Xacoxoxotlani Ferreira, 2024
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publication ID |
https://doi.org/10.1590/1806-9665-RBENT-2024-0075 |
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persistent identifier |
https://treatment.plazi.org/id/993B8783-834E-9076-FCCF-0252FD1FF89B |
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treatment provided by |
Felipe |
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scientific name |
Xacoxoxotlani Ferreira |
| status |
gen. nov. |
Xacoxoxotlani Ferreira new genus urn:lsid:zoobank.org:act:2E73260F-5144-41B8-82C3-2D2AE829EA0A
Figs. 2-5 View Figure 2 View Figure 3 View Figure 4 View Figure 5 .
Type species. Xacoxoxotlani chiapensis new species.
Etymology. Xacoxoxotlani , from the Nahuatl, one of the languages spoken by the indigenous people of Central Mexico: Xaco, meaning dark, and xoxotlani, meaning firefly ( Wood, 2024), in allusion to the fact that this is a non-bioluminescent (a “dark”) firefly.
Diagnosis. With the subfamily diagnosis (see above). Pronotum triangular, isosceliform ( Fig.2B View Figure 2 ) (vs. subquadrate or square in Chespirito ); the protibiae 1/3 shorter than profemora ( Fig. 3A View Figure 3 ) (vs. pro- tibiae and femora subequal in length in Chespirito ); antennomeres 3–11 subserrate, dorsoventrally flattened, antennomere 11 distally notched ( Fig.2A View Figure 2 ) (vs. filiform, round in cross section in Chespirito ).
V.S. Ferreira / Revista Brasileira de Entomologia 68(4):e20240075, 2024 5-7
Species Included. Xacoxoxotlani chiapensis new species.
Description. General body coloration dark brown ( Figs. 2A View Figure 2 , 3 View Figure 3 ), pronotal disc, prosternum, and tarsi yellow ( Figs. 2A–B View Figure 2 , 3A–C View Figure 3 ). Body setose, dorsal, thoracic and abdominal pubescence short and erect, sparsely distributed ( Fig. 1 View Figure 1 ), remainder of body with fine light brown pubescence throughout ( Figs. 2–3 View Figure 2 View Figure 3 ).
Body. Head: Longer than wide ( Fig. 3B View Figure 3 ), dorsal texture alveolate ( Fig.3B View Figure 3 ), posteriorly or completely covered by pronotum, prognathous, frons convex and slightly protruding ( Figs. 2A–B View Figure 2 ). Eyes hemispherical, projecting anterolaterally, coarsely granulate ( Figs.2 View Figure 2 , 3A–B View Figure 3 ). Mouthparts: Maxillary palp four-segmented, setose; palpomeres I small, short, ca. ¼ the length of palpomeres II; palpomeres II small, half the length of III; palpomeres III and IV subequal in length, the IV apically truncate and discolored ( Fig. 3B View Figure 3 ). Labial palp apparently three-segmented. Mandibles developed, falciform, small ( Fig. 3B View Figure 3 ). Posterior margin of epistoma emarginate, round ( Fig. 3B View Figure 3 ); labrum indistinct from clypeus, membranous and setose, transverse ( Fig. 3B View Figure 3 ). Antennae: 11-segmented; antennifers separated by a third of antennifer width; in resting upfront position, as long as two-thirds of elytra, densely setose; scape subconic, pedicel ⅓ shorter than precedent, flagellomere 3 subequal in length with the precedent; antennomeres 4–11 subserrate, connected by thin translucent membranes, dorsoventrally flattened; antennomere 11 distally notched ( Figs. 2A–B View Figure 2 , 3A–C View Figure 3 )
Thorax. Prothorax: Pronotum isosceliform ( Fig. 2A–B View Figure 2 ); bordering margins thick; anterior angle slightly bisinuated ( Figs. 2A–B View Figure 2 ); longitudinal carina absent ( Fig. 2A View Figure 2 ); disc alveolate, bearing irregularly shaped cells, relatively larger when compared to cells in adjacent area ( Fig. 2B View Figure 2 ); adjacent area strongly punctate, with small irregular cells smaller than those closer to center ( Fig. 2B View Figure 2 ). Hypomeron concave, closed in front, the inner margin attaining the anterior angle, when viewed laterally, alveolate ( Fig. 3C View Figure 3 ). Prosternum elongate, medially constricted, divided in the middle by a distinct longitudinal suture forming two plates; anteriorly with a narrow inter-coxal process ( Figs. 3A View Figure 3 ). Mesothorax: Mesospiracles tubular, somewhat stout, resting right above mesanepisternum. Mesoventrite subtrapezoidal, medially bearing a distinct keel, posteriorly reaching anterior margin of metaventrite, laterally connected to mesanepisternum; mesepimeron anteriorly touching posterior portion of metanepisternum. Scutellar shield rectangular, slightly notched apically. Metathorax: Metaventrite alveolate, convex, posterolateral angles round ( Fig.3A View Figure 3 ); metadiscrimen complete, metanepisternum and metepimeron elongate, widest in the apex ( Fig. 3A View Figure 3 ). Elytra: dehiscent, 4.5× longer than pronotum, covered with small papillae, each bearing single tiny seta; with two weakly developed costae , secondary costae absent ( Fig. 2A View Figure 2 ). Legs: slender, elongate ( Fig. 2 View Figure 2 ); protrochantin exposed; trochanters pill-shaped; protibiae 1/3 shorter than profemora ( Fig. 3A View Figure 3 ); meso- and metafemora and tibiae subequal in length femora sturdy, slightly fusiform; tibiae slightly clavate, slender; pro- and mesocoxae conical, obliquely positioned, procoxae contiguous, mesocoxae separated, metacoxae transverse; tarsal formula 5-5-5, all tarsomeres narrow; tarsomere I very long, as long as sum of tarsomeres II–IV ( Fig.3C View Figure 3 ), bearing simple claws.
Abdomen with eight ventrites, lantern absent; ventrite 7 trilobed, median lobed round, lateral lobes apically acuminate, pronounced ( Fig.3D View Figure 3 , in green); ventrite 8 obovate, apically entire, not notched ( Fig. 3D View Figure 3 , in red); tergite VIII apically medially notched apically ( Fig. 3E View Figure 3 ). Aedeagal sheath: inserted in the abdomen apex, not externally visible, composed of a dorsal (green) and a ventral plate (red); dorsal plate oval, scoop shaped, tapering toward base ( Fig. 4 View Figure 4 C-4D); ventral plate subdivided in two: a basal, bisinuate ( Fig. 4C–4D View Figure 4 ), and a fusiform, elongate plate, basally fused to basal plate. Male genitalia trilobate, symmetrical ( Figs. 4A–B View Figure 4 ); median lobe sword shaped, apically acuminate; parameres apically round ( Figs. 4A–B View Figure 4 ) shorter than median lobe; phallobase transverse.
Females. Unknown and presumably affected by the paedomorphosis syndrome (see introduction section).
Length (exposed portion of head+pronotum+elytra). 6.2 mm. Width (across humeri). 1.2 mm.
Distribution. Xacoxoxotlani is only known to occur in Chiapas, Mexico ( Fig. 5 View Figure 5 ).
Biology and immatures. Like in Chespirito , immature stages and information about the ecology and biology ofXacoxoxotlani is unknown.
| V |
Royal British Columbia Museum - Herbarium |
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.