Eburia (Eburia) girouxae Le Tirant and Santos-Silva, 2016

Tirant, Stéphane Le & Santos-Silva, Antonio, 2016, Two new Eburiini from Mexico (Coleoptera, Cerambycidae, Cerambycinae), Insecta Mundi 2016 (512), pp. 1-8 : 3-5

Eburia (Eburia) girouxae Le Tirant and Santos-Silva , new species

( Fig. 5–8 , 10, 12 )

Holotype male. Color. The following black: head, prothorax, ventral side of meso- and metathorax, wide longitudinal band on elytra, from base to near apex. The following dark-brown: parts of scape, pedicel, narrow ring on apex of antennomeres III–X; most of procoxae; inferior half of lateral sides, ventral side of distal third of femora; narrow band on dorsal and superior half of lateral sides of apex of femora; short area on ventral side of tibiae. The following reddish-brown (darker on some areas): parts of scape; most of antennomeres (gradually lighter toward distal antennomeres); most of elytra; trochanters; most of femora; lateral and dorsal sides of base of tibiae; most of meso- and metacoxae. Pubescence and setae yellowish.

Head. Frons finely, abundantly punctate, except for smooth central area close to clypeus; with deep depression laterally close to clypeus; glabrous on smooth central area and wide area surrounding antennal socket and projected toward clypeus, with dense pubescence on remaining surface (obscuring integument). Area between antennal tubercles and upper eye lobes finely, abundantly punctate on each side of coronal suture; with band of pubescence connected to that of frons and vertex, margined for subglabrous band followed by another pubescent band close to antennal tubercle. Vertex finely, abundantly punctate, except for smooth, narrow, triangular, central area; with dense pubescence, except for glabrous triangular area, two large, subrounded areas on each side, and subglabrous central area close to prothoracic margin. Central area between upper eye lobes with two small tubercles. Area behind upper eye lobes finely, densely punctate, densely pubescent. Area behind lower eye lobe with large, glabrous, smooth area on its basal third close to prothorax, projected toward center of pubescence behind upper eye lobe; remaining surface finely, abundantly punctate close to prothorax, smooth close to eye; with band with dense pubescence surrounding remaining area of lobe, connected to that involving upper eye lobe. Submentum coarsely, confluently punctate; with abundant, long, decumbent setae throughout. Gena finely, abundantly punctate; with short, sparse setae, except for dense band close to lower eye lobe and narrow band at apex. Coronal suture distinct from clypeus to near anterior margin of prothorax. Antennal tubercles obliquely, widely sulcate; finely, abundantly punctate; with band of pubescence inside of sulcus, connected to that close to eye, glabrous close to antennal socket, with sparse setae on remaining surface. Distance between upper eye lobes 0.50 times length of scape; distance between lower eye lobes in frontal view 0.95 times length of scape; distance between lower eye lobes in ventral view 2.3 times width of one lobe (also in ventral view). Antennae 1.7 times elytral length (right antenna missing antennomeres IX– XI); reaching elytral apex at distal quarter of antennomere IX; inner side of antennomeres III– VIII with long, moderately abundant setae (shorter, sparser toward VIII); antennal formula based on length of antennomere III: scape = 0.86; pedicel = 0.23; IV = 0.81; V = 0.98; VI = 1.01; VII = 1.01; VIII = 0.92; IX = 0.86; X = 0.80; XI = 0.95.

Thorax. Prothorax transverse, 1.3 times wider than long (including lateral tubercles); central lateral tubercle large, acute toward apex; with rounded, large tubercle laterally, between central tubercle and anterior margin. Pronotum with two distinct, conical tubercles close to middle on each side of distal half, and two less conspicuous, large, subrounded, close to middle on each side of basal half; moderately coarsely, densely punctate, except for smooth area behind subrounded tubercles and on conical tubercles, and anterior quarter, where punctures are distinctly finer and sparser; with narrow, transverse sulcus close to basal margin; with arched, moderately deep sulcus between basal tubercles and narrow transverse sulcus; surface densely pubescent, interspersed with long setae, except for glabrous apex of conical tubercles and area behind basal tubercles, and large area behind conical tubercles, where pubescence is less dense. Lateral sides of prothorax moderately coarsely, sparsely punctate; with dense pubescence interspersed with sparse long setae, except for area close to anterior margin with sparse short setae, interspersed with long setae. Prosternum transversely depressed centrally; with dense pubescence on about basal third, slightly sparser on central third, distinct sparse on anterior third (central region of this area with transverse band of pubescence). Prosternal process narrowed centrally; narrowest area 0.24 times width of procoxal cavity. Ventral side of meso- and metathorax densely pubescent, except for glabrous, transverse area near to metacoxal cavities. Scutellum pubescent. Elytra coarsely punctate on basal half of longitudinal black band (mainly centrally), gradually sparser, finer toward apex of this region; remaining surface microsculptured, finer punctate, mainly toward apex; surface pubescent, except for sparse pubescence inside of black longitudinal band (slightly denser centrally); each elytron with two elongate eburneous maculae at about middle, with outermost about 1.3 times longer than innermost and antennomere III; apex truncate, with small projection at outer angle, with spine at sutural angle. Legs. Inner apex of meso- and metafemora with triangular projection (sub-spiniform).

