Mixaderus tamisieri Gompel 2021, n. sp.
Creators: name: Gompel, Nicolas
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Aderidae
Mixaderus
Mixaderus tamisieri

description: Mixaderus tamisieri n. sp.
(Figures 1b, 2c,j,s)
Etymology. This species is named after my dear friend Jean-Philippe Tamisier, a long-term supporter of my work on Aderidae systematics.
Type locality. France: La Réunion, Saint-Philippe, Mare Longue, (15 m) [21°21’ S 55°45’ E].
Distribution. France: La Réunion.
Description. Body length. ♂: 1.93± 0.07 mm (n=2); ♀: 1.90± 0.35 mm (n=2). Body brown with white markings on the thorax and the elytra. Appendages orange.
Head. Transverse, dark brown on the frons to orange anteriorly between the eyes, slightly wider than pronotum, with large eyes in both sexes. Frons strongly depressed. Palpi orange. Punctuation dense, spaces between punctures equivalent to the puncture diameters, punctures small but deep. Pubescence double, dense, with yellow setae and a whitish-silver pruinosity largely masking the tegument. Eyes interrupting the posterior edge of the head in side view (Figure 2s).
Antennae (Figure 2j). Thin, half (♀) to 3/5 (♂) the length of the elytra, entirely orange, pubescent. Antennomeres 2‒8 regularly cylindrical, as long as wide, antennomeres 9‒10 transverse and conical, and antennomere 11 thick, more than twice longer than penultimate.
Pronotum. Trapezoidal, with larger base against the elytra, sub-quadrate. Convex, marked by a pair of strong and confluent dimples just anterior to the posterior border. Sides straight. Surface, densely punctuated with relatively small deep punctures separated by less than their diameters. Pubescence dense, double, composed of short appressed setae arising from the punctures, and interspersed pruinosity masking most of the tegument. The pruinosity is yellowish, except in the dimples where it is silver.
Elytra. Length: ♂: 1.41± 0.09 mm (n=2); ♀: 1.34± 0.19 mm (n=2). Long, sides subparallel, with humeral callus well marked. Punctuation stronger than on the pronotum, deep and dense, the punctures separated by their own diameters or less. Disc weakly convex. Pubescence dense, wholly, golden, comprised of setae borne from the punctuation and interspersed pruinosity, with a distinct and complex pattern of white-creamish pubescence the elytra. The pattern is composed of a large polygonal patch on the disc, a convoluted strip running laterally on each elytron and connecting the humeral callus to the middle of the declivity, and an apical domain. The different pattern elements are confluent in some specimens, but the boundaries between these pale markings and the brown background are sharp. Scutellum covered with white-creamish pubescence.
Legs. Simple, dark orange.
Sexual dimorphism. Foretarsae somewhat thicker and antennae longer in the ♂.
Aedeagus (Figure 2c). Progressively and regularly tapered from base to apex, phallobase long, a third of the phallus’ length. Accessory lobes of the apicale present, not reaching the apex of phallus.
Type material. France: La Réunion, Saint-Denis, La Grande Chaloupe, (50 m) [20°53’ S 55°22’ E], foliage beating, 14.II.2006 (1 ♀ paratype, MHNRUN); La Réunion, Sainte-Marie, La Ressource, (310 m) [20°56’ S 55°31’ E], light trap, 2.IX.2017, E. Lemagnen leg. (1 ♂ paratype, ELPC); La Réunion, Saint-Philippe, Basse Vallée, (30 m) [21°22’ S 55°42’ E], foliage beating, 7. VI.2012 (1 ♀ paratype, MHNRUN); La Réunion, Saint-Philippe, Mare Longue, (15 m) [21°21’ S 55°45’ E], foliage beating, 31.I.2017, J. Poussereau leg. (1 ♂ holotype, NGPC).
description: Published as part of Gompel, Nicolas, 2021, New Mixaderus species from the Mascarene Islands (Coleoptera: Aderidae), pp. 166-174 in Zootaxa 4969 (1) on pages 169-170, DOI: 10.11646/zootaxa.4969.1.9, http://zenodo.org/record/4746053