Anomala unilineata Filippini, Galante, and Micó, 2015

Filippini, V., Galante, E. & Micó, E., 2015, Descriptions of New Species ofAnomalaSamouelle (Coleoptera: Scarabaeidae: Rutelinae) from Costa Rica, The Coleopterists Bulletin 69 (3), pp. 463-476 : 474-475

Anomala unilineata Filippini, Galante, and Micó , new species

( Figs. 8 , 16 , 24 , 32 , 36 )

Type Material. H o l o t y p e: ♂ "S a nt a R o s a National Park Guanacaste Prov. COSTA RICA. 17–19 May 1980 DH Janzen & W. Hallwachs / INBIOCRI001117054" deposited at MNCR. Paratype : 1♂ " Santa Rosa National Park Guanacaste Province Costa Rica. D. H. Janzen 5–12 March 1978 / INBIOCRI001118447", deposited at MNCR .

Holotype. Male ( Fig. 8 ). Body oval. Length 8.52 mm, width 4.27 mm. Head and pronotum dark bronze-brown with green luster. Scutellum dark bronze-brown. Elytra ochre with dark brown suture and median wavy band. Pygidium reddish brown. Legs from yellowish to dark brown. Venter reddish brown. Head: Clypeus trapezoidal, with anterior angles widely curved, surface densely punctate-reticulate, convex. Anterior margin straight, thin in frontal view, width/length ratio 2.03. Frons punctate, less densely than clypeus, with a triangular concavity. Ocular canthus long, thin, with acute apex. Ratio of interocular width/width of eye 2.71. Ratio of antennal funiculus/club 0.7. Pronotum: Subtrapezoidal. Ratio width/length 1.57. Lateral margins regularly convex. Anterior angles acute, posterior angles obtuse. Basal margin complete. Surface with fine, dense punctures. Scutellum: Subtriangular, with rounded sides and blunt apex. Ratio width/length 1.16. Surface sparsely punctate. Elytra: With costae defined by regular rows of punctures. Subsutural interstice with 1–2 rows of sparse punctures, 2 nd –4 th interstices with 1 irregular, secondary stria. Pygidium: Strigate with long setae on posterior margin. Ratio width/length 1.64. Venter: Space between mesocoxae narrow, flat. Mesometasternal suture well-defined at base of mesocoxae. Abdominal sternites with 1 row of setae and 2–4 rows of punctures per sternite. Last sternite strigate, with subapical bead thin and sinuate, apical membrane thin. Legs: Protibia ( Fig. 16 ) bidentate, apical tooth long and curved, basal tooth below internal apex of protibia triangular, sharp, acute. Metatibia stout, fusiform. Ratio length/width 3.27. First external carina well-developed. Surface rugose. External protarsal claw strongly curved, internal claw bifurcate, with upper branch of same length and half width of the lower one, inferior margin sinuate. Male genitalia: Parameres with acute blunt apex in lateral view ( Fig. 24 ). Endophallus ( Fig. 32 ) elongate, dorsally covered with setae, and with 2 ventral patches of sclerotized setae. Sclerotized, flat plate present on ventral inflation, where ejaculatory duct opening is located.

Female. Unknown.

Variation. One paratype. Head, pronotum, and venter vary from reddish to dark brown. Body length 7.74–8.52 mm, body width 4.27–4.28 mm. Clypeal width/length ratio 2.03–2.07. Ratio of interocular width/width of eye 2.71–2.83. Ratio of antennal funiculus/club 0.70–0.73. Pronotal width/length ratio 1.57–1.60. Scutellar width/ length ratio 1.16–1.22. Metatibial length/width ratio 2.96–3.27.

Etymology. From the Latin adjectives unus, -a, -um, one, and lineatus, -a, -um, striped, for the single band across the elytra.

Distribution. This species occurs in the dry forest in northeastern Costa Rica, from 220 to 300 m elevation ( Fig. 36 ).

Diagnosis. This species is recognized by its small size, pronotum dark bronze-brown, elytra ochre with dark brown, median, wavy band, and endophallus elongated with two ventral patches of sclerotized setae.

Another species with one transverse band on the elytra is Anomala donovani Stephens, 1830 , but it is larger, with a black pronotum, pigmented punctures on the elytra, and shaded apical portion of the elytra. Other small species, like Anomala discoidalis Bates, 1888 , Anomala retusicollis Bates, 1888 , Anomala tessellatipennis Blanchard, 1851 , and Anomala undulata (Melsheimer, 1844) have the elytral pattern formed by isolated maculae, not forming a continuous band, and differently shaped parameres and endophalli.

Figures

Figs. 1–8. Anomala species holotypes, habitus. 1) A. coffea; 2) A. cyclops; 3) A. divisa; 4) A. mersa; 5) A. mesosticta;

Figs. 9–16. Anomala species, protibiae. 9) A. coffea (male: holotype; female: paratype, Estación Pitilla, Costa Rica); 10) A. cyclops (male: holotype; female: paratype, Los Almendros, Costa Rica); 11) A. divisa (male: holotype; female: paratype, Estación Biológica Las Alturas, Costa Rica); 12) A. mersa (male: paratype, Sector Palo Verde, Costa Rica); 13) A. mesosticta (male: holotype; female: paratype, Rio Sardinas, Costa Rica); 14) A. robiginosa (male: holotype; female: paratype, Santa Rosa National Park, Costa Rica); 15) A. strigodermoides (male: holotype; female: paratype, Catarata río Buenavista, Alajuela); 16) A. unilineata (holotype). Scale bar = 1 mm.

Figs. 17–24. Anomala species, aedeagi, lateral view (top), dorsal view (bottom left), ventral view (bottom right). 17) A. coffea (paratype, Estación Pitilla, Costa Rica); 18) A. cyclops (holotype); 19) A. divisa (holotype); 20) A. mersa (holotype); 21) A. mesosticta (holotype); 22) A. robiginosa (paratype, Zarcero, Costa Rica); 23) A. strigodermoides (holotype); 24) A. unilineata (paratype, Santa Rosa National Park, Costa Rica). Scale bars = 1 mm.

Figs. 25–33. Anomala species, genitalia. Endophalli: 25) A. coffea (paratype, Estación Pitilla, Costa Rica); 26) A. cyclops (paratype, Finca Jenny, Costa Rica); 27) A. divisa (holotype); 28) A. mersa (paratype, Sector Palo Verde, Costa Rica); 29) A. mesosticta (holotype); 30) A. robiginosa (holotype); 31) A. strigodermoides (holotype); 32) A. unilineata (holotype). Aedeagus: 33) A. sticticoptera (lateral view, Cuyotenango, Guatemala, MNHUB). Scale bars = 1 mm.

Figs. 34–36. Anomala species, distribution maps. 34) Distribution of A. coffea, A. mersa, and A. robiginosa;