Glyptolenus allegroi, Traces, 2024

Glyptolenus allegroi sp. nov.

(Fig. 10a-d)

ZooBank: https://zoobank.org/ BDC69FA4-8DB9-4B59-8E10-6973CE2F1CC2

Holotype, ♂, Ecuador, Provincia Napo, near San Rafael , 1360 m, 0.105° S, 77.597° W, 28.X.2010, DRM 10.177, D.R. & W.P. Maddison leg. // PM503 NAP2 ( QCAZ). GoogleMaps

Paratype, 1 ♂, Ecuador, Provincia Napo, km 37 Tena-Baeza road, Cocodrilos , 1860 m, 21.VII.1998, P. Moret leg. // Ruisseau en forêt, berge humide ( CPM) .

Diagnostic combination. – Glyptolenus allegroi sp. nov. belongs to the species group of G. rugicollis Bates, 1878 , which is the type species of the genus (Fig. 10g). The main distinctive characters of the rugicollis group are: presence of deep frontal pits; surface of pronotum rugose and/or wrinkled; elytral striae deeply impressed; elytra much wider than pronotum; elytral sides lacking preapical sinuation; all femora with an oval preapical depression on the upper side; sides of tarsomeres 1-4 parallel in all legs, MTT1 as long as MTT2+3+4, MTT4 with long apical lobes, lacking subapical dorsolateral setae (Fig. 10b-c); very long spermathecal duct ( Fig. 9 a-b). Glyptolenus allegroi sp. nov. differs from any other member of this group, except Glyptolenus calvus sp. nov., by the following set of characters: anterior supraocular setae absent; anterior pronotal setae absent; metathoracic wings vestigial; base of elytra narrow, humeri obliquely rounded; only one seta on the third interval.

Description

Habitus . – Fig. 10a. Brachypterous. Body length: 6.5-6.9 mm.

Colour. – Head, pronotum and elytra brownish to piceous black, with more reddish zones on frons, margins of the pronotum, sutura and lateral margins of the elytra; femora and tibiae reddish-brown; tarsi flavo-testaceous; antennae yellowish except antennomere 1 which is reddish;

palpi yellowish. Upper surface smooth on the head, rugose on the pronotum, irregular on the elytra.

Microsculpture, mesh pattern. – Head:veryshallow,slightlytransverse, in some parts almost isodiametric; pronotum: transverse, obsolete; elytra: long, narrow meshes, almost obsolete.

Head. – Broad; eyes big and convex, bordered by a deep supraocular furrow; genae oblique, almost flat, half as long as the eyes; collar constriction shallow. Vertex convex; frontal pits deep; anterior supraocular pair of setae absent. Mentum tooth simple, acutely triangular. Antennae moderately long, with three antennomeres extending backward beyond the base of the pronotum.

Prothorax. – Pronotum transverse (PL/PW = 0.85), cordiform. Surface entirely rugose and transversally wrinkled. Hind angles obtuse and almost sharp, the setigerous pore anterior to hind angle; sides subsinuate, almost straight in basal half, strongly arcuate in distal half; anterior angles small, obtuse, not protruding forwards. Laterobasal impressions shallow; lateral margins narrow; basal bead obsolete, apical bead interrupted at middle; laterobasal pair of setae present, anterior pair of setae absent. Sides of the prosternal process not bordered.

Meso- and metathorax. – Elytra broad, convex, oval-shaped, much wider than pronotum (EW/PW = 1.67). Base narrow, humeri obliquely rounded, apex fusiform; sides evenly arcuate in distal half, without preapical sinuation. Striae broad and deeply impressed, with very faint traces of punctation; intervals almost flat on the disc, convex basally and subconvex apically. Parascutellar setiferous pore present; third interval with only one seta near middle. Umbilicate series of 15 setiferous punctures, distributed 6-6-3. Metathoracic wings vestigial.

Abdomen. – Last visible abdominal ventrite evenly rounded apically, with one pair of setae along its apical margin (setation of females unknown).

Legs. – Relativelyshort.Allfemora withanoval preapicaldepressionon the upper side. Metafemora asetose. Protibiae, mesotibiae and metatibiae dorsally canaliculate. Protarsi of males with adhesive spatulate setae only on the ventral face of the first article. Dorsal face of all tarsi with a median longitudinal furrow separate from the inner and outer sulci; sides of tarsomeres 1-4 parallel in all legs, MTT1 as long as MTT2+3+4 MTT4 with long, parallel apical lobes, lacking subapical dorsolateral setae, outer lobe twice as long as inner lobe (Fig. 10b-c). Ventral face of MTT4 with a dense cover of unordered setae and a pair of apical hyaline phanera. Fifth tarsomeres asetose ventrally.

Male genitalia. – Fig. 10d. Median lobe feebly arcuate; apex short, triangular with a blunt tip. Endophallus without sclerotized structures.

Female genitalia. – Unknown.

Remarks. – In both specimens the pronotal rugosities and the elytral striae were filled with a hardened earthy crust, similar to the “environmental varnish” described for other Glyptolenus species ( Will & Liebherr 2002).