Anomala megaparamera Filippini , Micó

Filippini, Valentina, Micó, Estefania & Galante, Eduardo, 2013, Redescription of Anomala eucoma Bates, 1888 and a description of three new species from Costa Rica (Coleoptera: Scarabaeidae: Rutelinae), Zootaxa 3670 (2), pp. 255-273 : 266-268

Anomala megaparamera Filippini, Micó , & Galante, new species

Fig. 4

Material examined. Holotype: ɞ "Est. Cuatro Esquinas, P. N. Tortuguero, 0 m, Prov. Limon, COSTA RICA, R. Delgado, Oct 1990, L- N 280000_590500 / COSTA RICA INBIOCRI000285104" ( INBIO).

Paratypes (6): 1ɞ "Est. Cuatro Esquinas, 0m, P. N. Tortuguero, Prov. Limon, COSTA RICA. E. Quesada, Jun 1990, L- N 280000_590500 / CEUA 00105268"; 1ɞ "Cerro Tortuguero, 0–120m P. N. Tortuguero, Prov. Limon, COSTA RICA, R. Delgado, Feb 1992, L- N 285000_588000 / COSTA RICA INBIOCRI000552532"; 1ɞ "Est. Cuatro Esquinas, P. N. Tortuguero, 0m, Prov. Limon, COSTA RICA, E. Quesada, Jul 1990, L- N 280000_590500 / COSTA RICA INBIOCRI000670946"; 1ɞ "Cuatro Esquinas, P. N. Tortuguero, Prov. Limon, COSTA RICA. 0m. 26 Aug–6 Set 1989, J. Solano, L N 280000_590500 / COSTA RICA INBIOCRI000020633"; 1Ƥ "Cuatro Esquinas, P. N. Tortuguero, Prov. Limon, COSTA RICA. 0m, Set 1989. J. Solano, L N 280000_590500 / COSTA RICA INBIOCRI000086333"; 1Ƥ "Est. Cuatro Esquinas, P. N. Tortuguero, 0m, Prov. Limon, COSTA RICA, U. Chavarria, Jul 1990, L- N 280000_590500 / CEUA 00105269".

Description. Male. Body shape oval. Length 9.03 mm. Width 5.10 mm. Head, pronotum, and scutellum dark reddish brown. Pygidium, legs, and underside reddish brown; elytra light brown with two dark reddish brown horizontal bands, one median and one covering the bottom third. Surface covered with fine, blonde setae.

Clypeus trapezoidal, densely and deeply punctate, with rather coarse punctures; ratio width/length 2.21. Anterior angles rounded. Frons deeply punctate, with a shallow central depression and apparent boundary with vertex. Ocular canthum long, thin, and rounded at apex. Interocular ratio (interocular width/width of eye): 2.93. Antenna: ratio funiculus/club 0.62.

Pronotum trapezoidal, width 1.67 times length. Lateral margins form an obtuse and protruding angle at 1/3 of pronotum length, with width of pronotum at this level being slightly greater than at base. Anterior angles right and sharp, posterior angles obtuse and rounded. Basal margin thin and complete, sinuate. Whole surface with deep, large, and confluent punctures with sulcus not reaching hind margin. Surface with shallow wrinkles due to confluence of punctures.

Scutellum subpentagonal in shape, with rounded sides and blunt apex. Ratio width/length 1.30. Coarsely punctate.

Elytra with irregular striae. Subsutural interstice with 2 irregular rows of often confluent punctures, following interstices with irregular secondary striae; costae 2–6 not conspicuous. Setigerous punctures coincide with striae punctures, consequently the setae are not very dense. Lateral margin convex, larger at base, disappearing on apex. Marginal membrane almost complete.

Pygidium finely granulate, with longer setae at hind margins. Triangular in shape. Slightly convex in lateral view. Metasternal disc slightly sulcated, covered with sparse setae on the entire surface. Space between the mesocoxae narrow, slightly convex; width 0.21 mm. Mesometasternal suture well defined, at base of mesocoxae.

Abdominal sternites with 2–3 transverse rows of setae in the middle, and denser setae at sides. Punctures large and oval, sometimes fusing in diagonal streaks. Last sternite strigate-imbricate, with apical margin well defined and slightly sinuate.

Protibia with 2 teeth ( Fig.9 ): apical tooth long and almost straight; second tooth at the same level of internal apex of protibia, triangular in shape, obtuse. Metatibia stout, narrower subapically. First carina well developed. Surface rugose.

Protarsal claws: external claw strongly curved; internal claw bifurcate, with upper branch slightly shorter and half as wide as the lower one. Inferior margin sinuate.

