The Neotropical Species Of Small Carpenter Bees Of The Subgenus Ceratina (Zadontomerus) Ashmead, 1899 (Hymenoptera: Apidae) Author Flórez-Gómez, Nathalia Author Ayala, Ricardo 0000-0002-7718-1853 rayala@ib.unam.mx Author Hinojosa-Díaz, Ismael Author Morrone, Juan J. 0000-0001-5566-1189 morrone@ciencias.unam.mx text Zootaxa 2022 2022-12-01 5214 2 189 223 journal article 198861 10.11646/zootaxa.5214.2.3 91d06dd7-1d57-4442-8fb2-1a6e3fc1c295 1175-5326 7384856 D982762A-A869-4375-9803-13A74D71335D Ceratina ( Zadontomerus ) basaltica Flórez-Gómez, Hinojosa-Díaz & Ayala new species ( Figures 9 , 10 , 22E , 23F , 24E , 28 ) Diagnosis: Females from 7.0–9.0 mm, males from 6.0– 7.5 mm in length. Both sexes with preoccipital foveate carina, more evident in males, pronotal lobe with yellow mark, body dark greenish to olive green with metallic tones, subhyaline wings with brown venation. Female genal area wider than eye width in lateral view; disc of scutum with sparse punctures along the median line, separated by a distance up to 5 times a puncture diameter. Male ventral surface of hind femur with an acute dilation ( Fig. 22E ); T6 with medial swollen area strongly evident and yellowish tuft of pubescence; and T7 with concave lateral margins, forming a medial rounded projection ( Fig. 23F ). Similar to C. rehanae , this species is recognizable by the color of the wings, which are lighter; females can be distinguished by the polished and impunctate genal area adjacent to the compound eye, disc of scutum with fewer punctures in contrast to C. rehanae , in which the punctures are more conspicuous. Males can be easily recognized by the swollen area in the middle of T6. FIGURE 9. Ceratina basaltica sp. n. A: Paratype, female lateral habitus, B: Paratype, female frontal view, C: Holotype, male lateral habitus, D: Holotype, male frontal view. FIGURE 10. Genital capsule of Ceratina basaltica sp. n male. A: Dorsal view, B: ventral view. Description. Holotype male. Length 7.4 mm . Body olivaceous greenish with metallic tones. Head. Mandibles with two teeth, dark brownish, outer margin with scattered whitish hairs. Labrum with squareshaped yellow mark in the middle. Clypeus with inverted T-shaped yellow mark. Supraclypeal and paraocular area densely punctate. Frons, area surrounding frontal lobes, and vertex with punctures densely distributed and scattered yellowish hairs. Eyes convergent below. Gena densely punctate, with whitish, long, scattered pubescence in the lower area. Preoccipital carina well developed with foveae, more evident than females. Scape with yellowish and scattered hairs, scape, pedicel and flagellum black to dark brown. Head length 1.6 mm ; head width 1.92 mm ; lower interocular distance 1.01 mm ; upper interocular distance 1.25 mm ; ocellocular distance 0.38 mm . Mesosoma. Pronotum with lateral carina; pronotal lobe with yellow mark. Mesepisternum with scattered short and whitish pubescence and dense punctation, punctures separated by a distance 0.5–2.0 times their diameter; hypoepimeral area with fine and close punctures becoming more widely separated in the lower area. Scutum, anterior area between notauli with punctures separated by distance of one puncture diameter, disc with punctures dispersed along the anteromedian line, separated by a distance greater than a puncture diameter, posterior area densely punctured. Scutellum densely punctured, becoming sparser on the disc, punctures separated by up to four times a puncture diameter. Propodeum basal area striate, lateral area with close, fine punctures and whitish plumose pubescence. Tegula dark brown. Wings subhyaline, pterostigma and venation brown. Length of forewing 4.81 mm . Scutum length 0.91 mm ; scutum width 1.3 mm . Legs. Hind trochanter, with short sparse pubescence, ventral margin slightly rounded. Hind femur medially dilated forming an acute projection, ventral margin almost hairless ( Fig. 22E ). Metasoma. T1 impunctate and polished but disc finely punctured. T2 and T3 with punctures densely distributed, becoming sparser on the disc, with a distance between punctures equal to or less than one puncture diameter. T4 