Heterachthes antonkozlovi, Santos-Silva, Antonio & Botero, Juan Pablo, 2017

Santos-Silva, Antonio & Botero, Juan Pablo, 2017, A new species of Heterachthes Newman, 1840 from Colombia (Coleoptera, Cerambycidae), Zootaxa 4231 (4), pp. 581-584 : 581-583

Heterachthes antonkozlovi sp. nov. ( Figs. 1– 4 )

Description. Male. Head blackish except reddish-brown parts of antennal tubercles; mentum reddish-brown; mouthparts yellowish-brown; antennae dark reddish-brown, gradually lighter toward distal segments. Pronotum mostly dark brown, slightly lighter toward close to anterior and posterior margins, with some light reddish-brown areas: one largest, subelliptical, placed centrally, involving central tubercle; apex of anterolateral tubercles; part of posterolateral gibbosities; sides of posterior plate. Sides of prothorax dark brown except reddish-brown posterior region and large, oblique, light reddish-brown band from procoxal cavity to distal third. Prosternum centrally reddish-brown (enlarged toward anterior margin), laterally dark brown. Ventral side of mesothorax dark brown posteriorly, reddish-brown toward metathorax. Metasternum brown anteriorly, gradually reddish-brown toward apex. Elytra blackish except posterior fifth pale yellow and three yellowish-brown areas on anterior 2/3: one subtriangular, involving humerus, placed at anterior sixth, ending distinctly far from suture, reaching lateral margin; one sub-triangular, placed before middle, ending distinctly far from suture, reaching lateral margin; and one wide, oblique band, starting at lateral margin after middle, ending at suture about middle. Femoral peduncle reddish-brown, basal 2/3 of club mostly dark brown and distal third yellowish-brown. Tibiae brown on base, gradually yellowish-brown toward apex. Tarsi yellowish-brown. Abdominal ventrites I–III reddish-brown with areas more brown; abdominal ventrites IV–V light reddish-brown.

Head. Frons finely punctate-scabrous laterally, sub-smooth centrally and narrow region close to clypeus; with short, decumbent, moderately sparse, yellowish setae. Area between antennal tubercles finely, confluently punctate; with minute, sparse, yellowish setae. Area between antennal tubercles and upper eye lobes finely, abundantly, partially confluent punctate (punctures coarser than on frons); with minute, sparse, yellowish-setae and some long, erect, brown setae near to eyes. Area of vertex between eyes and prothoracic margin finely, abundantly punctate (slight sparser centrally); with minute, sparse, yellowish setae. Area behind upper eye lobes finely, abundantly punctate close to vertex, gradually sparser on area close to eye toward lower eye lobe; with some long, erect, yellowish-setae near eye. Area behind lower eye lobe tumid close to eye, finely, sparsely punctate; with long, erect, yellowish setae on tumid region. Genae minutely, densely punctate close to eye, smooth close to apex; with minute yellowish-setae interspersed with short, erect, yellowish setae on punctate region, glabrous close to apex. Postclypeus opaque, sub-smooth centrally, shiny, smooth laterally; with one long, erect seta on each side of opaque area. Anterior margin of labrum widely emarginate. Distance between upper eye lobes 0.4 times length of scape; distance between lower eye lobes in frontal view 0.6 times length of scape. Antennae 2.15 times elytral length, reaching elytral apex at apex of antennomere VIII. Scape dorsally, moderately coarsely, abundantly, confluently punctate, sparser toward apex; with minute, yellowish setae interspersed with short and long, yellowish setae. Antennomere III slightly, gradually enlarged toward apex, slightly swollen; with long, erect, yellowish setae ventrally. Antennomeres IV–XI filiform (IV slightly swollen); with long, erect, yellowish setae, mainly ventrally, shorter, sparser toward XI (except some long setae at apex of V–X). Antennal formula (ratio) based on antennomere III: scape = 0.59; pedicel = 0.17; IV = 0.75; V = 0.85; VI = 0.93; VII = 0.95; VIII = 0.86; IX = 0.81; X = 0.77; XI = 0.96.

