Embates discordabilis Prena, 2005

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

26. Embates discordabilis Prena sp. n.

(Fig. 105–108, 254)

Ambates sp. 8 . Marquis 1991: 200

Holotype male (dissected), Costa Rica , labeled: “ COSTA RICA: Prov. Heredia:/ 10km SE La Virgen, 450–/ 550m, 10°20'N 84°05'W / 8.­ 13.4.2003 / INBio­OET­ALAS transect”, “handcollecting/ leg. Jens Prena ”, INB0003230077 ( INBC).

Paratypes 113 (60 males, 53 females), labeled: same label as holotype except 1.3.2000 ( JPPC 3), 17.­ 23.2.2003, INB0003229773–75 ( INBC 3); “ COSTA RICA: Prov. Heredia:/ 12km SE La Virgen, 550–/ 650m, 10°19'N 84°05'W / Prena, 15.III.2001 / INBio­OET­ ALAS transect” ( INBC, JPPC); “ COSTA RICA, Pr. Heredia / Pto.Viejo­La Selva B.S./ No. 402 21­V 1981 / R.J. Marquis coll.”, “ Piper sancti­felicis ”; same labels with following identifiers, collecting dates, plants: 427, 29.5.81, P. sancti­felicis I; 121, 19.10.80, P. sancti­felicis II ; 650, 31.10.81, P. sancti­felicis II ; 689, 24.11.81, P. sancti­felicis II ; 687, 24.11.81, P. sancti­felicis I; 579, 17.10.81, P. sancti­felicis I; 537, 7.10.81, P. sancti­felicis I ( NMNH 8); “ COSTA RICA / Pr. Heredia / Puerto Viejo/ Finca La Selva”, “R.J. Marquis, coll./ No. 948 28.IV.1982 ”, “ Piper sancti­felicis I”; same labels with following identifiers, collecting dates: 882, 6.4.82; 948, 27.4.82; 948, 8.5.82 ( NMNH 4); “ COSTA RICA. Prov./ Heredia F. La Selva/ 3 km S Pto. Viejo/ 10° 26' N 84° 01' W ”, “ 16.iii.1983 / H.A. Hespenheide” ( CHAH); “ COSTA RICA. Prov./ Heredia F. La Selva/ 3 km S Pto. Viejo/ 10° 26' N 84° 01' W ”, “ 4.iv.1983 / H.A. Hespenheide” ( CHAH); “ COSTA RICA. Heredia / 10 km W. Puerto Viejo/ 170 m. 4.III.1991 / H. & A. Howden” ( HAHC); “ COSTA RICA, Her.,/ Biol. Sta. La Selva, 50m,/ STR Trail, IX­1­1998,/ C.W. & L.B. O’Brien” ( CWOB 2); “ Costa Rica, HEREDIA: 3/ km S Puerto Viejo, Est./ Biol. La Selva, 100 m,/ 19.– 22.2.2000, leg. Prena” ( JPPC 25); “ COSTA RICA, Heredia:/ La Selva Biol. Sta./ 3 km S Pto. Viejo, 100m / 10°26'N 84°01'W ”, “ 16.III.2001 / leg. J. Prena” ( JPPC 2); same labels with following dates: 4 x 18.3.2001, 6 x 7.4.2001, 16.4.2001, 20.4.2001 ( JPPC 13, SNSD); “ COSTA RICA / La Virgen del/ Seguro/ Prov. Heredia ”, “R.J. Marquis coll./ No. 945 7­V­1982 ”, “ Piper bisasperatum ”; same labels with following identifiers, dates, plants: 1011, 10.6.1982, –; 2 x 941, 8.5.1982, P. epigynium ( NMNH 4); “ COSTA RICA Here./ Prov., Sarapiqui/ Dist., Chilamate,/ Selva Verde Lod./ II­13/17­1990,/ 50 m., Rifkind & Gum” ( CMNC); “ COSTA RICA / F. NEVERMANN/ I X 35”, “GUAPILES/ Sta Clara/ 250–300 m ” ( NMNH); “C.R. Alajuela / Peñas Blancas/ 9.V.1987 / E. Cruz MT” ( HAHC); “ Alajuela / Upala, Faidas/ N.E.V. Tenorio/ 700 m, 19 Ab 1988/ Gonzalez/ Soto, Ureña” ( MUCR); “Est. San Ramón Oeste. Prov. Alaju, COSTA/ RICA. 620 m. 3–19 Abr 1994. F. Quesada,/ L N 318100_381900 #2817”, CRI001 777234 ( INBC); “Sect. San Ramon de Dos Rios, Prov./ Alaju,/ COSTA RICA. 620m. 3–24 ABR/ 1995. M. Chinchilla,/ L N 318100 381900 #5328”, CRI002 250589 ( INBC); “Sect. San Ramón de Dos Rios, Prov./ Alaju, COSTA RICA, 620m. 18/ MAR–13 ABR 1995. F. A. Quesada,/ L_N_318100_381900 #5274”, CRI002 247014 ( INBC); “ COSTA RICA, Alajuela: R. B./ A. Brenes, Rio San Lorencito,/ 900m, 10°13'N 84°39'W,/ 4–6.iv.2003, leg. J. Prena” ( JPPC 5); “ COSTA RICA. Cart.­/ Limon border. 500m / 40 km NE Turrialba/ 18 May 1979 / H & A Howden” ( HAHC 2); “ Costa Rica, CARTAGO:/ 17 km SE Cartago, P.N./ Tapantí, 1200 m,/ 7/ 8.4.2000, leg. Prena” ( JPPC 3); “Rio San Lorenzo, 1050m,/ Tierras Morenas, Z.P./ Tenorio, Prov. Guanacaste / Costa Rica. A.Marin/ 23 mar a 21 abr 1992 / L­N 287800, 427600”, CRI000 413279, CRI000 413214 ( INBC 2); “Sector Cocori, 30 km al N. de Cariari/ Prov. Limón, COSTA RICA, 100m. Dic/ 1993. E. Rojas,/ L N 286000_567500 #2495”, CRI001 647576 ( INBC); “Sector Cerro Cocori, Fca./ de E. Rojas, 150 m, Prov./ Limon, Costa Rica, 26 jun/ a 16 jul 1992, E. Rojas/ L­N 286000, 567500”, CRI000 702971 ( INBC); “Sector Cerro Cocori, Finca de E. Rojas,/ Prov. Limón, COSTA RICA. 150m. Set/ 1993. E. Rojas,/ L N 286000_567500 #2347”, CRI001 142512, CRI001 142513, CRI001 142540 ( INBC 3); “ COSTA RICA. Limón P./ Valle de la Estrella/ Pandora. 17–20 Feb.1984 / H & A Howden ( HAHC 2); “ COSTA RICA, Limón: Hitoy/ Cerere Biol. Res., Valle de la/ Estrella, 300m, 21.–29.i.1996,/ leg. J. Prena” ( JPPC 3); “ COSTA RICA. Punt./ Monteverde Reserve/ 1500 m 24.V.1979 / H & A Howden” ( HAHC); “ Panamá: Panamá Pr./ Cerro Campana, 850m / 8°40'N, 79°56'W / 30 May ‘70 H.Stockwell” ( HPSC), same label except “12 Mar. ‘72 Stockwell” ( HPSC), 29 May ‘ 72 W. Bivin” ( NMNH 2); “PAN­ AMA, Pan.2700'/ Cerro Campana/ May 23,197 8 CW&LB/ O’Brien & Marshall” ( CWOB); “ PANAMA / Cerro Campana/ 12 June, 1975”, “Henk & Wim Wolda/ & Miguel Estribi” ( CWOB); “ PANAMA. Chiriqui Pr./ Mina Cerro Colorado/ 8° 33'N, 81° 49'W./ Elev. 1600 m./ 3 Aug 93 H. Stockwell” ( HPSC 2); “ PANAMA, Chiriquí: Res./ La Fortuna, 1100 m,/ 8° 44'N 82° 14'W ”, “Queb. Aleman/ 4.7.1995 ” ( FAUP); “ PANAMA, Chiriquí: Res./ La Fortuna, 1100 m,/ 8° 44'N 82° 14'W ”, “Camino IRHE/ 22.7.1995 ” ( FAUP); “ PANAMA, Chiriqui,/ Trail Fortuna to/ Soledad, S­facing/ slope May 20, 1978 ”, “C.W. &