Abdomen. Ventrites densely pubescent; apex of ventrite V truncate, slightly widely emarginate centrally.

Dimensions (mm). Holotype male. Total length (including mandibles), 21.6; prothoracic length, 3.9; basal prothoracic width, 3.9; distal prothoracic width, 3.3; largest prothoracic width, 5.1; humeral width, 5.5; elytral length, 15.5.

Type material. Holotype male from MEXICO, Guerrero: Xalitla (590 m), 11.VIII.2010, Daniel Curoe col. ( MZSP).

Etymology. The species is named for Dr. Marjolaine Giroux, entomologist at the Montreal Insectarium.

Remarks. Eburia (Eburia) girouxae sp. nov. is similar to E. (E.) perezi Chemsak and Giesbert, 1986 , but differs as follows: antennae about 1.2 times as long as body ( Fig. 5–7 ); elytra without eburneous maculae on base ( Fig. 5 ); meso- and metafemora with distinct brush of long and dense setae ventrally ( Fig. 10 ), and without long spine at inner apex ( Fig. 12 );. In male of E. (E.) perezi ( Fig. 9 ) the antennae is about 1.5 times as long as body, usually there are two eburneous maculae on the base of each elytron (sometimes only one), the meso- and metafemora have no brush of long setae ventrally ( Fig. 11 ), and have a long spine at inner apex ( Fig. 13 ).

According to Botero (2014): “In the tribe Eburiini Blanchard, 1845 the presence of tubercle between the upper ocular lobes and the gula with a transverse sulcus is exclusive of the genera Susuacanga and Styliceps Lacordaire, 1869 . Susuacanga differs from Styliceps by the pronotal surface with thick, deep punctures, or finely rugose, by the anterior margin of pronotum with no more than one transverse sulcus, and by the mesosternal process without a tubercle. In Styliceps the pronotal surface is very rugose, the anterior margin of pronotum has two transverse sulci and the mesosternal process has a tubercle. Besides the characteristics shared with Styliceps , Susuacanga differs from Eburia by its deeply punctured pronotal surface which is never present in Eburia .” However, although small, Eburia (Eburia) girouxae sp. nov. has the two tubercles between the upper eye lobes. Notwithstanding, the new species cannot be included in these genera, because other features do not agree with those present in Susuacanga and Syliceps as, for example, the coarse punctation on pronotum.

In the key by Noguera (2002), the new species of Eburia herein described could be included in the alternative of couplet 19:

19(1). — Procoxal cavities laterally rounded or with only a small median furrow ................................ 20 Procoxal cavities angulate externally ....................................................................................... 19’

19’(19). Elytra with two short eburneous maculae at about midlength and without longitudinal area exposing integument ............................................................. E. (E.) fuliginea (Bates, 1872)

— Elytra with two elongate eburneous maculate at about midlength and with longitudinal area exposing integument ..................................................... Eburia (Eburia) girouxae sp. nov.

Figures

Figures 1–8. 1–4) Susuacanga boteroi sp. nov., holotype female: 1) Dorsal habitus; 2) Ventral habitus; 3) Lateral habitus; 4) Head, frontal view. 5–8) Eburia (Eburia) girouxae sp. nov., holotype male: 5) Dorsal habitus; 6) Ventral habitus; 7) Lateral habitus; 8) Head, frontal view.

Figures 9–13. 9) Eburia (Eburia) perezi, male, dorsal view. 10–11) Detail of ventral side of metafemora: 10) Eburia (E.) girouxae sp. nov., holotype male; 11) Eburia (E.) perezi, male. 12–13) Detail of apex of meso- and metafemora: 12) Eburia (E.) girouxae sp. nov., holotype male; 13) Eburia (E.) perezi, male.