Aristopus picturatus ( Andrewes, 1920 ) Fedorenko, 2021

Fedorenko, D. N., 2021, Notes on the genera Aristopus, Cosmodiscus and Metabacetus (Coleoptera: Carabidae: Pterostichini: Abacetina), with description of three new species from Vietnam, Russian Entomological Journal 30 (4), pp. 413-429 : 423-424

2. Aristopus picturatus ( Andrewes, 1920) , comb.n.

Figs 19 , 40–41 , 51, 58–59 .

Andrewes, 1920: 447 ( Cosmodiscus ; Nagpur, Maharashtra, India); 1921: 345; 1930: 131.

MATERIAL. 6♂♂, 2 ♀♀ ( ZISP), Sri Lanka, Vilpattu , Talawila , 8–9.X.1982 (Medvedev); 2♀♀ ( SIEE), Sri Lanka, Anuradhapura env., Amaya Lake Hotel, at light, 16.X.2009 (S. Dementiev) .

DIAGNOSIS. The only Oriental species of Aristopus sharing substantial features such as the presence of parascutellar seta and discal seta d2 on the elytra with African and Madagascan congeners. The elytral pattern as for the previous species, except that the humeral elytral macula is long, running on basal 1/2–3/5 and rather narrowly separated (vs. short and widely separated) from the anterior preapical macula on intervals 4 and 5.

REDESCRIPTION. BL 5.9–7 mm. Body ( Fig. 19 ) shiny, reddish brown to brown black, clypeus entirely or in anterior half, labrum, mouthparts, legs and antennae red; explanate lateral margins of pronotum, elytral epipleura and pattern reddish yellow. Elytral pattern as for the previous species, except as follows: humeral spot long, running on basal 1/2–3/ 5 and spanning intervals 5–8 anteriorly and 5–7 behind; anterior and posterior preapical spots fused along stria 3. Dorsal microsculpture (in specimens examined) absent from the forebody, elytral microsculpture consisting of extremely fine and very dense transverse lines and thence slightly iridescent.

Head with fairly large, almost hemispherical eyes. Frontal sulci short, deep and strongly divergent, not reaching anterior supra-ocular seta. Labrum apically subsinuate. Antennae just reaching or barely surpassing pronotal base. Mentum tooth medium-sized, truncate and subsinuate.

Pronotum subquadrate, two fifths to half wider than long, PW/PL 1.40–1.50 (1.47, n=7), than two thirds wider than head, PW/HW 1.63–1.70 (1.67). Sides rounded, explanate lateral margin slightly reflexed, narrow to indistinct in front of anterolateral seta, increasingly wide toward and moderately wide at basal angles, these obtuse and blunt; lateral bead fine, entire, vague at basal angles. Base wider than apex, PB/PA 1.30–1.46 (1.41), truncate medially, slightly oblique and finely beaded outside basal sulci. These deep, parallel, running on basal third. Apical margin truncate to slightly concave; apical angles obtuse and blunt, barely projecting or not; apical bead obliterate in middle third (and vestigial laterally in specimens examined). Medi- an line very fine. Disc convex and smooth, basal sulci densely, moderately to vaguely punctate at bottom, without or with a few punctures at sides, explanate lateral margin punctate in a similar manner.

Elytra, ventral side and legs as for previous species except as follows, EL/EW 1.34–1.38 (1.36), EW/PW 1.24– 1.32 (1.28), oval, more dilated apicad. Humeral tooth nearly indistinct. Intervals flat, convex apically. Parascutellar seta at base of stria 2, discal seta d2 adjoining stria 2 tree fifths from base. USS: 6–1–7 or 7–7, i.e., intermediate seta ( US 7), distinctly or much closer to US 6 than to US 8; US 10 large, adjoining stria 8 and slightly separated from stria 9.

Prosternal process without or with vestigial yet distinct apical bead.

Legs. Protibia with three latero-apical spines. Metafemur bisetose at anterolateral margin. Mesotibia with inner setal brush consisting of 7+1 or 8+1 setae; metatibia with three spiniform setae.

Aedeagus ( Figs 40–41 , 51, 58–59 ):Aedeagus more curved ventrad than in A. humeratus sp.n., with internal sac and parameres different in shape.

