Ptychoderes crustatus Frieser, 1988

Mermudes, José Ricardo M. & Napp, Dilma Solange, 2006, Revision and cladistic analysis of the genus: Ptychoderes Schoenherr, 1823 (Coleoptera, Anthribidae, Anthribinae, Ptychoderini), Zootaxa 1182 (1), pp. 1-130 : 24-26

Ptychoderes crustatus Frieser, 1988

Figs. 208 , 241 , 263

Ptychoderes crustatus Frieser, 1988: 233 ; Rheinheimer, 2004: 10 (cat.).

Male. Vestiture ( Fig. 208 ): pale dorsal vitta with dense whitish to clay­grayish scales, intermingled with light brown scales, decumbent and denser on rostrum, pronotum and elytral interstriae 1–2 and 4. Pygidium with predominance of brownish scales. Ventral body surface and legs with appressed, dense yellowish­white scales, longer, thicker, conspicuously denser on disk of ventrites II–IV. Sides of prosternum, below lateral carina, with a vitta of scales concolorous with those of pronotum. Sides of mesosternum with a narrow, glabrous vitta. Mesepimera, episterna and sides of metasternum with deep setigerous punctures, each provided with a brownish scale; these punctures shallow at sides of the ventrites. Outer surface of meso­ and metafemora with two spots of blackishbrown scales.

Rostrum 1.5 times as long as wide across base. Distance between scrobe and eyes about half maximum width of eye. Sides looking tricarinate due the careniform upper margin of scrobe; carinae short, oblique, lower carina slightly longer. Scrobes careniform at dorsal and basal margins; extension deep, narrow with a deep distal pit. Mentum sparsely, moderately finely punctate; strongly impressed at sides and shallowly grooved at apical margin. Gula with sparse, fine punctures. Frons with prominent carinae.

Antennae short ( Fig. 208 ), exceeding antebasal carinae of prothorax. Segment II thickened, slightly longer than III; III–IV subequal in length; V–VII subequal, shorter than III–IV; VIII half as long as IX; X slightly shorter than IX and half as long as XI. (II = 0.40; III = 0.30; IV = 0.30; V = 0.20; VI = 0.20; VII = 0.20; VIII = 0.15; IX = 0.30; X = 0.25; XI = 0.40).

Prothorax ( Figs. 208 , 241 ) slightly wider than long, almost rounded at sides, weakly converging anteriorly from antebasal carina, anterior margin conspicuously narrower. Pronotal depression deep, divided by a prominent, more or less transverse tubercle reaching lateral margins of depression. Rugae more prominent and elongate on median tubercle, less evident at sides near lateral carina, and poorly conspicuous or even missing inside depression. Antebasal carina interrupted at middle (at least twice width of carina), almost to barely oblique towards lateral carina. Lateral carina almost straight ( Figs. 208 , 241 ). Secondary carina almost straight, widely interrupted at middle, not reaching lateral carina. Laterobasal carina reaching posterior margin of prothorax. Prosternum almost flat, with dense, fine punctures intermingles with scarce, coarse, shallow punctures; antecoxal furrow shallow, sinuous, with a very small prosternal projection at middle. Mesosternum with moderately coarse, shallow, irregularly sparse punctures, and an irregular row of coarse punctures near the intercoxal process. Intercoxal process of mesosternum impressed apically, not swollen at lateral and apical margins, with evident lateroapical projections. Elytra 1.8 times longer than wide across humeri, subconvex, transversely depressed before middle; basal gibbosities large and prominent; surface rugose from base to behind middle, more so at base and near suture. Sides subparallel at basal half, slightly wider than humeri behind middle. Apex almost rounded without anteapical tubercles, interstriae not swollen. Wings without radial cell.

Abdomen. Ventrites short; ventrite I convex, sex patch absent; groove of the intercoxal process line shaped; disk of ventrites II–IV strongly depressed, clothed with dense, long, thickened pilosity. Ventrite V emarginate at apex. Pygidium longer than wide, depressed, with a short groove to fit elytra, rounded at apex.

