Dorynota (Dorynota) borowieci Simões and Sekerka, 2015

Simões, Marianna V. P. & Sekerka, Lukáš, 2015, Review of the Neotropical Leaf Beetle SubgenusDorynota s. str. Chevrolat (Coleoptera: Chrysomelidae: Cassidinae: Dorynotini), The Coleopterists Bulletin 69 (2), pp. 231-254 : 235-236

Dorynota (Dorynota) borowieci Simões and Sekerka , new species

( Figs. 7–8 , 44 )

Type Locality. Brazil, Ceará State, Serra do Baturité .

Type Material. Holotype, pinned: ‘ Serra do Baturité ∣ (Ceará) ∣ Gounelle 1.1895 [w, p, cb] ∥ Museum Paris ∣ Coll. E. Gounelle 1915 [g, p, cb]’

( MNHN). Three paratypes, pinned: same data as holotype, deposited: 2 in LSC, 1 in MNHN. All specimens provided an additional label: ‘ HOLO- TYPE [or PARATYPE respectively] ∣ Dorynota ∣ borowieci sp. nov. ∣ M. Simões & L. Sekerka des. 2014 [r, p, cb] ’.

Diagnosis. Dorynota borowieci belongs to the species group characterized by the uniformly brownish red body, except humerus black dorsally, and subtriangular or U-shaped habitus, with the anterior third of the lateral margins of the elytra abruptly wider than the posterior two-thirds. This new species is quite similar in appearance to four species, D. monoceros , D. pugnax , D. nigra , and D. bidens , by the U-shaped body, but it can be easily separated mainly by its conspicuous, uniform, brownish red dorsal color, except for the black humerus, whereas D. nigra and D. bidens are entirely dark-colored dorsally. In general appearance including color and structure of elytral disc, D. borowieci is most similar to D. monoceros and D. pugnax . The main diagnostic characters to distinguish D. monoceros , D. pugnax , and D. borowieci are summarized on Table 2.

Description. Measurements (n = 4): Body length 12.5–14.0 mm, body width 11.5–12.5 mm, body length/width ratio 1.1, pronotal length 3.0– 3.5 mm, pronotal width 6.5–7.1 mm, pronotal width/length ratio 2.0. Body subtriangular, U-shaped, with anterior 1/3 of the elytral lateral margins abruptly wider than the posterior 2/3. Integument opaque; glabrous, except for short, yellow, sparse setae on pronotum, abdominal sternites and legs. Ground color brownish red, except for antennomeres VI–XI, mouthparts, basal margin of elytra, and humerus black. Antennae with scape and pedicel glabrous, antennomeres III–V with short, sparse setae and VI–XI densely setose with ventromarginal groove. Length ratio of antennal segments 100:37:33:50:67:108:108:83:100:100:133, with XI tapered towards apex. Pronotum approximately 2X wider than long, elliptical, with maximum width in the middle, disc finely and densely punctate; anterior margin sinuous; lateral margins rounded; posterior angles W-shaped. Prosternum with collar projecting laterally, not covering mouthparts; process flat, with concave lateral margins, and acuminate apex expanded laterally. Scutellum rhomboidal, impunctate, smooth, shiny. Elytra with poorly marked crenulate basal margin, lateral and sutural margins flat. Humeral angles strongly expanded anteriorly, reaching to midlength of pronotum laterally, with anterior margin truncate and oblique corner angle. Disc with coarse, large, shallow punctures arranged in rows on the anterior 1/3 and disordered on apical 2/3; intervals distinct, approximately as wide as puncture diameter, smooth, impunctate; explanate margin converging posterad, finely and densely punctate, and distinctly bordered from disc by marginal row of punctures, the latter extending from humeral callus to apex of elytra. Dorsal spine acute, as long as body height, in lateral view tilted posteriorly, with base 2X wider than apex.

Distribution. Brazil (Ceará) ( Fig. 44 ).

Etymology. The species is dedicated to Dr. Lech Borowiec (DBET, Wrocław, Poland), a leading specialist in the Cassidinae .

Figures

Figs. 1–8. Dorynota (s. str.) species. 1) D. aculeata, paralectotype, dorsal view; 2) D. aculeata, paralectotype, lateral view and labels; 3) D. aurita from Mexico (Durango), dorsal view; 4) D. aurita, lateral view; 5) D. bidens from Brazil (Minas Gerais), dorsal view; 6) D. bidens, lateral view; 7) D. borowieci, holotype, dorsal view; 8) D. borowieci, lateral view.

Fig. 44. Geographic distribution of five Dorynota (s. str.) species.