Compsodactylus scabrosus, Fuhrmann, Juares, 2012

Fuhrmann, Juares, 2012, Compsodactylus, a new South American genus with one new species and two new combinations (Coleoptera: Scarabaeidae: Melolonthinae), Zootaxa 3577 (1), pp. 43-57 : 47

Compsodactylus scabrosus new species

( Figs. 7–10 , 27 , 39 , 61 , 70, 71, 75 , 76 )

Diagnosis. Body fusiform in lateral view, without green reflections; clypeus with denticle-like setae; elytral striae distinctly punctate.

Description. Body ( Figs. 7–9 ) fusiform in dorsal and lateral view, length 6.3–6.5 mm, width 3.1–3.2 mm at the middle of elytra. Color of elytra dark brown, metatibia and metatarsus yellowish brown, pronotum sometimes with lateral yellowish brown coloration; or body yellowish brown with head and anterior area of pronotum dark brown. Head ( Fig. 10 ) width 1.3–1.4 mm. Width of eye in dorsal view about 7.2 times narrower than interocular area. Epistomal suture slightly sinuous. Frons and clypeus with denticle-like setae. Galea with 7 teeth ( Fig. 27 ). Pronotum length 1.8–1.9 mm, width 2.1–2.2 mm. Protarsal claws with anterior tooth narrower and longer than internal tooth. Scutellum as large as anterior elytral margin or near so. Elytral striae distinctly punctate. Posterior wing ( Fig. 61 ) with AP3+4 inconspicuous. Male and female metafemur slightly enlarged; male with some long, erect, setae. Parameres ( Figs. 70–71 ) with ventral side rounded. Female terminalia ( Fig. 75 ). Proctiger indistinct, paraprocts membranous, membranous lobe wide. Gonocoxite pieces connate; proximal piece large, smooth, glabrous; distal piece shorter; internal and apical margin setose.

Discussion. Compsodactylus scabrosus is similar to C. martinezi , but smaller and without metallic green reflections. Compsodactylus scabrosus and C. parvulus have similar size, gonocoxite pieces connate, gosnostyle absent; however, the gonocoxite distal piece in C. scabrosus is larger than in C. parvulus .

Distribution ( Fig. 76 ). The holotype and three paratypes of C. scabrosus were collected in Payogasta, Salta Province, Argentina; a municipality located in the northwestern Argentine Andes, with elevation higher than 2500 m. One female paratype was collected in Province of Tucuman, Argentina, in “ciudad” locality, which probably refers to San Miguel de Tucuman, about 430 m, on the slopes of Aconquija mountains, a southwest extension of Andes.

Etymology. Scabrosus (Latin) , rough, scabrous; in reference to the head and pronotum denticle-like ornamentation.

Type series. Holotype labels: [ ARGENTINA, SALTA | Payogasta iii.1992] [HOLOTYPE 3 | Compsodactylus | scabrosus | det. J. Fuhrmann, 2012] “red label”. Holotype without external damage and not dissected. Allotype and 2 male paratypes with identical labels. One female paratype with labels: [♀] [ Argentina | Tucuman | Ciudad xii.1948 | A. Martinez leg.] [Pereira] .

Material examined. ARGENTINA: SALTA, Payogasta , March 1992, 3 (holotype), ♀ (allotype), 2 3 (paratypes) ( UFMT); TUCUMÁN, “Ciudad” , December 1948, A. Martínez (collector), 1 ♀ (paratype) ( MZSP) .

Figures

FIGURE 76. Compsodactylus species geographic distribution.

FIGURES 1 – 9. 1, 2, 4, Compsodactylus martinezi male habitus (dorsal, lateral, head dorsolateral); 3, C. martinezi female habitus (lateral; arrow shows the posterior margin bordered); 5, 6, C. parvulus holotype female habitus (dorsal, lateral); 7, 8, C. scabrosus holotype male habitus (dorsal, lateral); 9, C. scabrosus female habitus (lateral).

FIGURES 10 – 16. 10, Compsodactylus scabrosus head (dorsal); 11, C. parvulus head (dorsal); 12 – 16, C. martinezi; 12, head (dorsal); 13, epipharynx with details; 14, antenna; 15, hypopharynx; 16, labium.

FIGURES 17 – 27. 17 – 26, Compsodactylus martinezi; 17 – 19, left mandible (dorsal, ventral, molar); 20 – 22, right mandible (dorsal, ventral, molar); 23 – 24 maxilla (dorsal, ventral); 25 – 26 galea (ventral, internal); 27, C. scabrosus galea (internal).

FIGURES 28 – 39. 28 – 35, 37, Compsodactylus martinezi; 28 – 30, prothorax (frontal, posterior, ventral); 31, detail of hypomeron posterior arm; 32, male protarsomere I (internal); 33, male protibia and protarsus; 34, male mesotibia and mesotarsus; 35, male metafemur, metatibia, and metatarsus; 36, C. parvulus female metaleg; 37, C. martinezi male tibial apex; 38, C. parvulus female tibial apex; 39, C. scabrosus male tibial apex.

FIGURES 52 – 62. 52 – 60, Compsodactylus martinezi; 52 – 53, wing (distended, folded); 54, wing articulation and base; 55 – 56, first axillary (dorsal, ventral); 57, head of first axillary (anterior); 58 – 59, second axillary (dorsal, ventral); 60, third axillary (dorsal); 61, C. scabrosus wing distended; 62, C. martinezi posterior view of elytral medial contact section. Ax 1, 2, 3, first, second, third axillary; HP, humeral plate; med, medial plate (with two pieces). Wing base and venal: prefix B, basivenalia; suffix A, anterior; suffix P, posterior; b, BMP-BCu brace; PC, precosta; C, costa; R, radius; M, media; Cu, cubitus; A anal; J, jugal. Wing fold (red): af, anal fold; jf, jugal fold; lf, longitudinal fold; mf, medial fold; tf, transversal fold. Other abbreviations on the last plate.

FIGURES 63 – 75. 63 – 69, Compsodactylus martinezi; 63, male genital ring; 64, aedeagus (lateral); 65, parameres (dorsal); 66, parameres (ventral); 67 – 69, endophallus (lateral), ventral basis detail, ornamentation detail; 70 – 71, C. scabrosus; 70, aedeagus (lateral); 71, parameres (dorsal); 72 – 73, C. martinezi; 72, female terminalia and internal associated region (ventral); 73, female external genitalia; 74, C. parvulus female external genitalia; 75, C. scabrosus female external genitalia. acg, accessory gland; bcx, bursa copulatrix; dgx, gonocoxite distal piece; gst, gonostylus; ovd, oviduct; pgx, gonocoxite proximal piece; ppt, paraproct; sga, spiculum gastrale caudal piece; sgc, spiculum gastrale caudal piece; spt, spermatecae; stg, spermatecae gland; ut 9, urosternite; tem, temones.