Scaphisoma balteatum Mattews, 1888

Fierros-López, Hugo Eduardo, 2006, Four new species of Scaphisoma Leach with maculate elytra (Coleoptera: Staphylinidae: Scaphidiinae) from Mexico, with new records and comments on S. balteatum Matthews, Zootaxa 1279, pp. 53-68 : 66

Scaphisoma balteatum Mattews, 1888

( Fig. 2 e)

Material examinated. Costa Rica: ɗ, Guanacaste Prov., Est. Cacao, Lado SO Volcán Cacao P. N., 1000–1400 m, F. A. Quesada, 21–29.V.1992, 10°55’N, 85°28’W, CRI 000 523610 ( INBIO); Ψ, Est. Sta. Rosa, P. N. Sta. Rosa, 300 m, 3–12.VI.1992, III curso Parataxon. 10°50’N, 85°37’W, CRI 0000 428007 ( INBIO); ɗ, Est. Maritza, Lado O Vo. Orosí, 600 m, Tp. Malaise, 1988, 10°57’N, 85°29’W, CRI 000 270101 ( INBIO); México: ɗ, Jalisco, Casimiro Castillo, Arroyo Tacubaya, BTS, ex Oligoporus floriformis , 4.VII.2002, 19°35’47’’N, 104°25’52’’W, H. E. Fierros­López col. ( CZUG).

Comments. This was the only one species of Scaphisoma with maculated elytra previously cited from Mexico. Matthews (1888) described this species based on specimens from Jalapa (Veracruz) and Cerro de Plumas (Oaxaca). Scaphisoma balteatum can be recognized by uniform reddish coloration of pronotum, elytra orange with a black transversal band. Other diagnostic characters are parallel mesocoxal lines, sinuate metacoxal lines; elytra with sutural stria extended from apex to base, without basal stria; aedeagus ( Figs. 4 m–o) with median lobe symmetrical, apically pointed; parameres basally wider, with apex slightly curved toward inner area; internal sac with a portion of flagellum slightly coiled at the base of the median lobe. All characters of the specimens examined agree with the original description and illustration of S. balteatum ( Mattews, 1888) . This species is recorded for the first time from Costa Rica and Jalisco, Mexico.

Figures

FIGURE 2. Photographs of Scaphisoma. a) S. jaliscanum sp. nov. (paratype); b) S. cortesaguilari sp. nov. (paratype); c) S. opochtli sp. nov. (holotype); d) S. versicolor sp. nov. (paratype); e) S. balteatum Matthews. Scale bar 1 mm.

FIGURE 4. Aedeagi of Scaphisoma, dorsal, ventral and lateral views respectively. a – c) S. jaliscanum sp. nov.; d – f) S. cortesaguilari sp. nov.; g – i) S. opochtli sp. nov.; j – l) S. versicolor sp. nov.; m – o) S. balteatum Matthews. Scale bar 0.5 mm.