Diponthus cribratus ( Serville, 1838 )

Pocco, Martina E., Lange, Carlos E. & Cigliano, María Marta, 2023, Relationships and taxonomy of the genus Diponthus Stål (Orthoptera: Acridoidea Romaleidae), Zootaxa 5336 (1), pp. 33-81 : 48-50

Diponthus cribratus ( Serville, 1838)

( Figs. 3c, d , 7a, b , 8e , 9a, b , 10e , 11e , 12a, b , and 13 ).

Acridium cribratum Serville, 1838 [1839]: 648 (Holotype, female, Uruguay, Montevideo, MNHN París).

Cyrtacanthacris cribratus: Walker, 1870: 552 , 609.

Schistocerca cribratus: Kirby, 1910: 462 ; Berland and Chopard, 1929: 143.

Diponthus cribratus: Dirsh, 1965: 43 ; Carbonell et al. 2023; Cigliano et al. 2023.

Diponthus clarazianus Pictet & Saussure, 1887 n. syn.

Diponthus clarazianus Pictet & Saussure, 1887: 370 (Hololectotype, male, Argentina, “San José, Entre Ríos ”, alolectotype, female, “Colonia Suiza de San José, Entre Ríos” MHNG); Bruner, 1900: 63; Liebermann, 1939: 187; Hollier, 2011; Carbonell et al. 2023; Cigliano et al. 2023.

Nomenclatural comments. After the examination of the type specimens of Diponthus cribratus (Serville) and D. clarazianus Pictet & Saussure , and based on the information provided in the original descriptions and on the examined material from the distribution area of the species, we consider both nominal species actually constitute a single specific entity, being D. clarazianus the junior synonym.

Diagnosis. Pronotal disc with a median dorsal longitudinal yellow band; prozona with two oblique yellow bands extending up to the median sulcus; metazona black mottled ( Figs. 3c, d , and 7a, b ). Prosternal tubercle laterally compressed, apex directed backwards. Tegmina with irregular transverse veins yellow colored, delimiting large cells with blackish central spots ( Fig. 8e ). Hind wings with yellow or tan background, with black spots. Male cerci short, not surpassing the tip of epiproct, slightly down-curved (straight dorsally and with a slight concavity ventrally) ( Fig. 9a ). Epiproct subovoidal with acute apex; tubercles on distal half; furculae small ( Fig. 9b ). Dorsal valves of aedeagus moderately thin, basal two thirds straight with the apex slightly down-curved ( Fig. 10e ). Valves of cingulum placed perpendicular to the dorsal valves of aedeagus (in dorsal view), rod-shaped ( Fig. 11e ). Cingulum opened U-shaped; zygoma wide, anterior margin straight with rounded antero-lateral edges ( Fig. 11e ). Epiphallus with lophi placed parallel to bridge, widely expanded towards the posterior processes of the lateral plates ( Fig. 12a ); superior edges oblique in frontal view ( Fig. 12b ).

Redescription and chromatic characters, and material examined. See Appendix 1

Measurements (in mm). Body length: males: 40.3 (40–41); females: 50.3 (47–53) from fastigium to end of abdomen, 42 (41–43) from fastigium to apex of tegmina. Hind femur length: males: 18 (17–19); females 22.6 (22–24). Tegmina length: males: 26.3 (23–30); females: 28.6 (28–29).

Distribution. This species is found in Argentina (Entre Ríos, Buenos Aires) and Uruguay (Río Negro, Tacuarembó, Montevideo) ( Fig. 13 ).

Figures

FIGURE 3. Diponthus species. Males, habitus lateral views (a, c, e, g, i, k) and dorsal views (b, d, f, h, j, l). Species as indicated. Scale bar= 1 cm. Numbers indicate characters and states used in the cladistics analysis.

FIGURE 7. Head and pronotum, in lateral views (a) and dorsal views (b). Diponthus species as indicated. Numbers indicate characters and states used in the cladistics analysis.

FIGURE 8. Tegmina, color pattern of venation. Diponthus species, as indicated. Numbers indicate characters and states used in the cladistics analysis.

FIGURE 9. Male abdominal terminalia, in lateral views (a) and dorsal views (b). Diponthus species as indicated. Numbers indicate characters and states used in the cladistics analysis.

FIGURE 10. Distal portion of aedeagal valves, lateral view. Diponthus species, as indicated.

FIGURE 11. Distal portion of aedeagal valves, dorsal view. Diponthus species, as indicated.

FIGURE 12. Epiphallus, dorsal views (a) and frontal views (b). Diponthus species, as indicated. Numbers indicate characters and states used in the cladistics analysis.

FIGURE 13. Distribution map of Diponthus species.