Embates bisignatus (Chevrolat)

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 bisignatus (Chevrolat)


4. Embates bisignatus (Chevrolat)

(Fig. 41, 244)

Ambates bisignatus Chevrolat 1877: 341 . Holotype female, Mexico, labeled: “ Paratypus ”, “ Ambates / bisignatus Chevr. / Prena det. 1996”, green label at bottom of box “ Mexico Corina/ D. Sallé“ (NHRS). Champion 1907: 165; Hustache 1938 (cat., Batames to subgenus); O’Brien & Wibmer 1982 (cat.)

Batames bisignatus (Champion) . Casey 1922: 4

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

Redescription. Habitus: Fig. 41, total length 4.5–5.3 mm (m=5.0, n=13). Color: integu­ ment piceous, legs partially rufous; basic vestiture of beige and brown scales, scales black in elytral macula between interstriae 2–5 (Fig. 41), scales yellow in thin dorsolateral pronotal vitta and in variously developed post­macular fascia; venter with spot of yellow scales in ante­coxal portion of prosternum, vestiture sparse elsewhere. Head: frontal fovea absent, rostrum thick, falciform (as Fig. 45), costate dorsomedially and rugose laterally, basolateral margin strongly produced, length of rostrum ♂♂ 1.29–1.37 x (m=1.35, n=9), ♀♀ 1.31–1.40 x (m=1.36, n=4) pronotal length, length of ante­antennal portion ♂♂ 0.31– 0.35 x (m=0.33, n=9), ♀♀ 0.34–0.37 x (m=0.36, n=4) total rostral length, dorsal margin of antennal scrobe reaching rostral base well before eye; length of funicular segments 1 and 2 subequal, club oblong ovate (♀♀) to subcylindrical (♂♂). Pronotum: length 0.74–0.83 x (m=0.80, n=13) maximum width, greatest width near base, sides gradually converging in basal half, anterior portion roundly narrowed and tubulate in front; disk densely punctate, intervals granulose to rugose. Elytra: length 1.49–1.56 x (m=1.53, n=13) width at humeri, width 1.43–1.52 x (m=1.47, n=13) maximum pronotal width, sides gradually converging in basal half, apices rounded conjointly, preapical callus developed moderately, striae fine, punctures distinct, interstriae flat, 9 costate, 7 and 8 subcostate. Legs: tibiae curved and parallel­sided, distally with cluster of yellow hairs, tarsal claws arcuate and separate at base. Male: aedeagus as E. rugosus .

Plant association. Not known.

Distribution. Atlantic side of southern Mexico (Fig. 244).

Material examined. MEXICO. Without site: ( NHRS, SNSD 2 ) . Chiapas: 3 mi S Solusuchiapa ( TAMU) ; 7.4 km N Bochil ( CWOB) . Puebla: 15.5 mi S Tenampulco ( RDCC 2 , JPPC) . Queretaro: El Lobo to Río Tarcuilin , 1100 m ( CWOB) . Tabasco: Teapa ( BMNH, NMNH 2 View Materials , ZMHB 2 ) . Veracruz: Córdoba ( BMNH, NMNH) ; Lake Catemaco ( CNCI) ; Los Tuxtlas ( CMNC 2 , CWOB 2 , JPPC) ; San Andrés Tuxtla (BMNH); La Palma (CNMC); Tebanca (CWOB); Orizaba (NHMW); Tuxpan? [labeled Toxpam] (BMNH); Corinto? [labeled Corina] (NHRS). Total 28 specimens.

Note. The single specimen of E. bisignatus in the Chevrolat Collection (NHRS) has no label attached (except a paratype label) and is pinned next to a green bottom label with handwritten text. I believe, that this is the type specimen of Ambates bisignatus , because Champion (1907, p.165) gave no collecting site for the type but did so for all other specimens.

Discussion. Embates bisignatus is a close relative of E. solani , from which it can be distinguished by less elongate elytral maculae and usually parallel­sided tibiae.


Swedish Museum of Natural History, Entomology Collections


Smithsonian Institution, National Museum of Natural History


Canadian National Collection Insects














Embates bisignatus (Chevrolat)

Prena, Jens 2005

Batames bisignatus (Champion)

Casey, T. L. 1922: 4

Ambates bisignatus

Champion, G. C. 1907: 165
Chevrolat, A. 1877: 341