with sparse punctures. T5 and rugose, with short and scattered pubescence. T6 integument as in T5, strongly projecting medially, tuft of yellow hairs on this projection. T7 with concave lateral margins, forming a medial rounded projection ( Fig. 23F ). S6, as shown in figure 24E. Genital capsule as shown in Figure 10 . Paratype female. Length 7.04 mm . Body dark green with metallic and olivaceous tones. Head. Mandibles with three teeth, color and pubescence as in male. Hypostomal carina with anterior tooth. Labrum black with scattered white pubescence. Clypeus with yellowish medial oval-shaped mark, surface with sparse punctures. Supraclypeal area with fine punctures between antennal sockets, medial area almost polished. Lower paraocular area densely punctate, upper area with punctures more widely separated than lower area, distance equal to or greater than one puncture diameter. Frons, area surrounding the impunctate swellings with punctures distributed heterogeneously, some areas with punctures separated by less than a puncture diameter, other areas with separation greater than a puncture diameter. Vertex with punctures densely distributed, distance between each one equal or less than puncture diameter, with sparse yellowish pubescence. Genal area wider than eye width in lateral view. Gena with punctures densely distributed in the upper area, distance between punctures less than or equal to a puncture diameter, becoming sparse below, area adjacent to eye polished and impunctate, reaching 1/3 of the gena. Preoccipital margin carinate. Antennae, color as in males. Head length 1.74 mm : head width 2.12 mm ; lower interocular distance 1.10 mm ; upper interocular distance 1.39 mm ; ocellocular distance 0.45 mm . Mesosoma. Pronotum as in males. Scutum, anterior area as in males, disc of scutum with sparse punctures and polished areas, posterior area as in male. Mesepisternum, scutellum, propodeum and wings as in male. Length of forewing 5.68 mm . Scutum length 1.1 mm ; scutum width 1.57 mm . Legs. Dark with metallic green tones. Base of tibia with yellow spot. Tarsi dark brown. Spurs whitish. Metasoma . T1-T4 punctures as in male. T4 with sparse punctures, posterior margin with short, dense pubescence, thick and thin hairs intercalated. T5 and T6 rugose, with short and scattered pubescence, with thick and thin hairs intercalated. Sternites with whitish, scattered and long pubescence. Type material: Holotype ( CNIN : 1♂ ): MEXICO : Distrito Federal : Ciudad Universitaria , REPSA , 2328m , 19. 31402, -99. 19172, 19-IX-2015 , A. Cervantes. Described paratype ( ♀ MZFC : 30923): Mexico City : Pedregal de San Ángel , 2250 m , 3-IX-1989 , A. Escalante y R . Delgadillo. Other paratypes : same locality as holotype ( MZFC : 2♀ : 30229, 30230). Other material examined: MEXICO . Mexico City : Pedregal de San Ángel , 2250 m 18-VII-1989 , R . Ayala ( MZFC : 6♀ : 30222, 30225, 30226, 30236, 30224, 30215) ; 6-X-1989 , M. Arteaga ( MZFC : 1♀ : 30228) ; 2-9-VI-1990 , R . Delgadillo ( MZFC : 5♀ : 30232, 30234, 30235, 30220, 30227) ; 13-22-XI-1990 , L. Pérez ( MZFC : 5♀ : 30221, 30214, 30216, 30218, 30223) . Ciudad Universitaria , 2328 m , 19.31457 , -99.1919 , 28-VI-2016 , C. Martínez ( CNIN : 6♀ ) ; 19.31402 N , - 99.19172 W , 10-16-IV-2015 , C. Martínez ( CNIN : 3♀ ) ; 20-VI-2015 , C. Martínez ( CNIN : 3♀ ) ; 25-IX-2015 , C. Martínez ( CNIN : 1♀ , 4♂ ) ; 10-X-2015 , C. Martínez ( CNIN : 2♀ ) . Guanajuato : Atarjea , 2149 m , 21.21, -99.83, 24-X-2012 , J. Mérida ( ECOAB : 1♂ ) . Hidalgo : Tulancingo de Bravo , El Paraíso , 2185 m , 20.15, -98.4161, 12-IV-1993 ( MZFC : 5♂ : 12101, 12105, 12104, 12102, 12103) . Michoacán : Zitácuaro , 25-X-1987 , T . Griswold ( BBSL : 2♀ ) . Distribution: Ceratina ( Z .) basaltica is distributed in central Mexico , along the Trans-Mexican Volcanic Belt and the Sierra Madre Oriental, above 2000 m . It is known for Mexico City , Guanajuato , Hidalgo and Michoacán . Etymology: The specific name refers to basalt, volcanic rock that forms the Ecological Reserve Pedregal de San Ángel, in Mexico City , the type locality. It is an adjective in the nominative singular.