both species by having the apical half of antennomere IV, antennomere V, and anterior third of antennomere VI light brown (in E. porongaba , only antennomere IV is light brown; in E. piterpe , antennomere IV is entirely light brown); by the distance between the lower eye lobes, in anterior view, equal to 1.5 times width of a lower eye lobe ( Fig. 5 ) (in E. porongaba ( Fig. 6 ) and E. piterpe ( Fig. 7 ), the distance is greater than twice the width of a lower eye lobe) and by the male metatibiae expanded apically and with a deep sulcus on the ventral face ( Fig. 4 ) (sulcus characteristically absent in E. porongaba and in E. piterpe ). Furthermore, E. amacayacu is possibly endemic to the Amazonian region, whereas E. piterpe is recorded from Bolivia (Santa Cruz) and E. porongaba is recorded from the Atlantic Rainforest in southeastern Brazil (Santa Catarina).

In addition to E. amacayacu , six other species of Eranina are recorded from the Amazonian forest: E. cendira (Martins and Galileo, 1993) ; E. cincticornis ; E. curuca (Galileo and Martins, 1999) ; E. nigrita (Galileo and Martins, 1991) ; E. pallidula (Martins and Galileo, 1989) ; and E. rondonia Galileo and Martins, 2008 . The new species can be differentiated from all of them, except E. curuca , by the bicolored elytra (unicolored in the other species, in E. cendira the humeral region can be reddish and in E. rondonia the suture can be light brown). It differs from E. curuca by the presence of bicolored antennae, with some antennomeres black and others light brown (entirely dark brown in E. pallidula ), and by the bicolored pronotum (unicolored in E. pallidula ).

In the most recent key to the South American species of Eranina (Martins and Galileo 2014) , E. amacayacu can be inserted into couplet 17 as follows:

17(16). Apical half of antennomere IV, anten-

nomere V, and anterior third of anten-

nomere VI light brown; distance between

lower eye lobes, in anterior view, 1.5

times width of a lower eye lobe ( Fig. 5 );

males with metatibiae expanded apically

and with a deep carina on ventral face.

Colombia........ Eranina amacayacu

Botero and Noriega, new species - Antennomeres IV–VI with another pattern

of coloration; distance between lower eye

lobes, in anterior view, more than twice

width of lower eye lobe; males without

modified metatibiae ........................ 18 18(17). Antennomeres IV–VI light brown; anterior

half of elytra with black sutural stripe and

yellowish externally. Bolivia................

............. Eranina piterpe (Galileo and

Martins, 2007) - Only antennomere IV light brown; anterior

half of elytra yellowish with small black

patch around the scutellum. Bolivia and

Brazil (Santa Catarina) ........................

.............. Eranina porongaba (Galileo

and Martins, 1998)

Figures

Figs. 1–7. Eranina amacayacu, holotype, male: 1) Dorsal view; 2) Ventral view; 3) Lateral view; 4) Metatibia, ventral view; 5) Head, anterior view. 6) Eranina porongaba, holotype, head, anterior view. 7) Eranina piterpe, head, anterior view.