Eurystethus multipunctatus Correia & Fernandes & Campos 2021, sp. nov.

Eurystethus multipunctatus sp. nov.

(Figs. 1C, D; 2C, D; 3E–I; 4)

Etymology. The name refers to the densely and uniformly punctured dorsal surface. Latin: multus, many; punctum, little hole, dot; adjective.

Holotype male. BRAZIL. Distrito Federal. ♂, 32km N Brazilia, nr. Planaltina, 15º 35’’ S / 47º 42 W, 1000m; 17.XII.1997; T. J. Henry coll. [lat. -15.584212; long. -47.692608] (NMNH).

Paratype. ♀, same data as the holotype.

Differential diagnosis. Body small and ovate shared with Eurystethus multipunctatus, E. jo, E. rufodorsatus, E. parvulus and E. microlobatus. E. multipunctatus can be differentiated from these species by the conspicuous spots between the anterior margin of pronotum and the transhumeral tubercles, passing through calli (Fig. 2C), sparse in the others; anteocular angles not developed (Fig. 2C), developed in the others; third tarsomeres dark at apex; and transhumeral tubercles of pronotum and posterior tubercles of scutellum almost inconspicuous (Fig. 2D), conspicuous and high in the others. The female genital plates of E. multipunctatus (Fig. 3I) differ from E. rufodorsatus by the plates more spotted, the sutural angles of valvifers VIII (Fig. 3I, vfVIII) acuminate and divergent, laterotergites VIII (Fig. 3I, laVIII) conspicuously wider than long, and laterotergites IX (Fig. 3I, laIX) rounded and small, barely reaching the mediotergite VIII (Fig. 3I); while in E. rufodorsatus the plates are sparsely spotted, with valvifers VIII contiguous, laterotergites VIII as wide as long, and laterotergites VIII subelliptical. The male genitalia of E. multipunctatus (Figs 3E–H), compared to E. parvulus and E. jo, has ventrally arcuate parameres with apices reaching each other beneath the segment X (Figs 3G, H); posterolateral angles wide and long with convex lateral margins, the dorsal portion forming a conspicuous inner projection reaching the paramere (Fig. 3E, red arrow); and the process of ventral rim forming two small, rounded and parallel projections at middle; while in these species the parameres apices partially reach each other, the posterolateral angles are smaller and simple, without any projection, and the ventral processes have various and unique forms.

Description. Head: Mandibular plates slightly reflexed. Interommatidial sensilla short. Area behind the eyes with a broad black line extending ventrally to the margins of the maxillary plates (Fig. 2D). Ventral surface of head with few and sparse punctures near bucculae. Antennomeres proportions: I~II~III<IV>V. Antennomere I black laterally, apex and part of the ventral side; V yellow on basal third. Intercalary labial unit short, enlarged (sensu Ruckes 1966).

Thorax: Pronotal anterolateral angles directed laterad (Fig. 2C). Anterolateral margins slightly arcuate and weakly projected. Anterior tubercles of scutellum little surpassing the height of transhumeral tubercles in lateral view (Fig. 2D); few punctured spots on posterolateral face of tubercles. Apex of scutellum slightly swollen, reaching the height of the posterior tubercle in lateral view (Fig. 2D). Lateral portions of thoracic pleura with heterogeneously distributed punctured spots, mostly on the lateral margins of meso- and metapleura. Mesosternum dark yellow. Femora with few black spots and reddish marks near apices. Tibiae dark on apices (Fig. 1D).

Abdomen: Connexival segments with punctured spots and reddish marks heterogeneously distributed on anterior and posterior margins of each segment. Urosternites with few and sparse spots. Intersegmental areas light brown, pseudosutures concolor with the abdomen, trichobothrial tubercles and spiracles black.

Female (Fig. 3I): Valvifers VIII (Fig. 3I, vfVIII) with sparse and wide black spots, sutural margins and apices black. Posterior margins of laterotergites VIII (Fig. 3I, laVIII) arched; few black spots near base of laterotergites VIII. Laterotergites IX (Fig. 3I, laIX) less than ¼ the length of valvifers VIII; black on middle and base, margins yellow.

Male (Figs 3E–H): Pygophore ovate. Basal portion of parameres (Figs 3E–F) directed laterad, reaching the posterolateral angles; distal portion convergent; apex truncate with rounded angles, the posterior angles wider than the anterior ones. Process of ventral rim (Figs 3F, H) developed, shield-like and tumid; dorsal portion projected and rounded beneath parameres. Posterolateral angles (Figs 3F–H) rectangular, dorsolaterally directed; lateral margins convex, posterior margins concave, mesial angle acuminate; dorsal surface of posterolateral angles black on base, with a finger-like projection reaching the lateral margin of paramere; ventral surface with punctured spots on base. Ventral margin of pygophore black and densely punctured (Fig. 3F).

Measurements. Female. Total length: 9.4 mm; abdominal width: 6 mm; head length: 2 mm; head width: 1.3 mm; antennomeres length: I, 0.8; II, 0.9; III, 0.95; IV, 1.1 mm; pronotum length: 2.4 mm; pronotum width: 5.8 mm; scutellum length: 4.27 mm; scutellum basal width: 3.38 mm.

Male. Total length: 7.8 mm; abdominal width: 5 mm; head length: 1.7 mm; head width: 1.2 mm; antennomeres length: I, 0.6; II, 0.7; III, 0.8; IV, 1.1; V, 1.1 mm; pronotum length: 1.9 mm; pronotum width: 4.6 mm; scutellum length: 3.44 mm; scutellum basal width: 2.78 mm.

Distribution (Fig. 4). BRAZIL. Distrito Federal: Planaltina.