Aedeagus ( Figs. 20–22 ) with very wide parameres, and proportionally shorter tectum. Endophallus ( Fig. 31 ) composed of a long ventral sacculus covered with sclerotized setae and a median posterior inflation; on the opposite side, 2 frontal inflations and 2 dorsal diverticles; gonopore situated dorsally between one inflation and diverticles (ejaculatory duct partially everted in illustration).

Female: similar to males, but the antennal club is shorter than in males. Pronotum usually wider than in males. Apical tooth of protibia ( Fig.9 ) wider and longer than in males; second tooth above internal apex. Upper branch of the internal protarsal claw half the width of the lower one, inferior margin straight. Metatibia stouter than in males. Last abdominal sternite with curved margin.

Variation. Second tooth of protibia at the same level or slightly superior in relation to the internal apex of protibia. Body length 9.02–10.14 mm, body width 5.10–6.18 mm. Clypeus w/l: 1.92–2.21. Interocular ratio (interocular width/width of eye): 2.93–3.52. Antenna: ratio funiculus/club 0.62–0.73. Pronotum w/l: 1.63–1.68. Scutellum w/l: 1.30–1.59. Pygidium w/l: 2.10–2.20. Width between mesocoxae: 0.21–0.25 mm. Metatibia w/l: 2.96–3.07. External claw l/h: 1.43.

Diagnosis. Anomala megaparamera is separated from similar species by the combination of the following characters: small size (8–10 mm); presence of depression in frons and irregular wrinkles on pronotum; pronotum wider at 1/3 of length than at base; metatibia surface rugose; parameres nearly as wide as tectum length, and similarly long; endophallus with additional inflations and diverticles.

Similar to the Osa and Guanacaste populations of A. eucoma , much smaller than the other species described here, it can be distinguished by the larger and coarser punctation on head, elytra, and sternites; the presence of depressions in frons and pronotum; much wider and longer parameres, and more complex and setose endophallus.

Distribution. Costa Rica, Parque Nacional Tortuguero ( Fig. 35 ).

Etymology. From Greek mega "big" and paramere, referring to the large proportions of parameres in relation to size of aedeagus.

Figures

FIGURE 35. Distribution of Anomala megaparamera.

FIGURES 2 – 5. Habitus images. 2: Anomala eucoma (paralectotype, Las Mercedes, Guatemala). 3: A. flavaeucoma (female paratype, Estación Hitoy Cerere, Costa Rica). 4. A. megaparamera (holotype). 5: A. pseudoeucoma (holotype). Scale = 5 mm.

FIGURES 7 – 10. Shape of protibia in 7: Anomala eucoma (paralectotype, Las Mercedes, Guatemala); 8: A. flavacoma (3 holotype, Ƥ Hitoy Cerere, Costa Rica); 9: A. megaparamera (3 holotype, Ƥ paratype, Cuatro Esquinas, Costa Rica); 10: A. pseudoeucoma (3 holotype, Ƥ paratype, Reserva de San Ramón, Costa Rica). Scale = 1 mm.

FIGURES 11 – 25. 11 – 16. Aedeagus of A. eucoma (paralectotype, Las Mercedes, Guatemala). 11: Dorsal aspect. 12: Ventral aspect. 13: Lateral aspect; a: dorsal section: part of the dorsal margin that corresponds to the joint between the two parameres; b: dorsal margin: margin of the paramere dorsal with respect to apex; conversely, the ventral part is the ventral margin, which in these species can be divided in c: posterior ventral margin; and d: anterior ventral margin, in relation to the angle formed by the curvature of the margin. Parameres of Costa Rican specimens showing slight variation among populations. 14: San José, Universidad de Costa Rica. 15: Estación Las Pailas, Guanacaste. 16: Estación Sirena, Parque Nacional Corcovado. 17 – 19. Aedeagus of Anomala flavacoma (paratype, Estación Cabro Muco, Costa Rica). 17: Dorsal aspect. 18: Ventral aspect. 19: Lateral aspect. 20 – 22. Aedeagus of Anomala megaparamera (holotype). 20: Dorsal aspect. 21: Ventral aspect. 22: Lateral aspect. 23 – 25. Aedeagus of Anomala pseudoeucoma (paratype, Hitoy Cerere, Costa Rica). 23: Dorsal aspect. 24: Ventral aspect. 25: Lateral aspect. Scale = 1 mm.

FIGURES 26 – 32. 26 – 29. Endophallus of Anomala eucoma showing variation among populations. 26: Paralectotype, Las Mercedes, Guatemala. 27: San José, Universidad de Costa Rica, Costa Rica. 28: Estación Las Pailas, Guanacaste, Costa Rica. 29: Estación Sirena, Parque Nacional Corcovado, Costa Rica. 30. Endophallus of Anomala flavacoma (holotype). 31. Endophallus of Anomala megaparamera (holotype). 32. Endophallus of Anomala pseudoeucoma (holotype). Scale = 1 mm. The arrows show the position of the gonopore.