Platysognathus amazonicus Uchima-Taborda, Lugo-De La Hortúa,Vega-Badillo, Fernández & Zaragoza-Caballero, 2025

Uchima-Taborda, Diego, Hortúa, Andrés Lugo De La, Vega-Badillo, Viridiana, Fernández, Fernando & Zaragoza-Caballero, Santiago, 2025, Platysognathus gen. nov. a new genus of railroad-worm beetle (Coleoptera: Phengodidae, Mastinocerinae) from Colombian Amazonía, Zootaxa 5636 (3), pp. 577-586 : 579-581

publication ID	https://doi.org/10.11646/zootaxa.5636.3.11
publication LSID	lsid:zoobank.org:pub:706E035A-2070-4A3A-9802-099A3E3A6F9D
DOI	https://doi.org/10.5281/zenodo.15595251
persistent identifier	https://treatment.plazi.org/id/03E68793-FF93-FFFD-5FB2-1F2074D9F857
treatment provided by	Plazi
scientific name	Platysognathus amazonicus Uchima-Taborda, Lugo-De La Hortúa,Vega-Badillo, Fernández & Zaragoza-Caballero
status	sp. nov.

Treatment

Platysognathus amazonicus Uchima-Taborda, Lugo-De La Hortúa,Vega-Badillo, Fernández & Zaragoza-Caballero sp. nov.

Fig. 1 A–E View FIGURE 1 , 2 A–J View FIGURE 2 , 3 View FIGURE 3

Examined material:

Holotype: Colombia: Vaupés: Estación Biológica Mosiro-Itajura ( Caparú ) - Centro Ambiental , 1°4’S - 69°31’W, 20/ 01-1/02/2003, 60 msnm, Trampa Malaise , M. Sharkey, IAvH-E-262320 (Pinned) (1 Male). GoogleMaps

Paratypes: Colombia: Caquetá: PNN Serranía de Chiribiquete - Cuñaré-Amú, Bosque tierra firme, 0°13’N - 72°25’W, 19–22/02/2001, 300 msnm, Trampa Malaise, E. González, IAvH-E-262323 (Alcohol) (1 Male), GoogleMaps Ídem except for IAvH-E-262324 (Alcohol) (1 Male). GoogleMaps Ídem except for 0°30’N - 72°38’W, 1–5/11/2000, Trampa Malaise, E. González, IAvH-E-262325 (Pinned) (1 Male). GoogleMaps Vaupés: Estación Biológica Mosiro-Itajura ( Caparú ) - Antigua Cabaña , 1°4’S - 69°31’W, 9–14/04/2004, 60 msnm, Trampa Malaise, J. Pinzón, IAvH-E-262318 (Alcohol) (1 Male), GoogleMaps IAvH-E-262321 (Alcohol) (1 Male). Ídem except for 21–28/04/2004, 60 msnm, Trampa Malaise, J. Pinzón, IAvH- E-262322 (Alcohol) (1 Male). Ídem except for Estación Biológica Mosiro-Itajura ( Caparú ) - Centro Ambiental , 1°4’S - 69°31’W, 20/ 01–01/02/2003, M. Sharkey, IAvH-E-262319 ( Pinned ) (1 Male). GoogleMaps

Diagnosis: Eyes small, semispherical, in dorsal view interocular distance five times eye width, in ventral view 4.7–5 times ( Fig. 1C–E View FIGURE 1 ). Mandibular tooth irregularly rhomboid with a medial acute projection ( Fig. 2A View FIGURE 2 ). Maxillary palps around three times longer than labial palps, maxillary palpomere IV sub equal to II + III and obovate; labial palpomere III longer than I + II, fusiform and thickened in the middle ( Fig 2B View FIGURE 2 ). Scape longer than antennomeres II + III, flabellae short and slightly widened towards the apex ( Fig 1C View FIGURE 1 ). Pronotum transverse, quadrangular, anterior border straight, posterior border, sides and corners rounded ( Fig 1C View FIGURE 1 ). Elytra short, surpassing the second abdominal segment ( Fig. 1A View FIGURE 1 , 2E View FIGURE 2 ). Genitalia asymmetrical, parameres with an apical tooth ( Fig. 2 G–I View FIGURE 2 ) and genital flagellum with a strongly serrated edge ( Fig. 2 J View FIGURE 2 ).

Description: Male.

Color: Body in general orange yellow, with exception of antennae slightly clearer, elytra brown darkened at middle and lighter towards apex, legs lighter than body ( Fig 1 A–B View FIGURE 1 ).