Thorax. Prothorax cylindrical, slightly enlarged centrally, between anterior and posterior constrictions. Pronotum with three tubercles, one small, subconical, at each side of posterior half (near middle of pronotum) and one large, elongate, placed centrally; with large, subcircular gibbosity at each side of posterior half; with fine, sparse punctures from which emerges long, erect setae, mainly on anterior half; posterior half pubescent laterally and posteriorly; remaining surface with minute, sparse setae. Sides of prothorax pubescent on posterior 2/3, mainly on oblique light band, interspersed with some long, erect setae; remaining surface with minute, sparse setae. Prosternum minutely, sparsely punctate on dark sides of posterior half, very finely, transversely punctate about middle, smooth on remaining surface; with minute, moderately abundant setae on dark sides of posterior half, interspersed with some long, erect setae; remaining surface almost glabrous. Prosternal process notably narrowed centrally, triangularly expanded toward apex. Mesosternum with minute, moderately abundantly setae (more abundant basally and laterally) interspersed with long, erect setae. Mesepimeron, mesepisternum and metepisternum pubescent. Metasternum minutely, densely punctate laterally, interspersed with fine, sparse punctures; central area finely, sparsely punctate; pubescent laterally, interspersed with long, erect setae, with short, decumbent, sparse setae centrally. Scutellum pubescent (pubescence more distinct, more yellow toward apex). Elytra. Coarsely, moderately sparsely punctate (punctures finer, sparser toward apex); with long, erect, yellowish setae emerging from nearly all punctures; outer apex with long spine; sutural angle with short, triangular projection. Legs. Femora clavate; with long, erect, sparse yellowish setae. Tibiae with long, erect, sparse yellowish setae throughout; with short, sub-erect, abundant, yellowish setae on ventral side of distal third. Metatarsomere I as long as II–III together.

Abdomen. Ventrites pubescent (not obscuring integument) interspersed with long, erect, yellowish setae. Apex of ventrite V truncate.

Dimensions (mm). Total length (including mandibles), 12.15; prothoracic length, 2.45; anterior prothoracic width, 1.40; posterior prothoracic width, 1.55; widest prothoracic width, 1.60; humeral width, 2.10; elytral length, 8.20.

Type material. Holotype male from COLOMBIA, Antioquia: Municipio de Yarumal (Vereda Ventanita; 2020 m; 79°04’15”N / 75°26’59”W), 9–14.IV.2015, Sinyaev, M. Márquez & J. Machado col. ( MZSP).

Etymology. The new species is named after Anton Olegovich Kozlov (Moscow, Russia), who sent and donated the holotype.

Remarks. Heterachthes antonkozlovi sp. nov. is similar to H. signaticollis (Thomson, 1865) , but differs by the features presented in the key below, and by the elytral setae distinctly sparser. The general appearance of H. antonkozlovi resembles that of Pygmodeon andreae (Germar, 1824) (See Bezark 2016) , but differs by the procoxal cavities closed behind (opened in P. andreae ), and by the antennomeres III and IV in male distinctly tumid (not so in males of P. andreae ).

Heterachthes antonkozlovi sp. nov. can be included in the alternative of couplet “15” from Martins (2009) (translated; modified) [For comparisons, see photographs of the type of H. signaticollis at Bezark 2016]:

15(14). Elytra with abundant setigerous punctures, not organized in rows.................................................................................... 15’ - Elytra with setigerous punctures organized in 3 to 5 rows................................................................................................... 16 15’(15). Pronotum without pubescence; elytral apex with short spine at outer angle. Colombia, Venezuela.......................................

........................................................................................................................................... H. signaticollis (Thomson, 1865) - Pronotum distinctly pubescent on basal half; elytral apex with long spine at outer angle. Colombia.....................................

......................................................................................................................................................... H. antonkozlovi sp. nov.

However, it can be also included in the alternative of couplet “24” from Martins (2009) by the elytral setae partially sub-aligned in rows (translated; modified) [For comparisons, see photographs of H. signaticollis and H. similis at Bezark 2016]:

24(23). Outer elytral apex with long spine; first elytral macula of posterior half narrow, distinctly oblique. Colombia (Antioquia) ......

.............................................................................................................................................................. H. antonkozlovi sp. nov. - Outer elytral apex with short spine; first elytral macula of posterior half distinctly wider.................................................... 24’ 24’(24). Elytra with abundant, relatively short setae, slightly organized in rows. Colombia, Venezuela...................................................

.................................................................................................................................................. H. signaticollis (Thomson, 1865) - Elytra with longer and sparser setae, organized in four rows about middle of the elytra. Bolivia........ H. similis Martins, 1965

Figures

FIGURES 1 – 4. Heterachthes antonkozlovi sp. nov., holotype male: 1, dorsal habitus; 2, ventral habitus; 3, lateral habitus; 4, head, frontal view.