Cotyclytus arriagadai, Galileo & Martins & Santos-Silva, 2014

Galileo, Maria Helena M., Martins, Ubirajara R. & Santos-Silva, Antonio, 2014, Two new species and one new genus of South American Cerambycidae (Coleoptera), with redescriptions and distributional records for other taxa, Insecta Mundi 2014 (360), pp. 1-14: 4-5

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Cotyclytus arriagadai

sp. nov.

Cotyclytus arriagadai   sp. nov.

( Figures 6–7 View Figures 6–12 )

Holotype female. Integument black; anteclypeus and margins of labrum brownish-yellow; antennomeres VI-XI brownish, especially ventrally and entirely on antennomeres X-XI.

Head dorsally covered with dense, abundant white-yellowish pubescence, except on wide transverse basal band, irregular central area between clypeus and base of inferior ocular lobes, antennal tubercles, longitudinal band between antennal tubercles and superior ocular lobes. Clypeus basally with moderately dense white-yellowish pubescence; distally almost glabrous, except by two moderately long, brownish setae. Labrum with long, sparse, brownish setae. Genae as long as 1.5 times length of inferior ocular lobe in frontal view; with dense white-yellowish pubescence on basal half, gradually sparser toward apex; moderately dense, coarsely punctate. Antennal tubercles glabrous toward apex. Submentum with dense white-yellowish pubescence, mixed by long, sparse, brownish setae; remaining surface of ventral side almost glabrous. Distance between superior ocular lobes equal to length of scape; distance between inferior ocular lobes equal to 0.9 times length of scape. Mandibles dorsally glabrous, smooth; laterally, on basal half, coarsely, abundantly punctate, with moderately abundant, long and short yellowish setae. Antennae slightly surpass basal fourth of elytra; scape as long as 1.1 times length of antennomere III; III 1.5 times longer than IV; IV 1.1 times longer than V and VI; VI 1.2 times longer than VII; VII 1.3 times longer than VIII-XI.

Pronotum centrally and longitudinally carinate-granulate; with 3 transverse bands: the first one at base, centrally narrow, distinctly enlarged laterally; the second slightly behind middle, moderately straight centrally, laterally curved forward, with distinct projection toward base at base of the curvature, and another projection forward about middle of curvature; the third close to the anterior edge, distinctly enlarged laterally. Pronotal bands fused on lateral of prothorax, forming large area of pubescence that reaches about middle of procoxae; area between middle of procoxae with sparser pubescence, mixed by long, moderately abundant, yellowish setae. Mesosternum, mesepisterna, mesepimera, metasternum, and metepisterna with white-yellowish pubescence, denser on outer side of mesepisterna and metepisterna. Scutellum covered with dense white-yellowish pubescence. Each elytron with distinct band of white-yellowish pubescence, starting laterally close to humerus, following dorsally close to anterior edge, encompassing lateral of scutellum, down along the suture up to base of distal third, then oblique toward lateral up to about distal fifth, not reaching the epipleura, and then rising obliquely to find the band at side of scutellum; apex obliquely truncate, with small projection at outer and sutural angles, and narrow band of white-yellowish pubescence.

Ventrites I-III covered with dense, white-yellowish pubescence, centrally mixed by long setae of same color; ventrites IV-V with pubescence inconspicuous, and long, sparse setae. Femora and tibiae moderately pubescent, with glabrous or almost so areas. Metafemora surpass elytral apex; apex with short triangular projection at both sides. Metatarsomere I as long as 1.4 times II-V together.

Dimensions in mm. Total length (including mandibles), 13.0; prothoracic length, 3.1; largest prothoracic width, 3.1; humeral width, 3.0; elytral length, 8.3.

Type material. Holotype female, BOLIVIA, La Paz : Guanay (“Aserradero Uyapi”, 700 m), 1-15.XI.1993, G. Carrasco col. ( MZSP).  

Diagnosis. Cotyclytus arriagadai   resembles C. discretus (Melzer, 1934)   , but differs: antennae slightly surpassing the basal fourth of elytra; pronotal disk with transverse band of pubescence; elytral bands of pubescence slender; elytral bands of pubescence along of the suture diverging about distal third. In C. discretus   the antennae distinctly reach basal elytral third, the pronotal disk lacks a transverse band of pubescence, the elytral bands of pubescence are wider, and the elytral bands along the suture are not divergent.

Cotyclytus arriagadai   can be included in the alternative of couplet “3”, from Martins and Galileo (2011) (translated):


– 3a(3)

In addition to sutural band of pubescence, the elytra have oblique bands of pubescence from scutellum to the margin reaching the middle. ....................................................................... 3a

Elytra with only sutural band of pubescence, without other oblique band. .............................. 4

Pronotal disk with transverse band of pubescence; elytral bands of pubescence along suture diverging from suture at about distal third. Bolivia. ........................ C. arriagadai   sp. nov.

Pronotal disk without transverse band of pubescence; elytral bands of pubescence along suture not diverging. Brazil (Rio de Janeiro). .................................................................. C. discretus  

Etymology. Cotyclytus arriagadai   is named for Gerardo Arriagada, for his collaboration by sending specimens for study.


Royal British Columbia Museum - Herbarium


Mykotektet, National Veterinary Institute


Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo