Dyscolus fabrefactus, Traces, 2024

Traces, Pierre Moret, 2024, Description of new Platynini from the montane cloud forest of Ecuador, with a redefinition of the genera Glyptolenus Bates and Glyptolenoides Perrault (Coleoptera, Carabidae), Faunitaxys 12 (63), pp. 1-23 : 6

Dyscolus fabrefactus sp. nov.

(Fig. 5)

ZooBank: https://zoobank.org/ 6F876D62-34A1-4767-8229-BD8B05E5F64C

Holotype, ♂, Ecuador, Provincia Pichincha, Pahuma , 1720 m, 3.VI.1995, R. Montufar leg. ( QCAZ).

Paratypes (12 ♂, 16 ♀)

- 1 ♂, 1 ♀, Ecuador, Provincia Cotopaxi, Otonga, 1800 m, Río Las Damas , berge, 3-5.VII.2001, P. Moret leg. ( CPM) ;

- 2 ♂, Ecuador, Provincia Cotopaxi, Otonga, 1800 m, Río Esmeraldas, 3-5.VII.2001, P. Moret leg. ( CPM) ;

- 1 ♂, 2 ♀, Ecuador, Provincia Cotopaxi, Las Pampas , 30.XI.1985, L. Coloma leg. ( QCAZ) ;

- 1 ♀, Ecuador, Provincia Cotopaxi, El Corcovado , 25.X.1991, G. Onore leg. ( CMNH) ;

- 1 ♀, Ecuador, Provincia Pichincha, Tandayapa , XI.1986, G.Onore leg.( QCAZ) ;

- 1 ♂, Ecuador, Provincia Pichincha, Tandayapa , XI.1986, F.Reyes leg.( QCAZ) ;

- 1 ♂, 3 ♀, Ecuador, Provincia Pichincha, Calacalí , 26.I.1989, M. Pallarés leg. ( QCAZ, CPM) ;

- 1 ♂, Ecuador, Provincia Pichincha, Palmeras , 28.X.1988, L.Navarrete leg.( QCAZ) ;

- 1 ♂, Ecuador, ProvinciaPichincha, Pahuma , 1800 m, 3.VI.1995,N.O.leg.( QCAZ) ; - 1 ♀, Ecuador, Provincia Pichincha, Otongoro , 23.VI.1987, M. Gaybor. leg. ( QCAZ) ;

- 2 ♀, Ecuador, Provincia Pichincha, Mindo , 78°46’ W, 0°02’ S, 1500 m, 2.II.2001, J. Barreiro leg. ( QCAZ, CPM) ;

- 1 ♀, Ecuador, Provincia Pichincha, 10.4km NW Nono, 0°3′28″ S, 78°36′18″ W, 2500 m, 26.X.1999, under stones near stream, Z.H. Falin leg., ECU1F99 021 // Loan from SEMC 10.11.00 // Dyscolus sp. det. G.E. Ball 2002 ( UASM) ; - 1 ♂, 3 ♀, Ecuador, Provincia Pichincha, tra San Juan e San José , 3.VII.2004, G.Caoduro leg. ( CPMG, CGA) ;

- 1 ♂, Ecuador, Provincia Pichincha, Lloa, Río Blanco , 0°12’37.6”S, 78°40’01.0”W, 2470 m, 1.VIII.2006, G. Caoduro leg. ( CPMG) ;

- 1 ♂, 1 ♀, Ecuador, Provincia Pichincha, Lloa, Río Blanco , 0°12’37.1”S, 78°40’01.9”W, 2410 m, 1.VIII.2006, P.M. Giachino leg. ( CPMG, CPM) ;

- 1 ♀, Ecuador, Provincia Chimborazo, Pallatanga , 1800m, VIII.1986, G. Onoreleg. ( QCAZ) .

Diagnostic combination. – Body length> 12.5 mm, most frequently> 13 mm; pronotum cordiform; fourth metatarsomere longly bilobed, without subapical dorsolateral setae, the outer lobe 2 times longer than the inner lobe; gonocoxite 2 with two atrophied ensiform setae. This combination of characters is unique among the species of Dyscolus known to us.

Description

Habitus . – Fig. 5a. Fully winged. Body length: 12.6-13.9 mm.

Colour. –Body smooth and shiny, piceous-black; legs darkbrown, femora apices reddish brown; palpi reddish brown, paler at apex of each article; antennomeres 1-2 reddish brown with testaceous apices; antennomeres 3-4 brownish with testaceous apices; antennomeres 5-11 reddish brown.

Microsculpture,meshpattern. –Head:transverse, almosterased;pronotum: transverse, faintly impressed; elytra:narrowly transverse, shallowly impressed.

Head. – Broad, very convex, collar constriction conspicuous. Eyes bulging, genae flat, oblique, shorter than eyes. Mandibles robust, moderately long. Mentum tooth simple and acute. Antennae slightly longer than half of the body length.

Prothorax. – Pronotum slightly transverse (PL/PW= 0.92), cordiform. Hind angles right-angled with blunt or nearly rounded tops; anterior angles small and rounded; laterobasalimpressionsdeeply impressed; lateral margin narrow, slightly reflexed; basal bead complete, apical bead interrupted at middle; two pairs of lateral setae.Prosternal process narrow with rounded lateral edges,not bordered.

Elytra. – Long and subparallel, fusiform at apex, humeri broadly rounded. Striae verythin and shallow, with anobsolete punctuation; third interval with 3, 4 or 5setae inserted in small punctures;intervals flat to slightly convex.Subapical sinuation weak; apex separately rounded, or almost triangular with a blunt tip in some specimens.Umbilicate series comprising 17 to 19 setiferous punctures.

Abdomen. – Last visible abdominal ventrite with one pair (♂) or two pairs (♀) of setae along its apical margin (Fig. 5d).

Legs. – Slender, elongate. Metafemora without setae on the anterior ridge and with one or two ventroposterior setae. Dorsal face of all tarsi smooth and convex; fourth metatarsomere without subapical dorsolateral setae, apical lobes parallel, the outer lobe twice as long as the inner lobe. Fifth tarsomeres asetose ventrally.

Male genitalia. – Fig. 5b-c. Median lobe with a stout basal bulb and a long, feebly arcuate shaft; apex acuminate. Endophallus with a subapical ring-shaped squamose area, preceded by a patch of longer and slightly more sclerotized denticles on the dorsal side.

Female genitalia. – Gonocoxite 2 elongate, almost straight, concave dorsally,with two very small atrophied ensiform setaeonthe outer ridge andone smalldorsolateralensiform seta(Fig. 5d).Bursacopulatrix quite elongate, witha median band of lumenal microtrichia covering the dorsal and lateral sides; ventral side with two reniform sclerotized areas. Spermatheca shorter than the spermathecal gland; a diverticulum precedes the spermatheca near the base of the seminal canal.