Unachlorus rafaeli, Monné & Monné, 2018

Monné, Marcela L. & Monné, Miguel A., 2018, New species and distribution notes of Cerambycidae (Coleoptera) for the state of Acre and the Amazon basin, Brazil, Zootaxa 4442 (3), pp. 458-468 : 459

Unachlorus rafaeli sp. nov.

( Fig. 1 )

Description. Male. Integument black except elytra olive green. Abdomen sparsely covered with short grayish setae. Head finely and densely punctate; lower lobe of eyes two times height of a gena; upper eye lobes separated by 1.5 times width of lobe. Antennae long, filiform, without setae; antennomere VI extending beyond elytral apices. Antennomere III 1 /3 longer than IV; IV–X subequal in length; XI about 1/3 longer than X, appendiculate.

Thorax. Pronotum with acute lateral tubercle located slightly beyond middle. Surface with fine dense transverse rugae. Prosternal process about 1/3 width of procoxa; mesosternal process about equal to width of mesocoxa. Scutellum small and triangular.

Elytra finely and densely punctate on entire surface; humeri rounded; apex of elytra broadly rounded with fringe of short white setae. Hind legs about twice as long as prolegs (mesolegs broken). Legs sparsely covered with short grayish setae; metafemora long and linear, slightly expanded in apical third; apex of metafemora extending beyond elytral apices; first metatarsomere slightly shorter than following two metatarsomeres together. Abdomen with fifth ventrite truncated at apex.

Measurements (mm). Holotype male. Total length, 9.4; prothorax length, 2.0; prothorax width, 2.2; elytral length, 6.8; humeral width, 2.5.

Etymology. The species is named in tribute to Dr. José Albertin Rafael (INPA), for his friendship and valuable contributions to the Amazonian Cerambycidae .

Type material. Holotype male: Brazil, Acre: Bujari, Floresta Estadual do Antimary , 9°20’02’’S, 68°19’17’’ W, 25–27.VIII.2016, A.A. Agudelo, F.F. Xavier, D.M.M. Mendes & J.A. Rafael col. ( INPA).

Comments. The genus Unachlorus , with only one species described ( U. viridis Martins & Galileo, 2008 ), belongs to the group of genera in Trachyderini having the elytra with metallic green reflections: Arapari Martins, Galileo & Santos-Silva, 2015 ; Chlorotherion Zajciw, 1962 ; Eriphus Audinet-Serville, 1834 ; Neochrysoprasis Franz, 1969 ; Micropelta Zajciw, 1961 ; and Weyrauchia Tippmann, 1953 . Unachlorus differs from Arapari and Weyrauchia by the prothorax with a lateral projection, whereas in Arapari and Weyrauchia (except W. marcelae Martins & Galileo, 2008 ) the prothorax is rounded laterally; differs from Chlorotherion by the apex of metafemora unarmed, whereas in Chlorotherion the apices of the metafemora are bispinose, with the inner spine more developed; Unachlorus differs from Eriphus by the antennae exceeding the elytral apex, whereas in Eriphus the antennae are shorter than the elytra in both sexes, with antennomeres V–X short and subtriangular; Unachlorus differs from Micropelta by the metafemora reaching the apical third of the elytra, elytral apex sinuous and mesosternal process tuberculate, whereas in Unachlorus the apex of the metafemora exceeds the rounded extremity of the elytra and the mesosternal process is flat, without tubercles.

Unachlorus rafaeli sp. nov. ( Fig. 1 ) differs from U. viridis ( Fig. 2 ) mainly by the color and surface of the pronotum: in U. viridis the pronotum is green with cupreous reflections and the surface is striated-reticulated, with the striae interrupted at the middle and interspersed with punctures, whereas in U. rafaeli the prothorax is black and the surface of the pronotum has fine dense transverse rugae, without interruptions or punctures.

Figures

FIGURES 1–5. 1, Unachlorus rafaeli sp. nov.; 2, Unachlorus viridis Martins & Galileo, 2008; 3, Stizocera nigroapicalis Fuchs, 1961; 4, Delemodacrys mourei Martins & Napp, 1979; 5, Tropidozineus impensus Monné & Martins, 1976.