<>
 

Species name

Diabrotica sinuata Olivier 1789: 106; as Altica

 

Type locality

Cayenne

 

Type depository

Unknown (type specimens presumed to be missing)

 

Synonyms

abrupta Fabricius 1801: 453; as Crioceris (type locality: America meridionali; type depository: ZMUC, lectotype, female, verified)

bivittula Klug 1829: 8; as Galleruca (type locality: Süd-Brasilien; type depository: type not identified)

brunneosignata Jacoby 1887: 512; (type locality: Panama, Volcan de Chiriqui; type depository: BMNH, holotype, male, verified) new synonym

capitata Fabricius 1801: 452; as Crioceris (replacement name for Galleruca melanocephala Fabricius 1798: 95)

fulvomaculata Christensen 1943 (1944): 479, 483, 497 (type locality: Misiones, Pindapoy, Argentina; type depository: holotype, Catedra de Zoologíá Agrícola, Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza)

melanocephala Fabricius 1798: 95; as Galleruca (type locality: Cajennae; type depository: type not located)

melanoptera Christensen 1943 (1944): 479, 481, 495 (type locality: La Pampa, Gral. Pico, Argentina; type depository: holotype, Catedra de Zoologíá Agrícola, Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza)

misionensis Christensen 1943 (1944): 479, 482, 496 (type locality: Misiones, Pindapoy, Argentina; type depository: holotype, Catedra de Zoologíá Agrícola, Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza)

ogloblini Christensen 1943 (1944): 479, 482, 496 (type locality: Misiones-Loreto, Argentina; type depository: holotype, Catedra de Zoologíá Agrícola, Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza)

pindapoyensis Christensen 1943 (1944): 479, 485, 501 (type locality: Misiones, Pindapoy, Argentina; type depository: holotype, Catedra de Zoologíá Agrícola, Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza)

quinqueliturata Christensen 1943 (1944): 484, 502 (type locality: Misiones, El Dorado, Argentina; type depository: holotype, Catedra de Zoologíá Agrícola, Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza)

speronii Christensen 1943 (1944): 485, 500 (type locality: Misiones, Pindapoy, Argentina; type depository: holotype, Catedra de Zoologíá Agrícola, Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza)

 

Diagnosis

Body length 5.4-7.9 mm. Body width 2.8-4.2 mm. Head basic color black or rufous. Antennae serrate, with thickened antennomeres 4-8, bi- or tricolored, antennomeres 1-3 yellow, antennomeres 4-8 uniformly cinnamon brown or gradually infuscate by brown, antennomeres 9-10 cinnamon brown or orange rufous, antennomere 11 completely dark (cinnamon brown) or dark apically. Maxillary palpi and labrum black, piceous, amber yellow or amber brown. Pronotum yellow, mustard yellow, yellow ocher or testaceous, subquadrate, nonfoveate, not shagreened or with minute wrinkles. Scutellum black, ochraceous-orange or amber brown. Elytra yellow or rufous, with 2-3 black bands. Elytral patterns extremely variable. Elytron of melanistic specimens about entirely black with two small yellow spots before and after middle and with yellow apex. Another extreme pattern is maculate, with short lines or small spots, usually associated with humeral and sutural black vittae. Vittae and bands black or testaceous, epipleura completely yellow. Humeral plicae absent, sutural angle of elytra round. Abdomen yellow or yellow ocher. Tarsi black, chestnut or yellow with infuscated third tarsomere. Protibia bicolored, yellow, outer edge with piceous or testaceous line, or extensively darkened. Meso- and metatibia uniform yellow, yellow ocher or amber brown, sometimes bicolored, yellow, outer edge with piceous or testaceous line. Femora uniform yellow or yellow ocher. Aedeagus asymmetric, with two internal sac sclerites.

 

Known distribution

Central and South America, Lesser Antilles

 

Host plants

Unknown

 

Remarks

We base the species concept of D. sinuata on descriptions and illustrations, provided by Olivier (1808), Bechyné (1955a) and Barber (1947). We studied Fabricius' type of Crioceris abrupta. The elytra pattern matches Olivier's (1808) figure of Galeruca sinuata just as the figure of Galeruca abrupta. Undoubtedly, it is the same species. After study of the internal sac in a few males similar in morphology and in elytral pattern to these figured specimens, we treat them as the males of D. sinuata. Crioceris tripunctata Fabricius, 1801 was previously treated as a synonym of D. sinuata. However, the study of the type material showed that it is quite different and should be treated as a separate species. This problem is discussed under D. tripunctata (Fabricius, 1801). We studied the internal sac in the holotype of D. brunneosignata, which appeared to be identical with the internal sacs of D. sinuata males. As a result of this study, we treat D. brunneosignata as synonym of D. sinuata.

 

Potential problems with identification

The rounded convex body shape, shining pronotum and elytra, serrate antennae and internal sac of aedeagus allow distinguishing D. sinuata from all other similar species.