Dirrhinodryinus, Martins & Melo, 2024

Martins, André L. & Melo, Gabriel A. R., 2024, Phylogenetic analysis of Neotropical Dryinus using morphological characters: new proposed classification for species groups and description of a new genus (Hymenoptera: Dryinidae), Zoological Journal of the Linnean Society 202 (3) : -

Dirrhinodryinus gen nov.

Type species: Alphadryinus lamellatus Olmi, 1984 , comb. nov..

Included species: Dirrhinodryinus lamellatus ( Olmi, 1984) , comb. nov.; Dirrhinodryinus caraibicus ( Olmi, 1984) , comb. nov..

( Figs 5–7)

Diagnosis: Head transverse, vertex level with upper summit of compound eyes in frontal view; flagellomeres 3–7 with two sets of separate grooves of rhinaria each; apical margin of clypeus convex; maxillary and labial palpomeres formula 6: 3; occipital carina complete or incomplete, extending dorsally on vertex, behind the ocelli; frontal line incomplete, almost reaching clypeus. Forewing with two dark transverse bands; stigmal vein of forewing with 3Rs%4Rs longer than 2r-rs; posterior surface of propodeum with two longitudinal carinae; claws of middle and posterior legs slender, gently curved, and accompanied by a long bristle; rudimentary claw longer than arolium.

Description: Head transverse ( Fig. 5C), vertex straight in frontal view, level with upper summit of compound eyes ( Figs 5B, 6B); TL surface absent; occipital carina complete or incomplete, restricted to the vertex, behind the ocelli; eye with or without dense pilosity; flagellomeres 3–7 with two sets of separate grooves of rhinaria each, flagellomere 8 variable, with two or three sets; frontal line incomplete ( Figs 5C, 6C); apical margin of clypeus ( Figs 5B, 6B) convex; mandible with four teeth, 2nd and 3rd subapical teeth subequal in size; maxillary and labial palpomeres formula 6: 3. Pronotum crossed by strong transverse impression at its central portion ( Figs 5A, E, 6A, E); notauli percurrent ( Figs 5D, 3F) or not percurrent ( Figs 6D, 3E), when percurrent converging posteriorly; acetabular carina present or absent; anterior surface of mesoscutellum with one groove straight, and deep groove, or with two large groove on anterior surface. Forewing with two dark transverse bands ( Figs 5A, 6A); stigmal vein of forewing with 3Rs%4Rs longer than 2r-rs; vein M and Cu diverging apically to cu-a. Ŋe 2nd and 3rd protarsomeres produced in hooks; enlarged claw of chela with one row of bristles, with or without one long lamella in central region; apex of enlarged claw with or without subapical tooth; claws of the middle and posterior legs slender, gently curved, and accompanied by a long bristle; tibial spur formula variable, 1/1/2 or 1/0/2. Posterior surface of propodeum with two longitudinal and one transversal carinae.

Etymology: Ŋe genus is named asser the two sets of rhinaria. Key for the species of Dirrhinodryinus gen. nov.

1. Frontal line complete ( Fig. 6B, C); eye glabrous ( Fig. 6B, C); occipital carina incomplete, restricted to the vertex ( Fig. 6C), behind the ocelli; mandible base shorter than malar space; 1st flagellomere 3.2× longer than 2nd one ( Fig. 6C); 8th flagellomere with two separate sets of rhinaria at the base and a single set apically; enlarged claw with one subapical tooth, and one row of six bristles ( Fig. 3A); mid-tibia with one spur............................. Dirrhinodryinus caraibicus (Olmi) comb. nov.

– Frontal line incomplete ( Fig. 5B, C); eye with dense short pilosity ( Fig. 5B, C); occipital carina complete ( Fig. 5C); mandible base longer than malar space; 1st flagellomere 1.8× longer than 2nd one; rhinaria on 8th flagellomere not differing from those on basal flagellomeres; enlarged claw of chela without subapical tooth, with one row of four bristles and one long lamellae ( Fig. 3B); mid-tibial spur absent ............................................................... Dirrhinodryinus lamellatus (Olmi) comb. nov.