Liodessus bogotensis almorzadero, Balke & Neven & Villastrigo & Ospina-Torres & Prieto & Gutierrez Rubiano & Lotta & Dueñas & Hendrich, 2023

Balke, Michael, Neven, Katja, Villastrigo, Adrian, Ospina-Torres, Rodulfo, Prieto, Carlos, Gutierrez Rubiano, Nicolas, Lotta, Ingrid, Duenas, Luisa F. & Hendrich, Lars, 2023, Eastern Colombian Paramo Liodessus Guignot, 1939 diving beetles are genetically structured, but show signs of hybridization, with description of new species and subspecies (Coleoptera, Dytiscidae), ZooKeys 1143, pp. 165-187 : 165

Liodessus bogotensis almorzadero ssp. nov.

Figs 5B , 8B , 10B

Type locality.

Colombia, Santander, Páramo del Almorzadero.

Holotype: Colombia • ♂; Santander, Páramo del Almorzadero; 3,400 m alt.; 31.xii.2020; 6.9410, -72.6775; Prieto leg.; COL_CPr_2020_001; UNAL. Paratypes: Colombia • 26 specimens; same data as holotype; UNAL, ZSM. ZSM specimen imaging number of holotype: ZSM-COL-00103.

Description of holotype.

Habitus narrowly elongate-oval, with slight discontinuity between pronotum and elytra (Fig. 5B ); pronotum widest before base (Fig. 5B ). Total length 2.0 mm; length without head 1.8 mm; maximum width 0.9 mm.

Color. Very dark brown to blackish dorsally and ventrally; lighter on anterior head, lateral pronotum, and bases of meso- and metatibia (Fig. 5B ).

Surface sculpture. Head with a few setiferous punctures in front of a distinct occipital line; fine yet distinct microreticulation present on the entire head. Pronotum and elytron shiny, with moderately dense, coarse, setiferous punctation (Fig. 5B ).

Structures. Head with distinct occipital line, with rounded clypeus. Antenna stout. Pronotum with distinct lateral bead and distinct, long, deep basal striae (Fig. 5B ). Elytron with distinct, short basal striae.

Genitalia. Median lobe of aedeagus typical of the L. bogotensis complex, with slight variation in curvature among individuals in lateral view (Figs 8B , 10B ); parameres simple, of the " Bidessini " type, 2-segmented.

Variation.

Measurements (N = 20). Total length 2.1-2.3 mm (mean 2.18); length without head 1.8-2.0 mm (mean 1.89); maximum width 0.9-1.0 mm (mean 0.96).

Occipital line in a few specimens interrupted, presence still evident.

Color. Usually darkly colored, but a few specimens with paler band-like markings on elytra.

Microreticulation on head sometimes hardly visible on anterior part or frons.

Female variation: see below.

Metathoracic wings. Short, 2/3 of elytral length (in one dissected male paratype).

Female. Elytron with microreticulation on about the posterior 1/2 to 2/3.

Etymology.

Named after the type locality, Páramo del Almorzadero. The word “almorzadero” is a noun in the nominative singular standing in apposition.

Identification notes.

This subspecies is reliably identified only on the basis of the collecting locality and Cox1 data. In the COLLI sequence database, the subspecies has three diagnostic characters different from the other subspecies (Table 1 ).

Distribution.

Only known from the Páramo del Almorzadero (Fig. 1 ).

Habitat.

Exposed, shallow, densely vegetated, stagnant water bodies.

Figures

Figure 1. Map of sampling localities A overview of northwestern South America showing are of sampling depicted in " B " B colored areas represent districts in Paramo: Santanderes (blue), Boyaca (green), and Cundinamarca (brown).

Figure 5. Variation in size and dorsal coloration of subspecies of Liodessus bogotensis A Liodessus b. bogotensis B Liodessus b. almorzadero C Liodessus b. chingaza. Scale bar: 2 mm.

Figure 8. Median lobes in lateral view of Liodessus species A L. bogotensis bogotensis B L. b. almorzadero C L. b. chingaza. Scale bar: 0.2 mm.

Figure 10. Tips of median lobes in ventral view of Liodessus subspecies A L. bogotensis bogotensis B L. bogotensis almorzadero C L. bogotensis chingaza D L. b. lacunaviridis E L. b. matarredonda F L. b. sumapaz. Scale bar: 0.1 mm.