Ikaros navarretei, Reyes-Hernández & Hansen & Solodovnikov, 2022

Reyes-Hernandez, Jose L., Hansen, Aslak Kappel & Solodovnikov, Alexey, 2022, Ikaros navarretei (Coleoptera, Staphylinidae, Staphylininae), a new apterous rove beetle species from high elevations in Colombia, Alpine Entomology 6, pp. 13-18 : 13

Ikaros navarretei sp. nov.

Type locality.

Colombia, Cauca, Silvia, 2.5889, -76.24886, 3400 m a.s.l.

Generic placement.

Our specimen fully agrees with the generic diagnosis and description provided by Chatzimanolis and Brunke (2021).

Diagnosis.

Ikaros navarretei sp. nov. can be distinguished from all other species in this genus by the combination of the presence of an arch-like carina on terga III-V; the meshed to isodiametric microsculpture on the dorsal surface of the head, thorax, and mesoscutellum; antennomeres with crown-like macrosetae shorter than the length of antennomere.

Etymology.

The species epithet is in recognition (patronymic) of José Luis Navarrete Heredia for his contribution to the knowledge of the family Staphylinidae and training of many coleopterologists in Latin America.

Type material.

Holotype. Male, point mounted, with genitalia in a separate microvial, with labels as follows: "COLOMB. [COLOMBIA], 20 km E Silvia, Cauca, [~ 2.5889, -76.24886, 3400 m a.s.l.] VII.16.1970 [16 June 1970], II, 000' J.M. Campbell / Xantopygina sic? gen. det. Newton 1998 / HOLOTYPE Ikaros navarretei Reyes-Hernández, Hansen and Solodovnikov, des. Reyes-Hernández, Hansen and Solodovnikov 2022" CNC.

Description.

Habitus as in Fig. 1A . Total body length 10.06 mm. Forebody length 5.25 mm long.

Coloration of body reddish-brown, with abdomen having undertones of metallic green-brown.

Head subrectangular, slightly wider than long, HW/HL ratio = 1.1. Epicranium with numerous large punctures, except impunctate center; punctures not contiguous, the distance between punctures typically equals the width of 1-2 punctures; with transversely meshed to isodiametric microsculpture (Fig. 1B ). Labial palpus with palpomere 3 (apical) widest before the apex. Antennomeres with crown-like macrosetae shorter than length of antennomere.

Pronotum longer than wide, PW/PL ratio = 0.9; surface of pronotum with a median impunctate area as wide as 3-5 punctures; with multiple rows of irregular punctures in addition to rows flanking impunctate center; with meshed to isodiametric microsculpture (Fig. 1C ).

Elytra shorter than pronotum, EL/PL ratio = 0.83. Elytra with large, deep punctures, the distance between punctures equals to width of 0.5-2 punctures; only with isodiametric microsculpture at mesoscutellum, disc of elytra with micropunctuation (Fig. 1D ).

Abdominal terga III-V with arch-like carina (Fig. 1E ), arch-like carina on terga IV and V nearly straight. Male secondary sexual structures with very shallow emargination on sternum VII; with deep, broad V-shaped emargination on sternum VIII; borders of emargination on sterna VII and VIII appearing ‘shaved’ (with no setae); lateral tergal sclerites IX subcylindrical and the same length as sternum IX; tergum X subtruncate medio-apically; sternum IX with basal portion symmetrical, about 0.57 × as long as distal portion and subtruncate apically.

Aedeagus as in Fig. 2 ; in parameral view apex of paramere nearly reaching apex of median lobe (Fig. 2A ); paramere broadest at the middle of its length, converging to rounded tip (violin-like shape), characteristic arrangement of peg setae in two sublateral rows containing 4-5 setae with an additional single setae closer to apex (Fig. 2B ); in lateral view paramere narrower apically; median lobe in dorsal view narrowing to small, rounded apex; in lateral view, median lobe becoming narrower near apex, with one subapical tooth (Fig. 2C ).

Distribution and habitat.

Known only from the type locality near Silvia in the Cauca Department, Colombia (Fig. 3 ).

Note.

In Ikaros navarretei sp. nov. a structure which we call the arch-like carina on the abdominal terga for the sake of compatibility with other literature on Xanthopygina, appears to be somewhat similar to a structure usually called in the Staphylinini literature as the posterior basal tergal carina (PBTC). This is a very different condition from other species of Ikaros and, as far as we are aware, all other Xanthopygina where the arch-like carina is more of a curved fragment that does not reach the spiracles as in the PBTC.

Figures

Figure 1. Dorsal view of Ikaros navarretei sp. nov. A. Habitus; B. Close up of head punctation and meshed to isodiametric microsculpture; C. Close up of pronotum punctation and meshed to isodiametric microsculpture; D. Close up of mesoscutellum and elytra punctation and microsculpture; E. Close up of abdominal tergite III with arch-like carina highlighted by white dashed line.

Figure 2. Aedeagus of Ikaros navarretei sp. nov. A. Aedeagus in parameral view; B. Paramere in antiparameral view with peg setae; C. Aedeagus in lateral view. Scale bar: 1 mm.

Figure 3. Distribution of Ikaros. Elevation colored from green (low) across brown (middle) to white (high). Black square (■) Ikaros apterus. Yellow star (★) Ikaros navarretei sp. nov .. Black circle (●) Ikaros paramo. Black triangle (▲) Ikaros polygonos.