Dorynota (Dorynota) monneorum 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 : 239-241

Dorynota (Dorynota) monneorum Simões and Sekerka , new species

( Figs. 15–20 , 45 )

Type Locality. Costa Rica, Puntarenas Province, Osa Peninsula, Carara Biological Reserve, Estacíon Quebrada Bonita , approximately 09°46′ N, 84°36′ W 50 m elevation .

Type Material. Holotype, pinned: ‘Est. Queb. Bonita, 50m, Res. Biol. ∣ Carara, Prov. Punt., COSTA ∣ RICA, Abr 1993, R. Guzmán. ∣ L-N- 194500, 469850 [w, p, cb] ∥ Costa Rica INBIO ∣ CR1001 ∣ 370598 [w, p, cb]’. Four paratypes, two females and two of undetermined sex pinned: female, with dissected genitalia in vial, with label data: ‘female [w, hw, cb] ∥ Rancho Quemado , 200m, ∣ Península de Osa , Prov, ∣ Puntarenas, Costa Rica ∣ D. Brenes, Abr 1992 ∣ L-S 292500, 511000 [w, p, cb] ∥ C o s t a R i c a I N B I O ∣ C R1 0 0 0 ∣ 4 9 5 2 0 2 [w, p, cb] ∥ Dorynota ∣ A. Mora D`93 [w, bb, hw, cb]’; female, dissected with abdomen and three apical antennomeres from right antenna mounted on white triangle, with label data: ‘female [w, hw, cb] ∥ Rancho Quemado, Penín- ∣ sula de Osa, 200m. Prov, ∣ Punt., COSTA RICA, ∣ F. Quesada, Nov 1991, ∣ L-S 292500, 511000 [w, p, cb] ∥ Costa Rica INBIO ∣ CR1000 ∣ 45202 [w, p, cb]’; unsexed specimen: ‘ Rancho Quemado, 200m, ∣ Península de Osa, Prov. Punt., ∣ COSTA RICA, Jul 1991. F. ∣ Quesada. L-S- 292500, 511000 [w, p, cb] ∥ Costa Rica INBIO ∣ CR1001 ∣ 407485 [w, p, cb] ∥ Dorynota ∣ sp. ∣ det. Chaboo 2000 [w, bb, hw, cb]’; unsexed specimen: ‘glued leg [w, p, cb] ∥ Brasil AM, Benjamin ∣ Constant VIII. ∣ 1979 A.C. Domingos leg. [w, hw, cb] ’. Holotype and two paratypes deposited in INBIO, one in LSC and one in MNRJ. All specimens provided with additional label : ‘ HOLOTYPE [or PARATYPE respectively] ∣ Dorynota ∣ monneorum sp. nov. ∣ M. V. P. Simões & L. Sekerka des. 2014 [r, p, cb] ’.

Diagnosis. Dorynota monneorum belongs to a species group that is characterized by impunctate elytral intervals and pronotum at most finely punctate but can be distinguished by its shield-shaped body with bisinuate lateral margins of the elytra, a feature so far unique for this taxon. It also can be easily separated from other species by the regularly convex surface of the humeral angles, which is without the carina present in all remaining Dorynota s. str. except D. ohausi . The latter can be easily separated by the uniformly yellowish or reddish brown dorsum, while D. monneorum has the pronotum and elytra with an extensive black pattern and the explanate margins of elytra with two transverse maculae. In general appearance, including color and structure of the elytral disc, D. monneorum is most similar to D. rileyi and D. monoceros , the only two other Dorynota s. str. species with maculae on the explanate margin of the elytra. However, D. monoceros has spots on the underside of the explanate margin, while D. monneorum and D. riley have them on the upper surface. The diagnostic characters to distinguish D. rileyi and D. monneorum are summarized in Table 1.

Description. Measurements (n = 5): Body length 9.1–11.5 mm, body width 8.1–9.2 mm, body length/width ratio 1.2, pronotal length 2.9– 3.3 mm, pronotal width 4.9–5.7 mm, pronotal width/length ratio 1.7. Body slightly longer than wide, shield-shaped, with anterior half wider and sinuate, and posterior half chalice-like, converging posteriad. Integument opaque except for transparent anterior margin of pronotum and explanate margin of elytra; glabrous except for short setae on pronotum and ventral side. Ground color of dorsum yellow; pronotum with black pattern on disc ( Fig. 15 ) and with narrow lateral spots on margins; elytra with extensive black pattern ( Fig. 15 ), explanate margin with narrow posthumeral and wide posterolateral transverse spots; distal 5 antennomeres brownish yellow, remainder yellow; ventral surface brownish black except anterior 2/3 of prosternum, anterior half of metasternum, legs, and sternites I–V yellow. Antennae with 5 basal antennomeres glabrous and distal antennomeres with short setae; scape almost 3X longer than pedicel, tapered towards apex. Length ratio of antennomeres: 100:33: 27:47:60:67:67:53:67:63:100. Pronotum about 1.8X wider than long, elliptical, with maximum width medially, disc finely and sparsely punctate; anterior margin sinuous; lateral margins rounded; posterior angles truncate. Prosternum with prosternal collar projecting anteriorly, not covering mouthparts; process flat, with acuminate, elongate apex. Scutellum rhomboidal, impunctate, smooth, shiny. Elytra with basal margin crenulate, lateral and sutural margins elevated. Humeral angles expanded anteriorly reaching to midlength of pronotum, anterior margin obliquely truncate, with outer margin of humeral corner slightly projecting laterally, followed by sinuous lateral margin. Disc with coarse punctures arranged in discontinuous rows; intervals distinct, approximately as wide as puncture diameter, smooth and slightly forming carinae: 2 posthumeral (on 1 st and 2 nd intervals), one reaching ½ and other ¼ of disc, and 2 dorsal (on 3 rd and 4 th intervals), stretching from basal ¼ of disc to apical ¾; explanate margin converging posterad, with fine, sparse punctures, distinctly bordered from disc by marginal row of punctures, extending from humeral callus to apex of elytra, interrupted by 2 transverse ridges around midlength; surface of humeral angle regularly convex without carina. Dorsal spine acute, almost 1.5X longer than body height; in posterior view, base 2.5X wider than apex. Female terminalia as in Figs. 17–20 . Sternite VIII ( Fig. 17 ) somewhat sclerotized with median setae at apical margin, shortening laterally; lateral arms membranous, fused to sternite IX, forming transverse membranous sacs; apodemes as long as width of apical region. Sternite IX ( Fig. 20 ) subdivided into 2 plates with long, erect setae at apical margin. Tergite X ( Fig. 18 ) with 2 regions next to sclerotized apical margin, densely setose, with a mixture of short and erect setae on the edge. Spermatheca ( Fig. 19 ) strongly sclerotized and curved, with apex parallel to base, abruptly tapered, 2X wider than at middle. Duct of spermathecal gland strongly coiled and long, ca. 6X longer than spermatheca.

Distribution. Brazil (Amazonas) and Costa Rica (Puntarenas) ( Fig. 45 ).

Etymology. The species is named after Dr. Miguel Monné and Dra. Marcela Monné, Museu Nacional/ Universidade Federal do Rio de Janeiro.

Figures

Figs. 15–22. Dorynota (s. str.) species. D. monneorum: 15) Holotype, dorsal view; 16) Lateral view; 17) Sternite VIII; 18) Tergite X; 19) Spermatheca; 20) Sternite IX. D. nigra, lectotype: 21) Dorsal view; 22) Lateral view and labels.

Fig. 45. Geographic distribution of five Dorynota (s. str.) species.