Eurysthea chicaque, Ávila-Jiménez & Botero & García & Santos-Silva, 2025

Ávila-Jiménez, Ángelo, Botero, Juan Pablo, García, Martha Jeaneth & Santos-Silva, Antonio, 2025, Checklist of the Cerambycidae (Insecta, Coleoptera) from a cloud forest in the Chicaque Natural Park (Cundinamarca, Colombia): with the description of five new species and new geographic records, European Journal of Taxonomy 1007, pp. 211-238 : 215-218

Eurysthea chicaque sp. nov.

urn:lsid:zoobank.org:act:360175E4-A103-406D-AAD0-35AECC4FFA46

Figs 2–9

Diagnosis

Eurysthea chicaque sp. nov. ( Figs 2–9 ) differs from its congeneric species by the colour of the elytral integument, mostly brownish with the presence of two dark-brown maculae on each elytron. The new species is similar to Eurysthea sordida (Erichson, 1847) , E. vandenberghei Santos-Silva, Heffern & Botero, 2022 , and E. llinasi Taboada-Verona & Botero, 2018 by the elytra without apical spines. The new species differs from E. sordida by the antennomeres III–V with apical spines and pronotum, and elytra with sparse setae (in E. sordida , antennomere V does not have a spine and the pronotal and elytral pubescence is dense). It differs from E. vandenberghei by having antennomeres III–V with apical spines and pronotum with strongly elevated tubercles (in E. vandenberghei , antennomeres III–VI are spined and the pronotal tubercles are slightly elevated). Eurysthea chicaque differs from E. llinasi especially by the elytra much shorter relative to the elytral width (distinctly longer in E. llinasi ), and with a single light area (two in E. llinasi ). Eurysthea chicaque is also similar to E. cribripennis Bates, 1885 , which is present in the Chicaque Natural Park, but differs from it by the elytral apex unarmed (with apical spine in E. cribripennis ).

Etymology

The name of the new species refers to the type locality. The etymology in the Muisca language means ‘our struggle’. It is recognition for being the first private Natural Reserve in Colombia.

Type material

Holotype COLOMBIA • ♂; Cundinamarca, Parque Natural Chicaque , “bosque de robles”; 4°37′03.3″ N, 74°18′41.7″ W; 2240 m a.s.l.; 13 Feb. 2022; A. Ávila leg.; in Quercus humboldtii ; direct collect; MHNUPN, MHNUPN _ ENT 2200199 .

Paratypes COLOMBIA • 2 ♂♂; same data as for holotype; ICN, ICN _ 113783 , ICN _ 113784 • 1 ♂; same data as for holotype; MHN-UPN, MHNUPN _ ENT 2200201 • 2 ♀♀; same data as for holotype; MHN-UPN, MHNUPN _ ENT 2200202 , MHNUPN _ ENT 2200203 .

Measurements (in mm)

Holotype male

Total length: 10.30, prothoracic length: 1.95, anterior prothoracic width: 1.35, posterior prothoracic width: 1.60, widest prothoracic width: 1.95, humeral width: 2.40, elytral length: 7.30.

Paratypes (♂ / ♀, n = 3/ 2) Total length: 10.75–12.10 / 10.15–11.90, prothorax length: 1.80–2.30/ 1.90–2.05, anterior prothoracic width: 1.50–1.80/ 1.35–1.75, posterior prothoracic width: 1.70–2.00 / 1.60–1.80, widest prothoracic width: 2.15–2.35/2.40–3.00, humeral width: 2.40–2.80 /2.30–2.80, elytral length: 8.10–8.80 / 7.30–8.70.

Description

Male holotype ( Figs 2–5 )

COLORATION. Integument brown. Head, ventral surface of meso- and metathorax dark brown; antennae and legs yellow; elytra brown on circum-scutellar area, dorsally with large, inverted dark-brown macula on anterior half, with transverse, wide yellowish-brown macula centrally, projected backward close to suture, and longitudinal dark-brown macula from about middle to posterior quarter of dorsal surface, this macula gradually narrowed and became lighter toward its apex; remaining elytral surface light brown, gradually lighter toward apex.