GEOGRAPHIC DISTRIBUTION. India: Maharashtra, Uttar Pradesh, Orissa, Andhra Pradesh ; first recorded in Sri Lanka.

HABITATS AND HABITS. No data, except that the specimens examined have been collected at light.

COMMENTS. The adults from two different local populations in Sri Lanka have been found to be considerably different in the ratio PB/PA, being either 1.30–1.37 (n=2) or 1.42–1.46 (1.44, n=5) in specimens from Anuradhapura or Vilpattu, respectively

Figures

Figs 19–24. Dorsal habitus: 19 — Aristopus picturatus, ♀ from Anuradhapura env., Sri Lanka; 20 — A. humeratus sp.n., paratype ♂ from env. Pai, Thailand; 21 — Cosmodiscus platynotus, ♀ from the Bi Doup — Nui Ba Nature Reserve; 22 — C. rufoapicalis sp.n., holotype; 23 — C. rufolimbatus, holotype; 24 — C. louwerensi, paratype. Рис. 19–24. Габитус дорЗально: 19 — Aristopus picturatus, ♀ иЗ окр. Анурадхапура, Шри Ланка; 20 — A. humeratus sp.n., паратип ♂ иЗ окр. Паи, Таиланд; 21 — Cosmodiscus platynotus, ♀ иЗ Запов. Бидуп-Нуйба; 22 — C. rufoapicalis sp.n., голотип; 23 — C. rufolimbatus, голотип; 24 — C. louwerensi, паратип.

Figs 38–49. Median lobe of aedeagus: 38–39 — Aristopus humeratus sp.n., paratype ♂ from env. Pai, Thailand; 40–41 — A. picturatus, ♂ from Vilpattu, Sri Lanka; 42–43 — Cosmodiscus platynotus; 44–45 — C. rufoapicalis sp.n., holotype; 46–47 — C. louwerensi, paratype; 48–49 — C. mirei; 38, 40, 42, 44, 46, 48 — left aspect; 39, 41, 43, 45, 47, 49 — right aspect; vc — ventral longitudinal carina. Scale bars: 1 mm. Рис. 38–49. СреднЯЯ долЯ Эдеагуса: 38–39 — Aristopus humeratus sp.n., паратип ♂ иЗ окр. Паи, Таиланд; 40–41 — A. picturatus, ♂ иЗ Вильпатту, Шри Ланка; 42–43 — Cosmodiscus platynotus; 44–45 — C. rufoapicalis sp.n., голотип; 46–47 — C. louwerensi, паратип; 48–49 — C. mirei; 38, 40, 42, 44, 46, 48 — слева; 39, 41, 43, 45, 47, 49 — справа; vc — продольный вентральный киль. Масштаб: 1 мм.

Figs 50–67. Aedeagus: 50, 56–57 — Aristopus humeratus sp.n., paratype ♂ from env. Pai, Thailand; 51, 58–59 — A. picturatus, ♂ from Vilpattu, Sri Lanka; 52, 60–61 — Cosmodiscus platynotus; 53, 64–65 — C. rufoapicalis sp.n., holotype; 54, 62–63 — C. louwerensi, paratype; 55, 66–67 — C. mirei; 50–55 — median lobe, ventral aspect; 56, 58, 60, 62, 64, 66 — right paramere, left aspect; 57, 59, 61, 63, 65, 67 — left paramere, right aspect. Scale bar: 1 mm. Рис. 50–67. Эдеагус: 50, 56–57 — Aristopus humeratus sp.n., паратип ♂ иЗ окр. Паи, Таиланд; 51, 58–59 — A. picturatus, ♂ иЗ Вильпатту, Шри Ланка; 52, 60–61 — Cosmodiscus platynotus; 53, 64–65 — C. rufoapicalis sp.n., голотип; 54, 62–63 — C. louwerensi, паратип; 55, 66–67 — C. mirei; 50–55 — среднЯЯ долЯ вентрально; 56, 58, 60, 62, 64, 66 — праваЯ парамера слева; 57, 59, 61, 63, 65, 67 — леваЯ парамера справа. Масштаб: 1 мм.