Eburia (Eburia) angeldiazi, Pérez-Flores & Toledo-Hernández & Villagomez, 2018

Pérez-Flores, Oscar, Toledo-Hernández, Víctor H. & Villagomez, Fernando, 2018, A new species of Eburia Lacordaire, 1830 (Coleoptera: Cerambycidae) from Mexico, Zootaxa 4399 (2), pp. 289-294 : 290-294

Eburia (Eburia) angeldiazi sp. nov.

( Figs. 1A, 1B , 2A, 2B, 2C , 3A, 3B )

Diagnosis: This species differs from the other species of Eburia (Eburia) in having three tubercles at pronotal disk, without lateral gibbosities. The corono-frontal suture is moderate, not wide. Further, the anterior eburneous maculae on elytra starts from base, with innermost longer than outermost.

Description: Total length: 22.3 mm. Color: Black: antennal tubercles; genae; two subrounded areas at each side, close to prothoracic margin; base and apex of pronotum; lateral and medial tubercles of pronotum; prosternum and mesosternum; wide longitudinal band on elytra, from base to near apex; apex of elytra; procoxae; posterior half of femora; apex of tibiae and tarsal segments; dark-brown: base and apex of scape, pedicel, apical ring on antennomeres III–X; metasternum; ventrites; metacoxae and trochanters; reddish-brown: most of head; parts of scape, most of antennomeres; most of elytra; anterior half of femora, mesocoxae. Most of integument covered with pubescence whitish and yellowish. Head. Frons strongly transverse ( Fig. 2A ), 1.7 times wider than long, abundantly punctuate, with dense short pubescence. Vertex finely punctate, without glabrous triangular area. Genae short, broad, with short sparse pubescence and obtuse apex. Corono-frontal suture moderately defined, ending about tentorial depression. Antennal tubercles obliquely, acute, widely sulcate. Distance between upper eye lobes 1.8 times length of upper lobe; distance between lower eye lobes in frontal view 0.8 times length of scape; distance between lower eye lobes in ventral view 2.3 times width of one lobe (also in ventral view); lower eye lobe 1.5 times longer than upper eye lobe. Gula finely, abundantly punctuate, with short sparse setae, without transverse sulcus. Antennae 2.6 times elytral length; reaching elytral apex at anterior third of antennomere VII; inner side of antennomeres III–VIII with long, moderately abundant setae (less abundant toward posterior antennomeres); scape 0.6 times length of antennomere III; antennomeres IV, IX–X subequal to III; V and VIII subequal, 1.1 times length of antennomere III; VI–VII subequal, 1.2 times length of antennomere III. Thorax. Prothorax transverse ( Fig. 2B ), 1.4 times wider than long (including lateral tubercles). Pronotum densely punctuate, except for apex of discal and lateral tubercles; with dense pubescence, except for glabrous apex of discal and lateral tubercles, with few long setae; with two lateral tubercles, one central very acute toward apex, and one rounded, between central tubercle and anterior margin. Pronotal disk with two conical tubercles, close to middle at each side of distal half, and a callosity, conspicuous, large, subrounded, close to middle of basal half. Prosternum transversely depressed centrally; with abundant pubescence on about posterior half and sparse on anterior half; prosternal process narrowed, posteriorly arcuate, apex rounded, not expanded. Ventral side of meso- and metasternum densely pubescent, except for glabrous, transverse area near to metacoxal cavities. Scutellum with abundant pubescence. Elytra subparallel ( Fig. 2C ), 3 times long than wider, coarsely punctate on basal half, gradually sparser toward apex; dense pubescent, except for sparse pubescence inside of black longitudinal band and sparse setae; each elytron with four eburneous maculae, two small at base, starting at base, with innermost 1.3 times longer than outermost; and two long at about middle, with outermost 1.5 times longer than innermost and antennomere III; apex truncate, with apicolateral projection and sutural spine. Legs. Femora gradually enlarged ( Fig. 3A ); metafemora longer than pro- and mesofemora; apex of meso- and metafemora bispinose, spiniform projection shorter than width of femora; tibiae approximately straight. Abdomen. Abdominal sternites with abundant pubescence; apex of sternite V truncate, slightly emarginate centrally. Male genitalia is shown in Fig. 3B .

Female. Form similar, but more robust. Antennae shorter than in male, reaching elytral apex at half of antennomere IX. Length, 19.8–23.6 mm.