HEAD. Frons short, with golden decumbent setae. Vertex with deep punctures laterally. Antennal tubercles with sparse, elongate and decumbent golden setae; with abundant golden setae around the antennal cavity. Distance between upper eye lobes about half length of scape; in frontal view, distance between lower eye lobes equal to length of scape. Genae with rounded apex, sparsely punctate. Median groove distinct. Clypeus with apical margin truncate; postclypeus with evident punctation and sparse golden pubescence. Labrum emarginate, with evident, moderately long yellowish-brown setae on anterior half. Outer surface of mandibles with sparse yellowish-brown pubescence and a few long, erect yellowish setae interspersed. Antennomeres III–IV with distinct spine on inner apex; V with inner apical spicule. Scape, pedicel, and antennomeres III–XI with abundant yellowish-brown pubescence, longer on scape; scape, pedicel, and antennomere III with long, erect yellowish setae ventrally, setae distinctly longer on III, and sparse, long, erect yellowish-white setae dorsally; IV–VIII with long, erect yellowish setae ventrally, setae distinctly sparser toward VIII, and a few long, yellowish-white setae on dorsal apex. Antennal formula (ratio) based on length of antennomere III: scape = 0.56; pedicel = 0.15; IV = 1.00; V = 1.08; VI = 1.04; VII = 1.08; VIII = 0.95; IX = 0.86; X = 0.75; XI= 0.80.

THORAX. Prothorax longer than wide. Pronotum coarsely punctate toward margins and gradually finely punctate toward center; with five tubercles: four subcircular, two anteriorly and two posteriorly, and another centrally, elongate, glabrous, elevated; area between tubercles with abundant yellowish setae. Sides of prothorax with two weakly elevated tubercles: an anterior rounded-elongated and a median acute. Prosternum depressed, with white setae, more abundant laterally, and moderately punctate, coarser on posterior ⅔. Metanepisternum with abundant, moderately long yellowish setae. Metaventrite with long yellowish setae laterally, shorter and sparser whitish pubescence centrally, with some long setae interspersed and glabrous on metathoracic discrimen. Scutellum with dense golden setae.

ELYTRA. Coarsely punctate, with long, decumbent white setae and some interspersed long erect white setae, not obscuring integument on entire surface. Apex unarmed, rounded.

LEGS. Femora with abundant yellowish pubescence not obscuring integument, pubescence bristly and longer dorsally; with a few long, erect yellowish-white setae interspersed. Tibiae with long, erect both white and yellow setae, denser on apex of ventral surface.

ABDOMEN. Ventrites with sparse, decumbent white setae and long, erect white setae interspersed; apex of ventrite 5 subrounded, slightly emarginate centrally.

Remarks

Eurysthea chicaque sp. nov. can be included in the alternative of couplet ‘19’ from Botero & Santos-Silva (2017):

19. Elytra with a single light yellowish area about middle .................................................................. 19’

– Elytra with two light yellowish areas on posterior half .................................................................. 20

19’.Elytral apex spiniform, especially on outer angle. Bolivia (Beni, Santa Cruz), Argentina (Salta, Jujuy) ............................................................................................................. E. nicolai (Aurivillius, 1908)

– Elytral apex rounded. Colombia (Cundinamarca) .............................................. E. chicaque sp. nov.

Figures

Figs 2–9. Eurysthea chicaque sp. nov. 2–5. Holotype, ♂ (MHNUPN_ENT 2200199). 2. Dorsal view. 3. Ventral view. 4. Lateral view. 5. Detail of head, frontal view. 6–9. Paratype, ♂ (MHN-UPN). 6. Detail of head, frontal view. 7. Dorsal view. 8. Ventral view. 9. Lateral view. Scale bars: 2–5 = 2 mm; 6–8 = 1 mm; 9 = 2 mm.