Liodessus andinus Guignot, 1957

Balke, Michael, Megna, Yoandri S., Zenteno, Nilver, Figueroa, Luis & Hendrich, Lars, 2020, New Liodessus species from the high Andes of Peru (Coleoptera: Dytiscidae Bidessini), Zootaxa 4852 (2), pp. 151-165: 153-155

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Liodessus andinus Guignot, 1957


Liodessus andinus Guignot, 1957  

( Figs 1D, E View FIGURE 1 , 4B View FIGURE 4 , 6 View FIGURE 6 D–F, 7)

Liodessus andinus Guignot, 1957: 3   (original description); Nilsson & Hajek 2020: 120 (world catalogue).

Type locality. Bolivia, La Paz Dept., Lake Titicaca, Huatajata , ca. 3,900 m, -16.203° -68.694° (our alt / lat / long data inferred from GoogleEarth)   .

Type material. Holotype female ( ZSM). “Titicacasee, Huatajata ca. 4000 m, 6.- 17.7.1954 / Bolivia 1954, leg. W. Förster / Type ♀ / F. Guignot, 1955, Liodessus andinus   n.sp., Type ♀ ”. 3 female paratypes ( ZSM) from the same sampling event. According to Guignot, 1957, there is a male “ Allotype ” from Peru, Chucuito, Lake Titicaca, Chucuito, ca. 3,900m, -15.905° -69.888°, not studied here but possibly stored in the Guignot collection at MNHN.

Other material studied (130 exs.). 2 exs., “ Peru: Cusco, Acomayo, Acopia District, Lagoon Misk′iqocha , 3787 m, 27.viii.2018, -14.123° -71.460°, Y. S. Megna & N. Zenteno ( MUSM, ZSM); ( PER _YSM_2018_35)”   ; 128 exs., “ Peru: Cusco, Canchis, San Pedro District , 3486 m, 27.viii.2018, -14.189° -71.339°, Y. S. Megna & N. Zenteno ( PER _YSM_2018_36)” ( MUSM, ZSM)   .

Notes. This is a moderately large and (in many but not all specimens) appearing more broadly oval species with characteristic coloration of darker spots on otherwise mainly yellowish dorsal surface ( Figs 1D, E View FIGURE 1 ). TL 2.3–2.6 mm, TL-H 2.2–2.3 mm; TW 1.2–1.4 mm. Head with cervical line; pronotum with basal plicae; elytron with short basal plicae. Male genitalia as in Fig. 4B View FIGURE 4 , median lobe in lateral view thickened before apex, paramere with apical piece rather long and narrow. Dorsal surface of male shiny, female dull due to fine mircoreticulation. Metathoracic wings fully developed.

BOLD platform. We provided eight 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 in southeastern Peru and Lake Titicaca of Bolivia ( Fig. 7 View FIGURE 7 ), ca. 3,400 –4,000 m.

Habitat. Shallow and exposed puddles, collected with strainer out of mats of vegetation ( Figs 5C View FIGURE 5 ; 6 View FIGURE 6 D–F). Other Dytiscidae   associated with this species were species of Rhantus Dejean, 1833   and Lancetes Sharp, 1882   .


Bavarian State Collection of Zoology


City Museum














Liodessus andinus Guignot, 1957

Balke, Michael, Megna, Yoandri S., Zenteno, Nilver, Figueroa, Luis & Hendrich, Lars 2020

Liodessus andinus

Nilsson, A. & Hajek, J. 2020: 120
Guignot, F. 1957: 3