Deltochilum (Aganhyboma) violaceum Paulian 1938

Silva, Fernando A. B., Louzada, Júlio & Vaz-De-Mello, Fernando, 2015, A revision of the Deltochilum subgenus Aganhyboma Kolbe, 1893 (Coleoptera: Scarabaeidae: Scarabaeinae), Zootaxa 3925 (4), pp. 451-504 : 464-465

publication ID	https://doi.org/ 10.11646/zootaxa.3925.4.1
publication LSID	lsid:zoobank.org:pub:69DADAD6-84DA-4CBE-B653-6527293BA560
DOI	https://doi.org/10.5281/zenodo.6115698
persistent identifier	https://treatment.plazi.org/id/03DE87D5-853F-FF8F-5991-FB845054FCC0
treatment provided by	Plazi
scientific name	Deltochilum (Aganhyboma) violaceum Paulian 1938
status

Treatment

Deltochilum (Aganhyboma) violaceum Paulian 1938 View in CoL

( Figs 70 View FIGURE 70 , 89 View FIGURES 89 – 92 , 97 View FIGURES 95 – 102 )

Deltochilum (Aganhyboma) violaceum Paulian 1938: 252 View in CoL , 253, Figs 7 View FIGURES 4 – 11 , 18 View FIGURES 12 – 19 (original description, taxonomic comments and identification key)

Vulcano & Pereira 1964: 642 (catalogue)

Vaz-de-Mello 2000: 192 (checklist)

Deltochilum violaceum: Blackwelder 1944: 203 View in CoL (checklist)

Description. Body. Completely green or blue, with weak or opaque sheen. Elytra a little darker than head and pronotum ( Fig. 97 View FIGURES 95 – 102 ). Ventral surface dark green. Length 15 mm. Head. Dorsal surface with dense punctures close, confluent on anterior and lateral portions. Punctures around clypeus larger and closer than those at center of dorsal interocular surface. Anterior margin of each puncture not defined (impressed). Margin between clypeal teeth and genae curved outward near clypeogenal suture. Thorax. Pronotum smooth, covered with small punctures, apparently simple and uniformly distributed. Punctures located on anterior angles larger, with a typical foveiform shape. Margin of pronotum (close to lateral angles) curved inward. Margin between lateral and posterior angles distinctly convex (curved outward). Posterior half of pronotum with rounded shape. Elytra. Slightly rugose due to small and shiny microtubercles along interstriae ( Fig. 70 View FIGURE 70 ). Lateral margins evenly curved outward ( Fig. 97 View FIGURES 95 – 102 ). Elytral striae narrow, with carinate margins close and almost touching. Punctures of elytral striae small and inconspicuous. Interstrial surface with small and dispersed punctures intermingled with dense microtubercles, some of which are confluent, shining and form an glossy zone ( Fig. 70 View FIGURE 70 ). Surface of second interstria more irregular than the others. Basal carina of seventh interstria prominent and short ( Fig. 97 View FIGURES 95 – 102 ). Length of apical carina of seventh interstria approximately two times that of apical carina of sixth interstria. Apical tubercle of second interstria present. Abdomen. Punctures large and conspicuous on lateral portions of ventrites, concentrated on anterior and posterior margins and reduced to a narrow belt along midline of abdomen. Pygidium with dense foveiform punctures over entire surface; punctures small, transverse, elliptical and almost confluent. Apex of pygidium rounded. Legs. Protibia sharply widened along inner margin from basal third to apex (as in Fig. 66). Middle protibial tooth closer to apical tooth than to basal tooth (as in Fig. 66). Apical third of metatibia strongly curved inward (as in Fig. 67). Inner margin of metatibia with a longitudinal row of small tubercles. Apex of metatibia with six clearly visible longitudinal carinae. Anterior margin of profemur effaced at middle portion. Foveiform punctures of profemur with transverse elliptical shape. Metatarsus with approximately one-half of metatibia length.

Material studied. Holotype ( MNHN) [examined]: BRAZIL (no locality given in original description). 1. [old white label, handwritten]. Brésil; 2. [old white label, printed and bordered in black]. Ex Musaeo/ E. Allard/ 1899; 3. [old white label, printed and bordered in black]. R. Paulian/ Vidit; 4. [old white label, handwritten]. D. violaceum n. sp. / Type.; 5. [red label, printed in black]. Holotype.

Non-type material [1]: BRAZIL: MINAS GERAIS: Águas Vermelhas, XII.1997, A. Bello & F. Z. Vaz-de- Mello (1 ♀ CEMT).

Sampling methods. millipede baited pitfall trap [1].

Habitat. Brazil (Minas Gerais) ( Fig. 89 View FIGURES 89 – 92 ), the single specimen with data was collected in “Carrasco”. This habitat consists of dense shrubby xerophilous vegetation that occurs in semi-arid domain of Brazil.

Diagnosis and remarks (within the trisignatum complex): This species can be confused with D. kolbei . However, D. violaceum can be easily distinguished by the following characters: elytra with dense and shiny microtubercles ( Fig. 70 View FIGURE 70 ); elytra opaque or with weak luster; apical tubercle of second interstria present.