Liodessus picinus, Balke & Suarez-Megna & Ospina-Torres & Venegas & Prieto & Hendrich, 2021
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publication ID |
https://dx.doi.org/10.3897/zookeys.1059.70134 |
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publication LSID |
lsid:zoobank.org:pub:94DF435F-9686-4B70-A041-1921F6A0F68F |
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persistent identifier |
https://treatment.plazi.org/id/AD2344A0-BD40-47BB-B99D-6B20430DC8A1 |
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taxon LSID |
lsid:zoobank.org:act:AD2344A0-BD40-47BB-B99D-6B20430DC8A1 |
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treatment provided by |
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scientific name |
Liodessus picinus |
| status |
sp. nov. |
Liodessus picinus sp. nov.
Figures 1 View Figure 1 , 2G View Figure 2 , 3 View Figure 3
Type locality.
Sumapaz National Park, Bogota, Colombia.
Holotype.
"Colombia, ♀; Bogota D.C., PN Sumapaz; 3,500 m; 13.xi.2018; 4.290°N; 74.207°W; Ospina, Venegas, Balke and Megna (COL_MB_2018_04) Voucher MB8416" (LIAUN).
Paratypes.
2 ♀♀, same data but voucher numbers MB8414, 8415 (ZSM).
Description of holotype.
Habitus with distinct discontinuity between pronotum and elytra (Fig. 1A View Figure 1 ), pronotum widest before base (Fig. 1A, B View Figure 1 ). Total length of beetle 2.0 mm; length without head 1.8 mm; maximum width 0.9 mm.
Color. Very dark brown to blackish dorsally and ventrally, base of meso- and metatibia contrastingly of lighter color (Fig. 1A, B View Figure 1 ).
Surface sculpture. Head with few setiferous punctures in front of a distinct occipital line, distinct microreticulation present except on middle of head between the eyes (Fig. 1B View Figure 1 ); posteriorly of occipital line with distinct microreticulation and few punctures. Pronotum and elytron shiny, with moderately dense and coarse setiferous punctation; pronotum with few wrinkles laterally (Fig. 1B View Figure 1 ).
Structures. Head with distinct occipital line, with rounded clypeus. Antenna stout. Pronotum with distinct lateral bead and distinct, long and deep basal striae (Fig. 1A, B View Figure 1 ). Elytron with short basal striae, without sutural line and without basal epipleural transverse carina. Metathoracic wings not examined in holotype (in paratype: short, about half the length of elytron).
Variation.
One paratype is slightly larger, TL 2.1 mm. In one paratype, the elytral basal striae are not very obvious.
Male.
Unknown.
Etymology.
Picinus, black, highlighting the dark coloration of the species.
Comparative notes.
The species is well characterized by its small size (2.0-2.1 mm total length, shorter than most other Colombian Páramo species ( Megna et al. 2019; Balke et al. 2021) except L. lacunaviridis ( Balke et al. 2021)); dark coloration, discontinuous habitus, shiny surface of pronotum and elytrae, presence of distinct occipital line, distinct basal pronotal striae with short or even faint basal elytral striae.
We assembled sequences of the Colombian species, trimming the sequence ends to avoid missing characters. We obtained a 611 base pair reference alignment to observe sequence variation. Liodessus picinus sp. nov. differs by approx. 9-11% (5′ cox1) from each of the other Colombian species and therefore forms a well-delineated clade with distinct mitochondrial cox 1 signature.
Distinguishing characters of the other Colombian Páramo species from the new species are:
Liodessus azufralis Megna et al., 2019: lighter coloration, brown to dark brown (Fig. 2E View Figure 2 );
L. bogotensis : brighter coloration (Fig. 2A, B View Figure 2 ); L. lacunaviridis Balke et al., 2021 and L. quimbaya Megna et al., 2019: female with dull surface of pronotum and elytron due to presence of fine microreticulation (e.g. Fig. 2C, F View Figure 2 ); L. quillacinga Megna et al., 2019: long, distinct basal elytral stria (Fig. 2D View Figure 2 ).
Distribution.
Only known from the type locality.
Habitat.
Shallow and exposed peatland puddles, collected with strainer out of mats of vegetation including mosses (most likely Sphagnum sp.), Ranunculus sp. and Azolla sp. (Fig. 3B-D View Figure 3 ). The species is syntopic with L. bogotensis .
Checklist of the High Andean species of Liodessus Guignot, 1953
1. Liodessus acollensis Guignot, 1955: Peru
2. Liodessus alpinus Balke, Megna, Zenteno, Figueroa & Hendrich, 2020b: Peru
3. Liodessus altoperuensis Balke, Megna, Zenteno, Figueroa & Hendrich, 2020a: Peru
4. Liodessus andinus Guignot, 1957: Bolivia
5. Liodessus azufralis Megna, Hendrich & Balke, 2019: Colombia
6. Liodessus bogotensis Guignot, 1953: Colombia
7. Liodessus caxamarca Balke, Megna, Zenteno, Figueroa & Hendrich, 2020a: Peru
8. Liodessus hauthi Balke, Megna, Zenteno, Figueroa & Hendrich, 2020b: Peru
9. Liodessus lacunaviridis Balke, Ospina-Torres, Megna & Hendrich, 2020a: Colombia
10. Liodessus picinus sp. nov.: Colombia
11a. Liodessus quillacinga quillacinga Megna, Hendrich & Balke, 2019: Colombia
11b Liodessus quillacinga cochaensis Megna, Hendrich & Balke, 2019: Colombia
11c. Liodessus quillacinga cumbalis Megna, Hendrich & Balke, 2019: Colombia
12. Liodessus quimbaya Megna, Hendrich & Balke, 2019: Colombia
13. Liodessus rhigos Balke, Megna, Zenteno, Figueroa & Hendrich, 2020b: Peru
14. Liodessus thespesios Balke, Megna, Zenteno, Figueroa & Hendrich, 2020b: Peru
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