Macarulus, Vlasak & Santos-Silva, 2025

Macarulus gen. nov.

( Figs 76–80 View FIGURES 76–80 )

Type species: Macarulus granitus sp. nov., here designated.

Etymology. Derived from the name of the type locality (Macará) with Latin diminutive suffix “ ulus ”. Masculine gender.

Description. Male. Moderately small-sized body, not flattened ( Fig. 78 View FIGURES 76–80 ), stouter ( Fig. 76 View FIGURES 76–80 ). Head retractile. Frons ( Fig. 79 View FIGURES 76–80 ) not transverse, slightly trapezoidal. Eyes coarsely faceted; not divided or subdivided; distance between upper eye lobes ( Fig. 80 View FIGURES 76–80 ) shorter than diameter of one upper lobe. Antennae ( Fig. 76 View FIGURES 76–80 ) 11-segmented, distinctly longer than body; scape without apical cicatrix, not claviform; antennomere III shorter and not thicker than IV; IV slightly longer than scape and V; ventral surface of basal flagellomeres with moderately abundant erect setae. Antennal tubercles not close to each other, elevated. Prothorax ( Fig. 80 View FIGURES 76–80 ) distinctly wider than long; with lateral tubercles. Pronotum not widely tumid centrally; with elevated, conical tubercle on each side about middle; with slightly distinct central gibbosity. Mesoventral process wider than half width of mesocoxae. Metathorax not shortened. Elytra with strongly elevated centrobasal crest; with moderately abundant erect setae; apex distinctly wider than maximum diameter of metatarsomere I; humeri not spiniform. Femora not claviform. Metatarsomere V about as long as II–III together.

Remarks. Macarulus gen. nov. is similar to Albasor Vlasak & Santos-Silva, 2025 (see photographs on Bezark 2025 and in Vlasak & Santos-Silva 2025), and likewise it can be included in the alternative of couplet “19” with Paraesylacris Breuning, 1940 and Amphicnaeia Bates, 1866 in the key by Breuning (1971). Macarulus differs from Albasor as follows: body stouter; frons not transverse; prothorax with lateral tubercles; centrobasal crest of elytra strongly elevated; and elytral apex distinctly wider than maximum diameter of metatarsomere I. In Albasor, the body is slender, the frons is distinctly transverse, the prothorax does not have lateral tubercles, the centrobasal crest of the elytra is slightly elevated, and the elytral apex is about as wide as the maximum diameter of the metatarsomere I. Although the only known specimen of Albasor is a female, and the only known specimen of Macarulus is a male, these differences cannot be considered sexual dimorphism because they do not occur in other genera of Apomecynini . The new genus differs from Paraesylacris (see photographs on Bezark 2025 and in Martins & Galileo 2001), by the stouter body (slender in Paraesylacris ), prothorax distinctly wider and with lateral tubercles (slender and without distinct lateral tubercles in Paraesylacris ), by the centrobasal crest of elytra strongly elevated (not or slightly elevated in Paraesylacris ), and femora not pedunculate-clavate (pedunculate-clavate in Paraesylacris ). It differs from Amphicnaeia especially by the presence of an elevated centrobasal crest on the elytra (centrobasal crest absent in Amphicnaeia ).