Platysognathus, Uchima-Taborda, Lugo-De La Hortúa, Vega-Badillo, Fernández & Zaragoza-Caballero, 2025
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publication ID |
https://doi.org/10.11646/zootaxa.5636.3.11 |
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publication LSID |
lsid:zoobank.org:pub:706E035A-2070-4A3A-9802-099A3E3A6F9D |
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DOI |
https://doi.org/10.5281/zenodo.15595249 |
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persistent identifier |
https://treatment.plazi.org/id/03E68793-FF93-FFFB-5FB2-19A47300FA2E |
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treatment provided by |
Plazi |
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scientific name |
Platysognathus, Uchima-Taborda, Lugo-De La Hortúa, Vega-Badillo, Fernández & Zaragoza-Caballero |
| status |
gen. nov. |
Platysognathus, Uchima-Taborda, Lugo-De La Hortúa, Vega-Badillo, Fernández & Zaragoza-Caballero . gen. nov.
Fig 1 A–E View FIGURE 1 , 2 A–J View FIGURE 2 , 3 View FIGURE 3
Diagnosis: Head wider than long, feebly dorsoventrally flattened ( Fig. 1 C–E View FIGURE 1 ). Mandibles large and anteriorly projected, with a wide medial irregularly rhomboid tooth ( Fig. 2A View FIGURE 2 ). In ventral view submentum expanded and projected, buccal parts such as lacinia and the insertion of the maxillary palps, visible in dorsal view ( Fig. 1E View FIGURE 1 ). Maxillary palps four segmented, labial three segmented ( Fig 2B View FIGURE 2 ). Antennae with 11 antennomeres, biflabellate from IV to X, and antennomere XI filiform ( Fig 1C View FIGURE 1 ). First pro- and mesotarsomere with a ventral tarsal comb, tarsal claws falcated and with basal spines ( Fig. 2C–D View FIGURE 2 ). Elytra short and lanceolate ( Fig. 2E View FIGURE 2 ). Genitalia slightly asymmetrical, parameres with apical teeth, flagellum edge serrated ( Fig. 2 G, I–J View FIGURE 2 ).
Remarks: This genus differs from the rest of Phengodidae with 11 antennomeres by the presence of this characteristic irregularly rhomboid mandibular tooth. Until now, only Euryognathus, Wittmer 1976 had been described with both 11 antennomeres and mandibular tooth; however, in Euryognathus the mandibular tooth is rhomboid while in Platysognathus is irregularly rhomboid with an acute projection in the middle, giving the appearance of a wide apex tooth due to the transect between its anterior emergence to its apex. Additionally, in Euryognathus the antennal flabellae gradually fuse towards the last antennomere, while in Platysognathus are elongated, simple and non-fused to the antennomere.
Description:
Male. Head: Wider than long, longer than pronotum, and dorsoventrally flattened ( Fig. 1A,C View FIGURE 1 ). In lateral view, eyes semispherical and reduced in relation to temples ( Fig. 1B,D View FIGURE 1 ). In both dorsal and ventral view eye is smaller than interocular distance ( Fig. 1C,E View FIGURE 1 ). Interantennal distance wider than scape length and wider than antenal socket width ( Fig. 1C–D View FIGURE 1 ). Clypeus fused to frons, in dorsal view labrum bilobed surpassing clypeus; maxillary and labial palps insertion, as well as lacinia visible between the mandibles ( Fig. 1C,E View FIGURE 1 ). Mandibles large, not occluding, in middle with pronounced mandibular tooth which is irregularly rhomboid ( Fig. 1C View FIGURE 1 , 2A View FIGURE 2 ). In ventral view, with single tentorial fossa, submentum spatulated, anteriorly projected; mandibular insertions large and depressed, strongly marked ( Fig. 1E View FIGURE 1 ). Galea densely setose, maxillary palps four-segmented, labial palps three-segmented ( Fig. 2B View FIGURE 2 ). Antennae 11 segmented, antennomeres 4 to 10 biflabellate, flabellae branching from base of antennomere, flabellae and last antennomere filiform ( Fig. 1C View FIGURE 1 ). Thorax: Pronotum transverse ( Fig. 1C–D View FIGURE 1 ). Elytra short, slightly surpassing first abdominal segment and longer than pronotum ( Fig. 1A View FIGURE 1 , 2E View FIGURE 2 ). Hind wings with anal and radial cells both closed; r4 present and r3 absent, AA3 absent fused to CAS ( Fig. 2F View FIGURE 2 ). Tarsal combs on first pro- and mesotarsomere, tarsal claws falcated ( Fig. 2C–D View FIGURE 2 ). Abdomen: Abdominal segments simple, without expansions. The aedeagus slightly asymmetrical, central lobe wedge-shaped; paramere apex with truncated tooth ( Fig. 2 H–I View FIGURE 2 ). Genital flagellum longer than aedeagus length, border of flagellum serrated ( Fig. 2J View FIGURE 2 ).
Female and larvae unknown.
Etymology: This name is a combination of the words “Platys-” meaning broad, wide and “-gnathus” meaning mandible. This name refers to the wide tooth in the mandible.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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