Liodessus acollensis Guignot 1955
Creators: name: Balke, Michael
name: Megna, Yoandri S.
name: Zenteno, Nilver
name: Figueroa, Luis
name: Hendrich, Lars
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Dytiscidae
Liodessus
Liodessus acollensis

description: Liodessus acollensis Guignot, 1955
(Figs 1 A–C, 4A, 5A, B, D, E, 7)
Liodessus acollensis Guignot, 1955: 272 (original description); Nilsson & Hajek 2020: 120 (world catalogue).
Type locality. Peru, Junín, Acolla near Jauja, 3,460 m, -11.743° -75.549°.
Type material. 1 Paratype female in coll. Guignot (MNHN) Perou, Acolla près, Jauja, 3460 m, III-1955 / ♀ / Paratypes. (According to Guignot, 1955, collected in “ I-1954 ”, by F. Blancas).
Other material studied (526 exs.). 5 exs.: “ Peru: Junín, Jauja, Lagoon Tragadero, 3459 m, 04.viii.2018, - 11.767° -75.532°, Y. S. Megna & N. Zenteno (PER _YSM_2018_03)”; 28 exs.: “ Peru: Junín, La Oroya, Nueva Ciudad Morococha, 4244 m, 06.viii.2018, -11.579° -76.07°, Y. S. Megna & N. Zenteno (PER _YSM_2018_04)”; 165 exs.: “ Peru: Junín, Junín, Lagoon Huacra, 4461 m, 14.viii.2018, -11.289° -76.007°, Y. S. Megna & N. Zenteno (PER _YSM_2018_13)”; 7 exs.: “ Peru: Junín, Junín, Lagoon Estancia Azulmito, 4452 m, 14.viii.2018, -11.303° - 76.989°, Y. S. Megna & N. Zenteno (PER _YSM_2018_14)”; 1 ex.: “ Peru: Junín, Junín, Lagoon Yanamyacu, 4327 m, 14.viii.2018,, -11.314° -75.956°, Y. S. Megna & N. Zenteno (PER _YSM_2018_16)”; 25 exs.: “ Peru: Junín, Junín, Shoqui, 4324 m, 15.viii.2018, -11.046° -75.897°, Y. S. Megna & N. Zenteno (PER _YSM_2018_18)”; 5 exs.: “ Peru: Junín, Junín, Shoqui, 4330 m, 15.viii.2018, -11.049° -75.9°, Y. S. Megna & N. Zenteno (PER _YSM_ 2018_19)”; 1 ex.: “ Peru: Junín, Jauja, Lagoon Vinso, Patacancha, 3911 m, 15.viii.2018, -11.921° -75.505°, Y. S. Megna & N. Zenteno (PER _YSM_2018_20)”; 37 exs.: “ Peru: Cusco, Quispicanchi, Marcapata, Yanatturo, 4458 m, 23.viii.2018, -13.634° -71.143°, Y. S. Megna & N. Zenteno (PER _YSM_2018_24)”; 11 exs.: “ Peru: Cusco, Canchis, Checacupe, Cayena, 4613 m, 25.viii.2018, 14.027° -71.114°, Y. S. Megna & N. Zenteno (PER _YSM_2018_29)”; 21 exs.: “ Peru: Cusco, Canas, Layo District, 4122 m, 26.viii.2018, -14.507° -71.064°, Y. S. Megna & N. Zenteno (PER _YSM_2018_30)”; 62 exs.: “ Peru: Cusco, Canas, Langui District, 32. Road 34 G, 3960 m, 26.viii.2018, - 14.434° -71.279°, Y. S. Megna & N. Zenteno (PER _YSM_2018_31)”; 70 exs.: “ Peru: Cusco, Acomayo, Acopia District, Lagoon Pomacanchi, 3675 m, 27.viii.2018, -14.039° -71.496°, Y. S. Megna & N. Zenteno (PER _YSM_ 2018_33)”; 18 exs.: “ Peru: Cusco, Acomayo, Acopia District, Lagoon P′osqoqocha, 3846 m, 27.viii.2018, -14.085° -71.481°, Y. S. Megna & N. Zenteno (PER _YSM_2018_34)”.
Notes. This is a moderately large, oval species with yellowish to brownish dorsal surface; the pronotum is generally rather dark in the middle with paler sides (Figs 1 A–C). Head with cervical line that can be faint in some specimens; pronotum with basal plicae; elytron with short basal plicae. TL 2.1–2.2 mm, TL-H 1.8–1.9 mm; TW 1.0– 1.1 mm. Male genitalia as in Fig. 4B, median lobe in lateral view with apical portion thin, paramere with apical piece moderately long and narrow. Dorsal surface of male shiny, female dull due to fine mircoreticulation. Metathoracic wings fully developed.
BOLD platform. We provided 45 entries in the “COLLI” project, all retrieved in one cluster. Assignment to that cluster was unambiguous, meaning all specimens were correctly assigned to this morphologically delineated species.
Distribution. High Andes, central and southeastern Peru and Lake Titicaca of Bolivia (Fig. 7), ca. 3,400 –4,600 m.
Habitat. Shallow and exposed puddles, collected with strainer out of mats of vegetation (Figs 5A, B, D, E, F; 6C). Other Dytiscidae associated with this species were species of Rhantus Dejean, 1833 and Lancetes Sharp, 1882, as well as Liodessus alpinus sp. nov., L. rhigos sp. nov. and L. thespesios sp. nov.
description: Published as part of Balke, Michael, Megna, Yoandri S., Zenteno, Nilver, Figueroa, Luis & Hendrich, Lars, 2020, New Liodessus species from the high Andes of Peru (Coleoptera: Dytiscidae Bidessini), pp. 151-165 in Zootaxa 4852 (2) on pages 152-153, DOI: 10.11646/zootaxa.4852.2.1, http://zenodo.org/record/4519043