Two new species of Optatus Pascoe and Macroptatus Heller (Coleoptera, Curculionidae, Baridinae), with a reappraisal of generic characters Author Prena, Jens text Zootaxa 2023 2023-02-21 5244 4 377 386 http://dx.doi.org/10.11646/zootaxa.5244.4.4 journal article 10.11646/zootaxa.5244.4.4 24ae007c-99df-43b5-951a-15bb357c5254 1175-5326 7663616 E66B6E87-EF0B-4473-923A-DD123C53DD43 Key to the known species of Optatus and Macroptatus 1 Procoxae nearly contiguous ( Figs. 8–9 ); prosternal canal at least frontally with lateral ridges; elytron without transverse color pattern; interstria 9 carinate throughout; body length < 10 mm ; Optatus .......................................... 2 - Prosternal process separating procoxae by about 1/4 their own width ( Figs. 10–11 ); prosternal canal without lateral ridges; elytron with transverse pattern (fascia or spots); interstria 9 carinate in basal half; body length> 10 mm ; Macroptatus ..... 5 2 Pronotum with interstices forming fine vermiculate ridges; prosternal canal anteriorly as wide as procoxa; mesosternal interspace of metaventrite not protruding beyond mesocoxa; male rostrum without dorsomedian carina; vestiture generally evenly distributed.......................................................................................... 3 - Pronotum with interstices wide and irregular; prosternal canal not nearly as wide as procoxa; mesosternal interspace of metaventrite often protruding slightly beyond apex of mesocoxa; male rostrum with dorsomedian carina; vestiture unevenly distributed, either arranged in fascicles or with glabrous portions.................................................... 4 3 Pronotum and ventrites with vermilion vestiture; body slightly stouter, with elytral apices more narrowly rounded; México south of Transmexican Volcanic Belt to Guatemala ................................................. O. palmaris - Pronotum and ventrites with vermilion vestiture reduced or absent; body slightly more elongate, with elytral apices more broadly rounded; Guatemala [plus 1 unconfirmed record from Costa Rica in MfNB]...................... O. inornatus 4 Body stout, elytra across humeri almost as wide as long; dorsal vestiture sparse except on distal third; interstria 9 distinctly carinate; Panamá ........................................................................... O. stockwelli - Body more elongate, elytra distinctly longer than wide; dorsal vestiture fasciate but evenly distributed; interstriae 7–10 partially carinate or at least convex; central México to Costa Rica .......................................... O. fasciculosus 5 Vestiture black with vermilion elytral fascia, metaventrite anteriorly protruding well below mesocoxa; rostrum with ventrolateral margin coarsely corrugated; pronotum with notosternal suture obliterated in anterior 2/3; Costa Rica .... M. championi - Vestiture khaki with transversely arranged dark spots; metaventrite anteriorly not protruding below mesocoxa; rostrum with ventrolateral margin moderately corrugated; pronotum with notosternal suture obliterated in anterior 1/2; México east of Isthmus of Tehuantepec, El Salvador ............................................................... M. deppens