Female. Rostrum shorter, almost as long as wide across base. Antennae shorter, exceeding the middle of prothorax; segment II longest; III–IV subequal; V–VIII decreasing in length; IX twice as long as VIII; XI one third longer than X. (II = 0.4; III = 0.3; IV = 0.3; V = 0.3; VI = 0.2; VII = 0.2; VIII = 0.2; IX = 0.4; X = 0.2; XI = 0.4). Ventrites weakly convex; II and III subequal in length; IV slightly shorter than III, both without long, thick pilosity; ventrite V truncate at apex. Pygidium wider than long, somewhat convex on disk, rounded­truncate at apex. Terminalia: tergite VIII as long as wide, feebly convergent apically, truncate at apex; sternite VIII feebly shorter than apodeme, truncate at apex. Ovipositor with four teeth: two distal, conchoidal, developed and similarly sized; one proximal, dorsolateral, moderately developed, and one proximal, ventrolateral, minute; median rods thickened, rounded at proximal margin; median ventral lobe bilobated; bursa copulatrix lacking ventral lobe.

Measurements, in mm, male/female, respectively. TL = 7.4/10.5–11.3; RL = 1.4/ 1.4–1.5; RAW = 1.4/1.3–1.7; RBW = 0.9/1.3–1.4; HW = 1.2/1.8–2.0; DSO = 0.4/0.4; MLO = 0.8/1.0; PL = 2.2/2.7–3.2; PW = 2.4/2.7–3.2; EL = 4.6/6.8–6.9; EW = 2.5/3.3–3.5. Type material

Female paratype ( ZSMA), examined, labelled as follows: 1) Ptychoderes crustatus sp. n., Paratype, [red]; 2) det. R. Frieser , 1987 [pink]; 3) Guyane Française, Février, 1983, G. Tavakilian leg. [white]; 4) Route de Kaw , PK 33 [white]; 5) Zool. Staatsslg., München [blue]. Male holotype, not examined, deposited in the MNHN ( Frieser, 1988). Type locality: French Guiana .

Remarks

P. crustatus is the sister group of the clade P. brevis + P. jekeli by the synapomorphies: sides of prosternum with a vitta of scales concolorous with those of pronotum (4 3); elytra transversely impressed before middle (29 1); and pygidium elongate, depressed, weakly convergent at sides (32 1). P. crustatus differs from P. brevis and P. jekeli , by the vestiture with whitish and light­brown scales, almost rounded prothorax, and prosternal furrow shallow and sinuous. In P. brevis and P. jekeli , the vestiture is formed by green and whitish scales, the prothorax weakly convergent apically from the antebasal carina, and the prosternal furrow deep and straight. In addition, the males of P. crustatus have the disk of ventrites II–IV strongly depressed, with long, dense, thick hairs, autapomorphy of this species.

Distribution ( Fig. 263 ) FRENCH GUIANA and BRAZIL (Mato Grosso).

Material examined

FRENCH GUIANA. Cayenne ( Route de Kaw , 33 Km), 1 M, IV .1993, Marek­Seidl leg. ( CPMT) . BRAZIL. Mato Grosso: Sinop (Faz. Teles), 1 F, X.1974, Silva leg. ( MNRJ) .

Figures

FIGURES 208–214. 208, Ptychoderes crustatus Frieser, 1988, male; 209, Ptychoderes brevis Jordan, 1894, female holotype; 210, Ptychoderes jekeli Mermudes & Napp, 2004, female holotype; 211, Ptychoderes longicollis Jordan, 1894, male. 212–214, Ptychoderes jordani Frieser, 1959. 212, male holotype; 213, female paratype; 214, pale form, male.

FIGURES 239–250. Pronotum. 239, Tribotropis prasinata; 240, Unanthribus grandis; 241, Ptychoderes crustatus; 242, P. brevis, female holotype; 243, P. longicollis, holotype; 244, P. jordani, male holotype; 245, P. magnus, male holotype; 246, P. depressus; 247, P. virgatus; 248, P. bivittatus, male syntype; 249, P.rugicollis; 250, P. elongatus.

FIGURES 263–264. 263. Geographical distribution of P. longicollis (black circles), P. crustatus (white triangles), P. brevis (black squares), P. jekeli (black triangles). 264. Geographical distribution of P. jordani (black squares), P.depressus (black triangles), P. virgatus (white circles).