Amblycerus goianiensis Santos & Ribeiro-Costa, 2019

Santos, Aluska Tavares Dos & Ribeiro-Costa, Cibele Stramare, 2019, Rearrangements in some species groups of Amblycerus Thunberg, 1815 (Coleoptera: Chrysomelidae: Bruchinae) including keys, description of a new species, new host plant and distributional records, Zootaxa 4701 (2), pp. 101-148 : 125-126

Amblycerus goianiensis Santos & Ribeiro-Costa , sp. n.

( Figs 14 , 27 , 40 , 53 , 70, 83, 96, 102, 119)

Type. Holotype deposited in DZUP, male, with label: Mineiros—GO\ X-1994 \ Magno Col.

Diagnosis ( Figs 96 ). Amblycerus goianiensis Santos & Ribeiro-Costa , sp. n. is very similar externally and in relation to genitalia to A. insuturatus , from which it differs by the frontoclypeal suture distinct (indistinct in A. insuturatus ), cervical boss with four setae (three setae in A. insuturatus ), the last ventrite almost twice as long as the ventrite IV (almost as long as ventrite IV in A. insuturatus ), internal sac of male genitalia in the apical region with a subtriangular sclerites (with a pair of ovoid sclerites in A. insuturatus ), unpaired median subtrapezoidal sclerite (unpaired wishbone sclerite in A. insuturatus ).

Description. Measurements. BL: 7.9 mm; BW: 4.6 mm.

Integument color ( Figs 14 , 40 , 83 ). Body red, except by light red antennae.

Vestiture ( Figs 14 , 27 , 40 , 53 , 83 ). Body covered with orange setae. Pronotum and elytra uniformly orange. Scutellum light yellow. Pygidium with median stripe of light yellow.

Head ( Fig. 27 ). Frons covered with fine and moderately dense coarse punctures; without frontal carina. Eyes distant from each other anteriorly, ocular index: 3.0; ocular sinus: 1.3. Postocular lobe 0.3 times the eye length. Antennae reaching anterior margin of hindcoxae; serrated from antennomeres 4–10; antennomere 7 about 1.4 longer than wide, last antennomere subelliptic. Frontoclypeal suture distinct. Clypeus covered with fine and moderately coarse punctures except by a narrow apical area. Labrum with few fine punctures on basal margin. Prothorax ( Fig. 53 ). Pronotum trapezoidal with lateral margins slightly curved, covered laterally by coarse and dense punctures ( Fig. 53 ); lateral carina almost reaching the posterior margin of pronotum; cervical boss with four setae; cervical sulcus conspicuous behind eyes. Prosternal process longer than anterior coxae, gently arched between coxae and slightly constricted between coxae. Meso- and metathorax ( Figs 14 , 40 , 70). Scutellum about 1.5 longer than wide, tridentate in apical margin, median tooth longer than the lateral ones (Fig. 70). Elytra with striae strongly impressed, all free apically ( Fig. 14 ). Metepisternum with moderately coarse and sparse punctures ( Fig. 40 ); metepisternal sulcus with transverse axis gently oblique; the longitudinal axis about half the length of metepisternum. Metaventrite not prominent in lateral view, without punctures and with median sulcus longer than a half the lenght of metaventrite ( Fig. 40 ). Metacoxae with coarse punctures ( Fig. 40 ). Hindtibia with lateral spur about twice the length of median spur ( Fig. 40 ). Abdomen ( Figs 40 , 83 ). Ventrites without moderately coarse punctures ( Fig. 40 ); last ventrite almost twice as long as the ventrite IV. Pygidium with apical margin rounded and with dense and moderately coarse punctures ( Fig. 83 ).

Male genitalia ( Figs 96 , 102 ). Median lobe of male genitalia about 4.2 times times as long as its greatest width at apical region ( Fig. 96 ). Ventral valve with lateral margins almost straight and acuminate apex. Dorsal valve subtriangular, with lateral margins almost straight, rounded apically. Internal sac in the apical region with a pair of hollow, ovoid, tuberculate sclerites ( Fig. 96 ). Median region with a pair of blades serrate at lateral margin; with unpaired wishbone sclerite. Tegmen with moderate, rounded, emargination between the enlarged lateral lobes ( Fig. 102 ). Female. Unknown.

Distribution ( Fig. 119 ). Brazil (Goiás).

Life History. No information is available.

Host Plants. Unknown.

Figures

FIGURE 119. Map with the geographical distribution of A. taeniopygus and Amblycerus goianiensis Santos & Ribeiro-Costa, sp. n. Leaked symbols refer to bibliography data.

FIGURES 9–14. Dorsal, group dispar: 9. Amblycerus crassipunctatus, 10. A. dispar, 11. A. insuturatus, 12. A. schwarzi, 13. A. taeniopygus and 14. Amblycerus goianiensis Santos & Ribeiro-Costa, sp. n. Scale bars = 1.0 mm.

FIGURES 22–27. Head, group dispar: 22. Amblycerus crassipunctatus, 23. A. dispar, 24. A. insuturatus, 25. A. schwarzi, 26. A. taeniopygus, 27. Amblycerus goianiensis Santos & Ribeiro-Costa, sp. n. Scale bars = 1.0 mm.

FIGURES 35–40. Lateral. group dispar: 35. Amblycerus crassipunctatus, 36. A. dispar, 37. A. insuturatus, 38. A. schwarzi, 39. A. taeniopygus and 40. Amblycerus goianiensis Santos & Ribeiro-Costa, sp. n. Scale bars = 1.0 mm.

FIGURES 48–53. Pronotum, group dispar: 48. Amblycerus crassipunctatus. 49. A. dispar. 50. A. insuturatus. 51. A. schwarzi. 52. A. taeniopygus and 53. Amblycerus goianiensis Santos & Ribeiro-Costa, sp. n. Scale bars = 1.0 mm.

FIGURES 91–96. Male genitalia, median lobe, group dispar: 91. Amblycerus crassipunctatus, 92. A. dispar, 93. A. insuturatus, 94. A. schwarzi, 95. A. taeniopygus and 96. Amblycerus goianiensis Santos & Ribeiro-Costa, sp. n. Scale bars = 0.25 mm and 500 ʯm.

FIGURES 78–83. Pygidium, group dispar: 78. Amblycerus crassipunctatus, 79. A. dispar, 80. A. insuturatus, 81. A. schwarzi, 82. A. taeniopygus and 83. Amblycerus goianiensis Santos & Ribeiro-Costa, sp. n. Scale bars = 1.0 mm.

FIGURES 97–102. Male genitalia, tegmen, group dispar: 97. Amblycerus crassipunctatus, 98. A. dispar, 99. A. insuturatus, 100. A. schwarzi, 101. A. taeniopygus and 102. Amblycerus goianiensis Santos & Ribeiro-Costa, sp. n. Scale bars = 0.25 mm.