Dallasiellus (Ecarinoceps) americanus (Stål),

Avendaño, José Mauricio, Grazia, Jocelia & Schwertner, Cristiano Feldens, 2017, Cydninae (Hemiptera, Heteroptera, Cydnidae) in Brazil: updated checklist, new records, and description of Tominotus ondulatus sp. nov., Zootaxa 4329 (5), pp. 401-435: 415-416

Dallasiellus (Ecarinoceps) americanus (Stål)  Edit

( Figs. 7, 8 B)

Aethus americanus Stål, 1860: 12  Edit ; Walker, 1867: 152. Macroscytus americanus: Stål, 1876: 19  Edit .

Geotomus americanus: Signoret, 1883: 34  Edit ; Lethierry & Severin, 1893: 72. Dallasiellus (Ecarinoceps) americanus: Froeschner, 1960: 585  Edit .

Material examined: 1 specimen, PA, Prainha , 06-Jan-1920, Mendes col., MNRJ  Edit ; 1 specimen, RJ, Petrópolis, Alto Mosela , 23-Feb-1956, D'Albuquerque col., MNRJ  Edit ; 4 specimens, Petrópolis, Alto Mosela , 01-Mar-1957, MNRJ  Edit ; 1♀, SP, Luiz Antonio, 13-Aug-2008, Perioto N col., UNIFESP  Edit ; 1♀, RS, Cachoeirinha , 09-Feb-1981, M.H. Galileo col., MCNZ  Edit ; 1♀, Itaúba , 06-Apr-1978, E.H. Buckup col., MCNZ  Edit ; 1♀, Porto Alegre, 30-Oct-1973, Cesar Trois col., MCNZ  Edit .

Distribution: Brazil ( PA new rec., RJ, SP new rec., SC, RS new rec.).

Remarks: The two species of the subgenus that present the evaporatorium not attaining the mesopleural lateral margin; can be differentiated for the number of secondary setigerous punctures on the submargin of mandibular plates along with the mesocorium surface, which is almost impunctate in D. americanus  Edit ( Fig. 8 B) with only one primary setae close to the eye, while in D. foratus  Edit is coarsely punctate and presents three secondary submarginal setigerous punctures on each mandibular plate.

Figures

FIGURE 7. Distribution map of Dallasiellus planicollis, D. solitaria, D. puncticeps, D. americanus and D. megalocephalus in Brazil.

FIGURE 8. Dorsal view of the species of the genus Dallasiellus: D. viduus (A), D. americanus (B), D. megalocephalus (C). Scale bar: 1 mm.