Embates aliquantulus Prena, 2005

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

60. Embates aliquantulus Prena sp. n.

(Fig. 204–208, 252)

Holotype male (dissected), Costa Rica , labeled: “Cerro de Oro, Rio Nino, Prov. Punta,/ COSTA RICA. 140m, 5 MAY 1995. A./ Azofeifa. L S 279300 519000 #5293”, CRI002 234505 ( INBC).

Paratypes 63 (27 males, 36 females), Costa Rica and Panama, labeled: “ Panamá: Panamá Pr. / Cerro Campana , 850 m. / 8° 40' N, 79° 56' W ”, “18 Jul ‘76/ H.P. Stockwell ”, “ Ambates / 21”; same label except “17 July ‘77/ Stockwell”, “3 Jun. ‘75/ H.P. Stockwell ”, “31 May ‘75/ Stockwell”, “ 23.V.1970 / H.A. Hespenheide ”, “ 14.VII.1974 / H.A. Hespenheide ”, “ 26.VI.1971 / H.A. Hespenheide ”, “ 8.IV.1970 / H.A. Hespenheide ”, “ 14.VII.1971 / H.A. Hespenheide ”, “30 May ‘70 H. Stockwell ”, “3 Jun. ‘72 Stockwell”, “12 Mar. ‘72 Stockwell”, “10 Feb. ‘73 Stockwell”, “4 Jan. ‘92 Stockwell”, “25 May ‘74 Stockwell” ( CHAH 5 , CMNC, HPSC 6 , JPPC 3 ) ; “ Cerro Campana / 800m R. de Pan. / 8° 40' N 79° 56' W / 25 Apr 73 Engleman” ( HPSC) ; “ Cerro Campana ,/ 3000', Panama./ July 30, 1970,/ H. & A. Howden ” ( HAHC) ; same label except July 29, 1970 ( HAHC) ; “ PANAMA: Panama/ Cerro Campana / 21 June 1981 / B. Gill 900 m ” ( JPPC) ; “ PANAMA: Panama/ Cerro Campana / 26 May ‘73 454m. / Ginter Ekis” ( CWOB) ; “ PANAMA, Panama,/ Cerro Campana ,/ V­ 17­1993, 850m. / E.G. Riley ” ( CWOB 4 ) ; “ PANAMA, Pan. / Cerro Campana / VII­29­ 1995 / C.W. & L.B. O’Brien ” ( CWOB) ; “ PANAMÁ: Panamá,/ Cerro Campana ,/ VI­20­ 1985, E./ Riley & D. Rider ” ( JPPC) ; “ PANAMA: Pma P.:/ Cerro Campana / 8° 40' N, 79° 56' W / 26 May 1971 / R. Belzer ” ( NMNH) ; “ PANAMA / Cerro Campana / VI­29­1974 C.W. & L./ O’Brien & Marshall” ( JPPC) ; “ PANAMA, Pan., 2700'/ Cerro Campana ,/ May 13, 1978 CW & LB/ O’Brien & Marshall” ( JPPC) ; “ PANAMA: PANAMÁ / Cerro Campana , 900/ – 950m, 5.VI.1995 –04, R.S./ Anderson, wet mont. for.” ( CMNC) ; “ PANAMA: Panama Prov. / Cerro Campana , 850m / 8*40'N 79*56'W/ 1.vii.1972 / Gard Otis” ( HAHC) ; “ PANAMA: Coclé Prv. / 5 km N of El Copé / Cont Div­ 850 m elev/ Stockwell & Windsor”, “Coll­td/ 15 Jun. ‘91” ( HPSC) ; “ PANAMA: COCLÉ / 7.2 km N.E. El Copé / 730m, 20.V– 7.VI.1995 / J. Ashe & R. Brooks / ex: f.i.t. (140)” ( JPPC) ; “ PANAMA: Canal Area / Fort Sherman / 10 Jun ‘95 Stockwell” ( HPSC) ; “ PANAMA, Colon, C.Z.,/ Ft. Sherman, Old Ft. San / Lorenzo Rd. 7­31­1995 / C.W. & L.B. O’Brien ” ( CWOB) ; “ PortoBello / PanFeb 28­ 11”, “EA Schwarz/ Collector”, “ Ambates / leucopleura/ var. Champ.” ( NMNH) ; “PAN­ AMÁ, 700m. / El Valle/ May 17, 1973 / P.D. Ashlock ” ( CWOB) ; “ PANAMÁ: Panamá,/ Cerro Jefe ,/ June 9, 1985 / E. Riley & D. Rider ” ( CWOB) ; “V. de Chiriqui / below 4,000 ft.,/ Champion.” ( BMNH) ; “V. de Chiriqui / 25–4000 ft. / Champion.” ( BMNH 2 ) ; “ Bugaba ,/ Panama./ Champion.” ( BMNH 2 ) ; “ Bugaba,/ Panama./ Champion. ”, “ ♂ ”, “GCChampion/ Determined”, “ Ambates / leucopleura/ small form Ch” ( NMNH) ; “PAN­ AMÁ: Chiriquí,/ Hartmann’s finca,/ St. Clara , VI­15­/ 18­85 Riley & Rider” ( CWOB) ; “ PANAMA, Chiriqui / Prov. 2 km N Sta. / Clara , 1300m, 8° 51' N,/ 82° 46' W Hartmann’s/ Finca 30–31.V.77/ H. & A. Howden ” ( HAHC) ; “ PANAMA: Chiriqui / N. Sta . Clara/ 8° 51' N; 82° 46' W./ 31 May ‘77 Stockwell” ( HPSC) ; same label except 20 May ‘77 ( HPSC) ; “ PANAMA: Chiriqui Prov. / nr. Candela , el. 1300 m / 24 AUG 1982 H. Stockwell ” ( HPSC 2 ) ; “ PANAMÁ: Chiriquí Prov. / Las Lagunas, El. 1360 m./ 4 km W. Hato del Volcán ”, “22 May ‘77/ H.P. Stockwell ” ( HPSC) ; “ PANAMA, Chir., Res. / For. La Fortuna , Cont. / Divide Tr., 7­20­1995 / C.W. & L.B. O’Brien ” ( CWOB) ; “ Sector Altamira, Buenos Aires, PILA, Prov. / Punta , COSTA RICA. 1400 m. Jul 1994, R./ Delgado, L S 332700_572400 #3137”, CRI001 988734 ( INBC) ; “ P.N. Manuel Antonio, 80m / Quepos, Prov. Punt. / COSTA RICA./ G. Varela, Oct 1991,/ L­S­370900, 448800”, CRI000 501554 ( INBC) ; “ Quepos, 80m, P.N. Man­/ uel Antonio, Prov. Punt. / COSTA RICA, R. Zuniga, Abr 1991./ L­S­ 370900, 448800”, CRI000 577938 ( JPPC) ; “ P.N. Manuel Antonio, 80m / Quepos, Prov. Punt. COSTA/ RICA. Jul 1991. G. Varela. / L­S­370900, 448800”, CRI001 413177 ( INBC) ; “ Costa Rica, San José, 8.3 mi N San Isidro de General ” ( TAMU) ; Costa Rica, Puntarenas, Est. Pittier, sendero a Rio Canasta , 1750­1800m, 6­28 Marzo 1996, M Moraga, Trampa sombrereta, L_S 332100_576800, CRI002 372085 ( INBC) ; Costa Rica, Puntarenas, Fila Cruces, Laguna Gamboa , 1400m, 1 May 1996, I.A Chacón, L_S_3042200_574850, CRI002 447897 ( INBC) ; “ COSTA RICA, Punt, R./ F. Golfo Dulce , 10 m, 3k./ S. Rincon, vii­1991, ma­/ laise trap, P. Hanson” ( CWOB) ; “ COSTA RICA, Melleza [Las Mellizas]/ 1300m (nr. Candelas ,/ Pan. ) 7.VI.1977 / H. & A. Howden ” ( JPPC) ; “C.R.: Puntarenas:/ P. N. Corcovado / D. R. Whitehead / 10–20. VIII. 1980 ”, “Ambatini/ #4/ det. DR Whitehead ” ( NMNH) ; “ Costa Rica, Puntarenas / Osa, Rio Rincón / 29.12.1995 lg. Prena” ( JPPC) .

