Embates rhombifer (Champion)

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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Embates rhombifer (Champion)


50. Embates rhombifer (Champion)

(Fig. 168–169, 248)

Ambates rhombifer Champion 1907: 159 . Lectotype male, here designated, Panama, labeled: “Type”, “ ♂ ”, “V. de Chiriqui / below 4000 ft ” (BMNH). Paralectotypes 2, here designated: Volcán (BMNH 2). Hustache 1938 (cat.); Blackwelder 1947 (cat.); O’Brien & Wibmer 1982 (cat.)

Embates [ rhombifer ]. Alonso­Zarazaga & Lyal 1999 (global combination of all species of Ambates Schönherr 1836 with Embates Chevrolat 1833 )

Redescription. Habitus: Fig. 168 and Fig. 30 View FIGURES 26–33 , total length 5.7–8.2 mm (m=6.8, n=20). Color: integument rufous­castaneous; basic vestiture of minute, translucent scales, scales yellow in broad dorsolateral and lateral pronotal vittae, compound elytral vitta and apical streak (Fig. 168a, b); venter with minute scales. Head: frontal fovea absent or obsolete, rostrum moderate, subcylindrical, sides attenuated between apex and antennal insertion, not costate dorsomedially, basolateral margin moderately edged, length of rostrum ♂♂ 1.22–1.42 x (m=1.32, n=12), ♀♀ 1.32–1.46 x (m=1.41, n=8) pronotal length, length of ante­antennal portion ♂♂ 0.42–0.46 x (m=0.44, n=12), ♀♀ 0.46–0.49 x (m=0.47, n=8) total rostral length, dorsal margin of antennal scrobe reaching rostral base before eye; funicular segment 2 little longer than 1, club oblong ovate (♀♀) to subcylindrical (♂♂). Pronotum: length 0.82–0.92 x (m=0.88, n=20) maximum width, sides rounded, widest in basal half, anterior portion tubulate; disk densely punctate, intervals rugose, subcostate dorsomedially or not. Elytra: length 2.00–2.14 x (m=2.07, n=20) width at humeri, width 1.18–1.29 x (m=1.24, n=20) maximum pronotal width, sides subparallel in basal half, apices rounded separately, preapical callus developed moderately, striae fine, punctures indistinct, interstriae flat, 9 subcostate distally. Legs: moderately stout, tibia slightly curved, ventral margin with distal cluster (♀♀) and indistinct fringe (♂♂) of cupreous hairs, tarsal claws arcuate and separate at base. Male: aedeagus as E. justini , apex less broadly rounded on average (Fig. 169).

Plant association. Piper arboreum (Prena 9).

Distribution. Costa Rica and Panama, Pacific side of Cordillera de Talamanca between 1200 and 1720 m (Fig. 248).

Material examined. COSTA RICA. Puntarenas: P.N. Amistad, Las Mellizas, 1300– 1440 m ( INBC 10 View Materials , JPPC 9 ) ; Sector Altamira , 1200 m ( INBC) ; Las Tablas , 1250 m ( INBC) . PANAMA. Chiriquí: Volcán de Chiriquí, 800–1300 m ( BMNH 3 ) ; Las Lagunas , 4 km W Hato del Volcán, 1360 m ( HPSC 10 , HAHC 12 , BMNH 2, TAMU, CWOB, CMNC) ; 2 km N Santa Clara , 1300 m ( HAHC) ; 2 km W Cerro Punta , 1720 m ( HAHC) . Total 53 specimens .

Discussion. Embates rhombifer belongs to a complex of slender, mostly South American species with more or less separately rounded elytral apices. The complex is represented in Middle America by E. justini , E. rhombifer , E. consimilis and E. rutilus . The first two species have separated claws and a short aedeagal flagellum with short basal appendage, while the latter two species have subconnate claws and a more elongate flagellum with projecting basal appendage. Embates rhombifer is another example for a spatially isolated population on the Pacific side of the Cordillera de Talamanca, that demonstrates close relationship to South American species.


Instituto Nacional de Biodiversidad (INBio)














Embates rhombifer (Champion)

Prena, Jens 2005

Ambates rhombifer

Champion, G. C. 1907: 159