Total length 8.6, width at shoulders high 1.66. Head: Head wider (1.78) than long (1.40), 1.4 times as wide as pronotum ( Fig. 1A,C View FIGURE 1 ). Eyes small and reduced (0.48) when compared to the temples (0.56), latter straight in its basal half, abruptly expanding near middle, then convex to reach eye ( Fig. 1 C,E View FIGURE 1 ). Eyes semispherical, posterior border oblique near straight, in lateral view taller (0.48) than long (0.46); interocular distance in dorsal view wide (1.29), five times eye width (0.27) in ventral view 4.7 times ( Fig. 1 C–D View FIGURE 1 ). Antennal insertions covered with disperse punctuation with foveae smaller than its lumen, punctuation similar in vertex. Interantennal distance wide (0.68) 1.8 to 2 times scape length (0.37) ( Fig 1C View FIGURE 1 ). Frontoclypeus anterior border undulated, concave, weakly projected medially, this projection apically truncated, with sparse and scarce punctuations. In dorsal view, membranous and bilobed labrum surpassing frontoclypeus and lacinia; insertion of maxillary and labial palps visible between mandibles ( Fig 1C View FIGURE 1 ). Mandibles prominent (1.05) mandibular tooth irregularly rhomboid with medial acute projection (0.27), tooth angles feebly projected giving a bilobed tooth appearance, in general both teeth asymmetrical, left convex, right sinuated ( Fig. 1C View FIGURE 1 , 2A View FIGURE 2 ). Mentum spatulated, anteriorly projected; mandibular insertion large, depressed, strongly pronounced ( Fig. 1E View FIGURE 1 ). Maxillary palps three times longer (0.8) than labial palps (0.24); maxillary palps with thickened insertion, palpomere I small, 2.5 times shorter than II, II longer than III, both fusiform, IV sub equal to II + III and obovate; first labial palpomere shorter than the others, II shorter than III, III longer than I + II; I–II cylindrical, III fusiform medially thickened ( Fig. 2B View FIGURE 2 ). Antennae (2.48) feebly surpassing pronotum posterior border, flabellae short and expanding towards apex, flabellae of antennomeres IV–VI from 2.5 to 2.9 times longer than its respective antennomere. Scape (0.37) longer than II + III (0.23), last antennomere S-shaped ( Fig 1C–E View FIGURE 1 ). Thorax: Pronotum rectangular, wider (1.56) than long (1.23), posterior border straight feebly undulated, lateral borders basally straight, curving from last quarter to apex; posterior corners right-angled, not expanded, posterior border and corners curved, lateral borders not expanded. Disc punctuation superficial, lumen feebly chagrined and greater than puncture diameter. Prosternum posterior border and procoxa external border straight ( Fig. 1D–E View FIGURE 1 ). Scutellum nearly as wide (0.26) as long (0.28), posterior border convex. Elytra short, subtriangular, length (2.19) 2.73 times its width at shoulder height (0.80), 1.7 times pronotum length, surpassing first abdominal segment; covered by disperse punctation, lumen subequal to puncture diameter, punctuation denser towards apex ( Fig 1A View FIGURE 1 , 2E View FIGURE 2 ). Hind wing length (4.3) 2.38 times width (1.8), radial cell closed, r4 complete reaching radial cell and RP, r3 absent, reduced RP not reaching half of MP1 + 2, midfield with five main veins MSP, MP3, MP4, CuA2, CAS; CuA1, AA4 and CuP reduced and fused, AA3 + 4 straight, AA3 fused to CAS, AA4 absent, AP well marked, AP3 + 4 long ( Fig. 2F View FIGURE 2 ). Mesosclerite and metasclerite sparsely punctuated, puncture diameter smaller than lumen. Tibiae 1.2 to 1.5 times longer than tarsi; tarsal combs on first pro- and mesotarsomere, with seven and nine denticles respectively, first tarsomere nearly as large as 2nd and 3rd together, fourth smaller than the rest and one quarter of the length of the first, tarsal claws falcate with two spines at base, claws separated in straight angle ( Fig. 2B–C View FIGURE 2 ). Abdomen: Tergites and ventrites surface lustrous and covered by superficial punctuation. Genitalia with central lobe wedge-shaped; left paramere smaller than right, paramere apex with one truncated flattened tooth, covered with long and clear setae. Left paramere curves and anchors slightly behind the central lobe, while the right paramere protrudes anteriorly ( Fig. 2 G–I View FIGURE 2 ). Genital flagellum 1.5 times aedeagus length, edge of this flagellum strongly serrated ( Fig. 2J View FIGURE 2 ).

Distribution: Amazonic ecosystems, in the biogeographical province Imeri ( Morrone et al. 2022), known to occur in the PNN “Serranía del Chibiriquete” and in the biological station “Mosiro Itajurá-Caparú” ( Fig. 3 View FIGURE 3 ).

Etymology: the species name “ amazonicus ” refers to the amazonic ecosystems where the species is distributed, the PNN “Serranía del Chibiriquete” and in the biological station “Mosiro Itajurá-Caparú”.