L.B. O’Brien / & G.B. Marshall ( CWOB) ; ” PANAMA, Chiriqui / Fortuna , 82° 15'W / 8° 44'N, May 16, 1978 / O’Brien & Marshall ( CWOB) ; “ PANAMA, Chiriquí: Res. / La Fortuna , 1100 m,/ 8° 44'N 82° 14'W,/ 21.– 25.3.2001, lg. Prena” ( JPPC) ; “ PANAMA, Bocas del Toro:/ 15 km SSW Changinola ,/ 300 m, 9° 21'N 82° 36'W / 30.3.– 4.4.2001, lg. Prena” ( JPPC) .

Description. Habitus: Fig. 105, total length 3.2–5.3 mm (m=4.3, n=84). Color: integument piceous, basic vestiture of brown and some scattered yellow scales; yellow scales condensed in dorsolateral pronotal and elytral vittae, distal portion occasionally modified to oblique subapical fascia (Fig. 105). Head: frontal fovea minute or absent, rostrum moderately stout, subcylindrical, costate dorsomedially, basolateral margin edged, length of rostrum ♂♂ 1.03–1.24 x (m=1.13, n=40), ♀♀ 1.08–1.32 x (m=1.19, n=44) pronotal length, length of ante­antennal portion ♂♂ 0.35–0.44 x (m=0.40, n=39), ♀♀ 0.40–0.47 x (m=0.43, n=43) total rostral length, dorsal margin of antennal scrobe reaching rostral base before eye; length of funicular segments 1 and 2 subequal, club oblong ovate (female) or subcylindrical (male, Fig. 106). Pronotum: length 0.79–0.96 x (m=0.89, n=83) maximum width, sides subparallel or slightly rounded in basal half, apical portion rather strongly narrowed and tubulate in front; punctation dense and shallow. Elytra: length 1.75–1.96 x (m=1.86, n=83) width at humeri, width 1.22–1.50 x (m=1.30, n=83) maximum pronotal width, sides subparallel in basal half (sometimes slightly diverging), then increasingly narrowed toward apex, apices rounded conjointly, preapical callus moderate, striae fine, punctures indistinct, interstriae flat, 9 costate distally. Legs: tibiae nearly straight, ventral margin not sinuate (Fig. 107), ventrodistally with cluster or indistinct fringe of cupreous hairs, tarsal claws arcuate and separate at base. Male: apex of aedeagus blunt, middle sclerotized, anterolateral portion membranous (similar to Fig. 115), body of aedeagus short, basal third angular in lateral view, apodemes approximately 4.0 x longer than body of aedeagus, flagellum very thin, longer than aedeagus including apodemes, transition to curved base gradual, basal appendage slender, fused laterally with base of flagellum, projecting beyond base (Fig. 108).

Plant association. Several species near Piper hispidum , such as P. sancti­felicis (Marquis 12, Prena 34), P. epigynium (Marquis 2, Prena 6), P. bisasperatum (Marquis 1, Prena 4).

Distribution. Costa Rica, Atlantic side and western Panama (Fig. 254), possibly Pacific side of Colombia and Ecuador (1 specimen in HAHC, not included in type series).

Specific epithet. The name is a Latin adjective meaning “not corresponding”.

Discussion. Embates discordabilis is a poorly differentiated complex of local populations with variously developed ante­macular fasciae, which usually blend with the postmacular element to a continuous, dorsolateral vitta. Specimens with a discontinuous dorsolateral vitta (Fig. 105b) occur in the border region of the provinces of Limón ( Costa Rica) and Bocas del Toro ( Panama). Continuous dorsolateral vittae are present in a number of other species, such as E. latevittatus and the E. leucopleura complex. In doubtful cases, those species can be distinguished by the more elongate aedeagus and the shorter flagellum. Embates discordabilis is related closely to E. pictipennis and E. euscheme , and some of their subpopulations approach each other notably. The appendages of E. discordabilis are generally stouter than in those two species, but this difference fades in populations from the eastern part of the Cordillera de Talamanca. The type specimen represents the rather uniform and widely distributed population present in the northern Atlantic lowlands of Costa Rica.