Glyptolenus humicola, Traces, 2024

Glyptolenus humicola sp. nov.

(Fig. 12e-h)

ZooBank: https://zoobank.org/ 914BE5D6-3D70-49E7-AD4A-68E464418C90

Holotype, ♂, Ecuador, Provincia Pichincha, 14.0 km NW Nono, 0°01′58″S, 78°39′19″W, 2000 m, 24.X.1999, montane forest litter 204b, R. Anderson leg. ( CMNC). GoogleMaps

Paratypes ( 6 ♂, 10 ♀).

- 1 ♀, Ecuador, Provincia Cotopaxi, Otonga , 1950 m, forest ground at night, 3-5.VII.2001, P. Moret leg. ( CPM) ;

- 1 ♀, Ecuador, Provincia Cotopaxi, Otonga , 0°25’07.1”S, 79°00’14.0”W, 2065 m, 21-23.VII.2006, P.M. Giachino leg. ( CPMG) GoogleMaps ;

- 1 ♀, Ecuador, Provincia Cotopaxi, Otonga , foresta nublada, 2000 m, 23-30.VII.2004, G. Osella leg. ( CPMG) ;

- 1 ♀, Ecuador, Provincia Cotopaxi, Otonga , 1800 m, 20.X.2000, I. Tapia leg. ( QCAZ) ;

- 1 ♀, Ecuador, Provincia Cotopaxi, La Otonga , 2000 m, ex: mosses, IX.1996, F.Nisch leg.( QCAZ) ;

- 1 ♀: Ecuador, Cotopaxi, San Francisco de las Pampas, Otonga , 2000 m, 29.IV.2014, O. Maioglio leg. ( CGA) ;

- 1 ♂, 1 ♀: Ecuador, Cotopaxi, San Francisco de las Pampas, Otonga , 2000 m, 5.V.2014, O. Maioglio leg. ( CGA) ;

- 2 ♂: Ecuador, Cotopaxi, Otonga , 0°25.012’S, 79°00.140’W, 2065 m, 4.VI.2008, G. Onore leg. ( CGA) GoogleMaps ;

- 2 ♂: Ecuador, Cotopaxi, Otonga , 00°26.166’S, 79°00.204’W, 1975 m, 1.VI.2007, fumigación, C. Proaño & A. Barragán leg. ( CGA) GoogleMaps ;

- 1 ♀, Ecuador, ProvinciaPichincha , Nanegalito, 12 km S, BellavistaNature Reserve, 0°0′54″S, 78°40′56″W, 2200 m, 28.X.1999, ECU1F99 069, ex yellow pan trap, S. Marshall leg. // Loan from SEMC 10.11.00 ( UASM) GoogleMaps ;

- 1 ♀, Ecuador, Provincia Pichincha, Bellavista Reserve , 12 km S Nanegalito, 0°00′32″S, 78°41′08″W, 2150 m, 30.X.1999, 215e, cloud forest litter, R. Anderson leg. // Loan from CMNC 26.02.02 // “ Lachnophorini gen.? G.E. Ball 2002” ( UASM) GoogleMaps ;

- 1 ♂, Ecuador, Provincia Pichincha, Bellavista Reserve , 12 km S Nanegalito, 0°00′32″S, 78°41′08″W, 2150 m, 30.X.1999, 215c, cloud forest litter, R. Anderson leg. // Loan from CMNC 26.02.02 ( UASM) GoogleMaps ;

- 1 ♀, Ecuador, Provincia Pichincha, Bellavista Reserve, Ridge trail, 12km S Nanegalito, 0°00′54″S, 78°40′56″W, 2250 m, 28.X.1999, 211a, cloud forest litter, R.Anderson leg. // Loan from CMNC 26.02.02 ( UASM) GoogleMaps ;

- 1 ♂, Ecuador, Provincia Pichincha, Bellavista Reserve, Ridge trail, 12km S Nanegalito, 0°00′54″S, 78°40′56″W, 2250 m, 28.X.1999, 211d, cloud forest litter, R.Anderson leg. // Loan from CMNC 26.02.02 ( CPM) GoogleMaps .

Description

This species is externally very similar to G. arboricola sp. nov. Its description will therefore be differential and limited to diagnostic characters, the main ones being the absence of the pronotal lateroposterior pair of setae and the quite different form of the apex of the median lobe of the aedeagus.

Habitus . – Fig. 12e. Brachypterous. Body thinner and slightly smaller in average: 5.3-6.2 mm.

Colour. – Head, pronotum and elytra reddish-brown to brownish; legs entirely flavo-rufous to rufo-testaceous; antennae and palpi yellowish.

Microsculpture, mesh pattern. –Head:slightly transverse, veryshallow; pronotum and elytra: transverse, almost obsolete.

Head. – Eyes smaller and less convex; genae nearly as long as the eyes

( G. arboricola sp. nov.: half as long).

Pronotum. – Fig. 12f. More elongate (PL/PW = 1.09); basal and apical beads faintly impressed but visible; lateroposterior pair of setae absent.

Elytra. – Humeri more effaced; striae erased basally, including the first one;Subapical sinuation completely absent. Umbilicate series of 15 setiferous punctures (grouped 5-1-9 or 6-9).

Legs. – Protibiae and mesotibiae dorsally canaliculate; metatibiae dorsally carinate.

Male genitalia. – Fig.12g-h. Median lobe thinner;firsthalf of the median shaft strongly arcuate in lateral view, second half almost straight; apex very different, much longer, spatulate in dorsal view. Endophallus without sclerotized structures. The colour difference in the illustrated specimens (Fig.12c-dandg-h) might be due,in the case of G. arboricola sp. nov., to the non-definitive chitinization of a teneral specimen.

Habitat. – Montane cloud forest between 1800-2250 m a.s.l. This species appears to be predominantly ground-dwelling, mainly in forest leaf litter, according to habitat information provided by the labels of the type specimens. Only two of them were collected by pyrethrum fogging on mossy branches.

Geographic distribution. – Western slope of the Cordillera Occidental in northern Ecuador ( Cotopaxi and Pichincha provinces).

Etymology. – Modern Latin adjective meaning “living in or on the ground”.

Remarks. – Based on the sympatry of G. arboricola sp. nov. and G. humicola sp. nov. in the same localities (Otonga, Bellavista) and on their different ecological specialization, the former being strictly arboreal, the latter predominantly ground-dwelling, it can be hypothesised that they underwent in the same geographic area a speciation process based on ecological niche shift.

d

Fig. 12. Glyptolenus arboricola sp. nov. & G. humicola sp. nov.

a-d. Glyptolenus arboricola sp. nov., ♂ paratype, Otonga. a. Habitus. b. Pronotum. c -d. Genitalia. c. Lateral. d. Ventral. e-h. Glyptolenus humicola sp. nov., ♂ paratype, Bellavista. e. Habitus. f. Pronotum. g -h. Genitalia. g. Lateral. h. Ventral.