Description. Habitus: Fig. 204, total length 4.0– 7.3 mm (m=5.7, n=58). Color: integument piceous; basic vestiture of small cupreous and occasionally some yellow scales along distal portion of striae, yellow scales condensed in well­defined dorsolateral vitta between head and elytral apices; venter with dense vestiture of light yellow scales on prosternum and along flank. Head: frontal fovea minute or absent, rostrum slender, subcylindrical (Fig. 205), costate dorsomedially, basolateral margin moderately edged, length of rostrum ♂♂ 1.21–1.41 x (m=1.31, n=25), ♀♀ 1.23–1.56 x (m=1.33, n=33) pronotal length, length of ante­antennal portion ♂♂ 0.48–0.52 x (m=0.50, n=24), ♀♀ 0.50–0.53 x (m=0.52, n=32) total rostral length, dorsal margin of antennal scrobe reaching rostral base before eye; funicular segment 2 slightly longer than 1 (Fig. 206), club oblong ovate. Pronotum: length 0.88–1.04 x (m=0.97, n=57) maximum width, sides rounded, widest in basal third, anterior portion tubulate; disk densely punctate, intervals granulose. Elytra: length 1.96–2.13 x (m=2.07, n=57) width at humeri, width 1.17–1.29 x (m=1.22, n=57) maximum pronotal width, sides subparallel in basal half, then increasingly converging toward apex, apices rounded conjointly, preapical callus weakly developed, striae fine, punctures indistinct, interstriae flat, none costate. Legs: tibiae moderately (Cerro Campana) to slightly (elsewhere) curved, ventrodistally with short fringe of cupreous hairs, tarsal claws arcuate and separate at base. Male: apex of aedeagus blunt, middle sclerotized, anterolateral portion membranous (Fig. 207), body of aedeagus of moderate length, basal third angular in lateral view, apodemes 2.3 x longer than body of aedeagus, flagellum thin, longer than apodemes, transition to curved base gradual, basal appendage elongate, curved, fused laterally with base of flagellum, projecting far beyond base (Fig. 208).

Plant association. Not known.

Distribution. Costa Rica, Pacific side to central Panama (Fig. 252).

Specific epithet. The name is a Latin adjective meaning “fairly little”.

Discussion. This is Champion’s “small variety” of E. leucopleura . The rich material now available demonstrates highly significant differences not only in the size, but also in body proportion and antennal insertion. The elytra of E. aliquantulus are parallel­sided in the basal half rather than being narrowed from near the base as in E. leucopleura . Embates aequiperabilis is very similar and can be recognized by the nude flank of the first ventrite.