Deltochilum (Aganhyboma) viridicatum Silva, Louzada & Vaz-De-Mello, 2015, new species
Creators: name: Silva, Fernando A. B.
name: Louzada, Júlio
name: Vaz-De-Mello, Fernando
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Deltochilum
Deltochilum viridicatum

description: Deltochilum (Aganhyboma) viridicatum new species
(Figs 7, 34, 90, 104, 105)
Pereira & Martínez 1956: 93 (comment on predation of Diplopoda; referred as D. kolbei “misidentification”) Martínez 1959: 52 (catalogue; cites Pereira & Martínez 1956)
Halffter 1959: 166 (comment on predation of Diplopoda; cites Pereira & Martínez 1956) Halffter & Matthews 1966: 42 (comment on predation of Diplopoda; cites Pereira & Martínez 1956) Cano 1998: 176 (cites Pereira & Martínez 1956)
Etymology. The green body color inspired the species name.
Description. Body. Head dark green or black-violaceous, with weak sheen or opaque, pronotum dark brown, with dark green spots, elytra dark green (Fig. 104). Ventral surface dark green, with a smooth metallic sheen. Length 13 to 14 mm. Head. Surface with dense foveiform punctures, not confluent, separated at center of dorsal interocular surface by approximately one or two times their diameters. Punctures of variable size; largest around eyes and smallest closer to clypeus. Anterior margin of each puncture not defined (as in Fig. 60). Margin between clypeal teeth and genae curved outward approximately at halfway of its length. Thorax. Surface of pronotum with small punctures, apparently simple and uniformly distributed. Punctures located on anterior angles larger, with a typical foveiform shape. Pronotum with a narrow greenish band extending the entire edge (Fig. 104). Margin of pronotum (close to lateral angles) straight and emarginated, without depression. Margin between lateral and posterior angles approximately straight. Elytra. Slightly elongate (Figs 104, 105). Striae well impressed and punctate. Interstrial surface with small, dispersed foveiform punctures, amid small bright ocellate punctures, randomly distributed. First interstria brighter than rest of elytra. Basal carina of seventh interstria prominent and elongate, extending a little further than humeral callus portion (as in Fig. 71). Length of apical carina of seventh interstria not surpassing three times that of apical carina of sixth interstria. Abdomen. Punctures large and conspicuous, concentrated anterolaterally on each sternite, reduced to a narrow belt along midline of abdomen (as in Fig. 73). Pygidium with foveiform punctures denser on medial portion, near the base. Apex of pygidium weakly acuminate or rounded. Legs. Protibia not abruptly widened. Middle protibial tooth equidistant between apical and basal teeth. Protibial spur acuminate at apex. Apical third of metatibia only slightly curved inward (as in Fig. 68), with five clearly visible longitudinal carinae. Inner margin of metatibia without longitudinal row of small tubercles. Anterior edge of profemur completely emarginate, with abundant setae in two-thirds of its length. Foveiform punctures of profemur with transverse elliptical shape. Metatarsus longer than two-thirds of metatibia length. Secondary sexual characters. Male abdomen more longitudinally flattened than that of female. Males may possess medially between first and second ventrites, a small tubercle. Apical margin of pygidium longer in male. Protibial spur more acuminate in female.
Material studied. Holotype: ARGENTINA: MISIONES: San Pedro, I. 1956 (1 ♂ CEMT).
Paratypes [7]: ARGENTINA: MISIONES: Loreto, 1955, F. H. Walz (1 ♀ MZUSP); Loreto, XI.1958, Martínez (1 ♀ CEMT); Loreto, A. Ogloblin (1 ♂ MZUSP); [no indication of city], II.1954, F. H. Walz (1 ♂ CMN). BRAZIL: RIO GRANDE DO SUL: Neu Wurttemberg [currently Panambi], 1915, E. Garbe (1 ♂ MZUSP); Guaíba, 1976, M.H. Galileo (1 ♀ CEMT). URUGUAY [doubtful]: Puntas, Arenal (1 ♂ MZUSP).
Habitat. Argentina, southern Brazil and Uruguay [doubtful] (Fig. 90). Only one specimen with label data " Mata de galeria" [riparian forest].
Diagnosis and remarks (within the cupreicolle complex): head dark green or black-violaceous, with a weak sheen or opaque; apex of pygidium weakly acuminate or rounded; basal carina of seventh interstria prominent and elongate, extending a little further than humeral callus portion (as in Fig. 71), though somewhat shorter and inconspicuous on the basis than in D. viridescens. The following aedeagus characters are also diagnostic: parameres shorter than phallobase, rounded at apex, in lateral view forming an angle of approximately 30° with phallobase (Fig. 7); parameres more enlarged at the base in lateral view (Fig. 7) than in D. viridescens. Lamella copulatrix (LC): left lobe “J”-shaped (Fig. 34); right lobe with shape similar to a human leg (Fig. 34). Frontolateral peripheral sclerite (FLP) darkly sclerotized (as in Fig. 51). Center of genital segment with two wellsclerotized portions with oval shape.
We examined a specimen with label data "Puntas, Arenal" and we believe this location is Puntas del Arenal, Uruguay. This specimen is black (Fig. 105), and the foveiform punctures on central portion of head are extremely close.
The species can show other variations in pattern of colors. Pronotum of some individuals can vary between dark and light brown or reddish. Elytra can vary between dark green and black. Ventral surface may also vary from dark green and black.
description: Published as part of Silva, Fernando A. B., Louzada, Júlio & Vaz-De-Mello, Fernando, 2015, A revision of the Deltochilum subgenus Aganhyboma Kolbe, 1893 (Coleoptera: Scarabaeidae: Scarabaeinae), pp. 451-504 in Zootaxa 3925 (4) on pages 469-470, DOI: 10.11646/zootaxa.3925.4.1, http://zenodo.org/record/244795