Embates discissus Prena, 2005

Prena, Jens, 2005, The Middle American species of Embates Chevrolat (Coleoptera: Curculionidae: Baridinae), Zootaxa 1100 (1), pp. 1-151 : 1-151

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https://doi.org/ 10.11646/zootaxa.1100.1.1

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scientific name

Embates discissus Prena

sp. n.

47. Embates discissus Prena sp. n.

(Fig. 161, 256)

Holotype male (dissected), Panama, labeled: “ 3 mi W Cocoli / Panamá ”, C.Z. / 30 Aug. ‘74/ H.P. Stockwell ” ( CMNC).

Paratypes 7 (1 male, 6 females), Panama, labeled: “ Panamá: Canal Zone / Madden Forest Mi. 2.5/ 9° 05' N 79° 39' W ”, “12.viii.” ( CHAH); “ Fort San Lorenzo / Canal Zone / 9° 20' N 80° 0' W / 30 VI 73 Engleman ” ( CMNC, HPSC); “CANAL ZONE,/ Ft. Gulick, on/ weed, Aug. 1979 / H. J. Harlan ” ( CWOB); “Canal Zone,/ Pipeline Road/ May 12, 1978, CW&LB/ O’Brien & Marshall” ( CWOB); “ 7 km SE Gamboa / Panamá, C.Z./ 8 Oct. ‘80/ H.P. Stockwell ”, “ ♀ ” ( JPPC); “ R. Belzer / Cerro/ Campana/ May 24, 71” ( NMNH) GoogleMaps .

Description. Habitus: as Fig. 162, total length 9.3–10.2 mm (m=9.6, n=5). Color: integument piceous, almost black; basic vestiture of minute, yellow to cupreous scales; scales yellow in dorsolateral pronotal vitta, in compound post­humeral elytral vitta reaching metepisternum and flank of metasternum, and in oblique subapical elytral fascia (Fig. 161). Head: frontal fovea minute, rostrum moderate, subcylindrical (as Fig. 163), sides attenuated between apex and antennal insertion, subcostate dorsomedially (♂) or not (♀♀), basolateral margin moderately edged, length of rostrum ♂ 1.17 x (n=1), ♀♀ 1.17–1.32 x (n=4) pronotal length, length of ante­antennal portion ♂ 0.34 x (n=1), ♀♀ 0.36–0.38 x (m=0.37, n=4) total rostral length, dorsal margin of antennal scrobe reaching rostral base well before eye; funicular segment 2 distinctly longer than 1, club oblong ovate. Pronotum: length 0.84–0.87 x (m=0.85, n=5) maximum width, widest in basal third, then roundly narrowed, anterior portion tubulate; disk densely punctate, intervals slightly rugose, dorsomedially subcostate or not. Elytra: length 1.75–1.85 (m=1.83, n=5) width at humeri, width 1.15–1.24 (m=1.19, n=5) maximum pronotal width, sides subparallel in basal half, apices rounded conjointly, preapical callus weakly developed, striae fine, punctures distinct, interstriae flat, 9 convex to subcostate distally. Legs: rather stout, tibia nearly straight, ventral margin with distal cluster of cupreous hairs, tarsal claws arcuate and separate at base. Male: aedeagus as E. obliquus .

Plant association. Not known (probably large­leaved species of the P.imperiale group, with the shoot­apex emerging from within the leaf­base at flowering nodes).

Distribution. Central Panama (Fig. 256).

Specific epithet. The name is a Latin participle of discindo meaning separated or disconnected.

Discussion. Embates discissus is related very closely with A. albovittatus and A. championi . All specimens of the type series are larger than the A. albovittatus I have seen, and the post­ and ante­macular elements of the dorsolateral vestiture are separated consistently from each other. Slight differences are apparent also in the shape and sculpture of the rostrum.


Smithsonian Institution, National Museum of Natural History