Variation. The length in males is 16.8–22.3 mm.

Etymology. The species is named for Angel H. Díaz, for providing specimens for this study. The epithet is a noun in the genitive case.

Type material. Holotype (male): Mexico, Michoacán, Municipio de Villamar, San Antonio Guaracha , 19°56´43.72´´ N, 102°33´10.04´´ O, 1 612 msnm. 7/VII/2016 A. Díaz col. ( CNIN) ; Paratypes (7): Mexico, Michoacán, Municipio de Villamar: Emiliano Zapata, 19°59´24.35´´ N, 102°36´12.02´´ O, 1 681 msnm. 17/V/ 2015, A. Díaz col. ( CNIN, male); Jaripo , 19°55´46.78´´ N, 102°35´51.04´´ O, 1 614 msnm. : 8/VII/2016 A. Díaz col. (CNIN, female); 9–15/VII/2017 A. Díaz col. (CNIN, male and female; CIUM, male); 17/VIII/2 0 17 A. Díaz col. (CNIN, female); San Miguel, 19°57´29.77´´ N, 102°35´49.63´´ O, 1 597 msnm. 26/VII/2015 A. Díaz col. ( CIUM, female).

Remarks: This species is similar to Eburia (Eburia) macrotaenia Bates, 1880 ( Fig. 1A and 1B ), but E. (E.) angeldiazi sp. nov. differs as follows: frons with corono-frontal suture moderately defined ( Fig. 2A ); antennal tubercles with apex obliquely, acute, widely sulcate ( Fig 2A ); pronotum with central lateral tubercles very acute toward apex ( Fig. 2B ); with pronotal disk with three tubercles without gibba ( Fig. 2B ); the outermost anterior eburneous maculae starts from base of elytra, and outermost posterior eburneous maculae 1.5 times longer than innermost ( Fig. 2C ); metafemora with short spiniform projection, shorter than width of femora ( Fig. 3A ). In E. (E.) macrotaenia frons with corono-frontal suture very distinct, wide ( Fig. 2D ); antennal tubercles with apex truncate ( Fig 2D ); pronotum with central lateral tubercles moderately, apically obtuse ( Fig. 2E ); with pronotal disk with three tubercles and two gibba ( Fig. 2E ); the outermost anterior eburneous maculae not starts from base of elytra, and outermost posterior eburneous maculae two times longer than innermost ( Fig. 2F ); metafemora with long spiniform projection, longer than width of femora ( Fig. 3C ); and the male genitalia differs from the E. (E.) angeldiazi sp. nov. ( Fig. 3D ).

This species is currently known only from the state of Michoacán, Mexico and E. (E.) macrotaenia has registered from Mexico only in Chiapas, Guatemala and El Salvador.

In the key by Noguera (2002), Eburia (E) angeldiazi could be included in to couplet 16:

16(14) Elytra with the outermost posterior eburneous maculae shorter than antennomeres 1–3 together; calli at pronotal disk, if present, with pubescence.................................................................................. 17 - Elytra with the outermost posterior eburneous maculae longer than antennomeres 1–3 together; pronotal disk with three prominent calli, glabrous.................................................................................. 17´17´(16)Elytra with the outermost posterior eburneous maculae curved at apex; pronotal disk with two lateral gibba at base.................................................................................... E. (E.) macrotaenia Bates, 1880 - Elytra with the outermost posterior eburneous maculae straight; pronotal disk without gibba................................................................................................... Eburia (Eburia) angeldiazi sp. nov.

Figures

FIGURE 1. A–B) Eburia (E.) angeldiazi sp. nov. holotype male: A) Dorsal habitus; B) Ventral habitus. C–D) Eburia (E.) macrotaenia male: C) Dorsal habitus; D) Ventral habitus.

FIGURE 2. A–C) Eburia (E.) angeldiazi sp. nov. holotype male: A) Head in frontal view; B) Pronotum; C) Elytra. D–F) Eburia (E.) macrotaenia male:D) Head in frontal view; E) Pronotum; F) Elytra.

FIGURE 3. A–B) Eburia (E.) angeldiazi sp. nov. holotype male: A) Meso and metafemora; B) Male genitalia. C–D) Eburia (E.) macrotaenia male:C) Meso and metafemora; D) Male genitalia.