Dirrhinodryinus caraibicus ( Olmi, 1984 ) 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), pp. 1-23 : 11-14

Dirrhinodryinus caraibicus ( Olmi, 1984) comb. nov.

( Figs 2A, B , 3A, C, E , 6 , 7A, B )

Dryinus caraibicus Olmi 1984: 849 .

Female holotype. Trinidad and Tobago: Trinidad, Arima, Simla ( CNC, examined through photographs).

Diagnosis: Body predominantly testaceous except, mesosoma black and one dark band at the vertex; metasoma dark brown; forewing with two dark transverse bands. Body with shorter and dense pilosity, except clypeus and eyes glabrous. Head rugose; pronotum rugose, except for several longitudinal carinae; mesoscutum, mesoscutellum, metanotum, mesopleuron, and metapleuron rugose; propodeum reticulate rugose. Head with vertex flat in frontal view; occipital carina incomplete, present only dorsally; frontal line incomplete near to clypeus; rhinaria composed of two sets in flagellomeres 3–8; notauli complete and divergent in the posterior surface of mesoscutum; stigmal vein of forewing with 2r-rs shorter than 3Rs&4Rs. Enlarged claw with one subapical tooth, and one row of six bristles.

Redescription: Female ( Fig. 6 ). Approximate body length: 4.8 mm. Colour: Head predominantly testaceous, except sulcus in malar space and vertex black ( Fig. 6B, C ); palpomeres testaceous; mandible testaceous, except by brown teeth; clypeus testaceous; antenna testaceous, except flagellomeres 2–3 brown testaceous ( Fig. 6A–C ); pronotum testaceous; mesosoma black ( Fig. 6A, D, E ); legs testaceous, except part of procoxa, mesocoxa, and trochanter; distal part of metafemur and metatibial brown testaceous; forewing with two dark transverse bands; metasoma brown testaceous. Pubescence: Head mostly with fine and dense pilosity ( Fig. 6B, C ); clypeus glabrous, except by anterior margin with dense pilosity; eye with fine, short, and sparse pilosity ( Fig. 6B, C ); mesosoma mostly with short and dense pilosity ( Fig. 6D, E ); mesoscutum with dense and fine pilosity ( Fig. 6D ); mesoscutellum and central portion of metanotum with dense and short pilosity ( Fig. 6D ); propodeum with fine and dense pilosity ( Fig. 6E ); metasoma with short and sparse pilosity. Integumental sculpture: Head rugose ( Fig. 6B, C ); pronotum rugose, except for several longitudinal carinae ( Fig. 6D, E ); mesoscutum, mesoscutellum, and metanotum rugose ( Fig. 6D ); mesopleuron and metapleuron rugose ( Fig. 6E ); propodeum reticulate rugose ( Fig. 6E ); posterior surface with two longitudinal, incomplete carinae. Structure and proportions: Occipital carina incomplete, present only dorsally ( Fig. 6C ). Ocellar ratio: OL = 7; POL = 6; OPL = 4; OOL = 20. Frontal line incomplete, absent near to clypeus. Antennomeres in the following proportions:38: 15: 50: 15: 16: 17: 15: 15: 14: 22. Antenna shorter than head plus mesosoma; 1st flagellomere more 3× than 2nd; 8th flagellomere with two separate sets of rhinaria at the base and a single set apically. Apical margin of clypeus convex. Notauli percurrent and divergent in the posterior surface of mesoscutum ( Figs 3E , 6D ); metanotum flat ( Figs 3E , 6D ). Stigmal vein of forewing with 2r-rs shorter than 3Rs&4Rs (30: 43). Enlarged claw with one subapical tooth, and one row of six bristles ( Figs 3A , 6F ). Protarsomeres in the following proportions: 38: 17: 15: 33: 55, enlarged claw (47). Tibial spur formula 1/1/2. Propodeum with dorsal surface longer than posterior (55: 45).

Male: Unknown.

Examined material: Brazil, Espírito Santo: One female: ‘ UFES n°\ 146535’ ‘BRASIL: ES: Santa Tereza \ Est. Biol. Santa Lúcia \ 11–12.xi.2009, Möericke,\ próximo ao rio e riacho\ Tavares, MT.; Azevedo ,\ C.O. & eq. col’. ( UFES). Minas Gerais: One female: ‘ Brasil, MG, Sete Lagoas,\ Embrapa Milho e Sorgo ,\ 19.4442°S 44.1497°W,\ 10–20.v.2010, I. Cruz,\ Armadilha Malaise’ ( MZSP). Paraíba: One female: ‘ MZSP \ 53429’ ‘ Brasil, PB, João Pessoa \ Mata do Buraquinho \ 07°08’25”S 34°51’ 38”W \ arm. Malaise 28–31.VII.2002, B1\ STP Amarante & eq. col.\\ BIOTA –FAPESP’ (MZSP); one female: ‘ MZSP \ 53430’ ‘ Brasil: PB, João Pessoa,\ Mata do Buraquinho \ 07°08’25”S 34° 51’ 37”W,\ arm. Malaise \ 25–28.VII.2002, B3\ STP Amarante & eq. col. // BIOTA –FAPESP’ (MZSP); one female: ‘ MZSP n°\ 000115’ ‘BIOTA–FAPESP// BRASIL: PR, João Pessoa,\ Mata do Buraquinho \ 7°08’25”S 34°51’38”W \ Armadilha Malaise –trilha, pto. 1\ 38– 31.vii.2002 \ STP Amarante & eq. col.’ ( MZSP). Paraná: One female: ‘ BRASIL: PR, Telêmaco Borba \ Reserva Samel Klabin \ 17/XII/87 arm. Malaise \ Levantamento Entomol. Profaupar’ ( DZUP). São Paulo: One female: ‘ BRASIL /SP/ Luiz Antônio \ Estação Ecológica de Jataí \ 21° 36’ 45.5”S / 47° 49’ 06.7”W \ Mata ciliar – Ligth trap. 2\ 28/I/2009 \ RIR Lara’ ‘ Dryinus 10 sp. n.\ exemplar 49D’ ‘ Dryinus caraibicus \ Olmi 1984 \ M. Olmi det. 2013’ ( LRRP); one female: ‘ BRASIL /SP/ Luiz Antônio \ Estação Ecológica de Jataí \ 21° 37’ 23.0”S / 47° 48’ 33.9”W \ Mata ciliar – Ligth trap. 2\ 30/IX/2009 \ N.W. Perioto’ ‘ Dryinus 10 sp. n.\ exemplar 37D’ ‘ Dryinus caraibicus \ Olmi 1984 \ M. Olmi det. 2013’ ( LRRP); one female: ‘ MZSP \ 53333’ ‘ MZSP// BRASIL: SP: Assis \ E. Ecol. De Assis 576m,\ 22°36’37.7”S 50°22’51.4”W \ 21.x.2009, Malaise \ A. S. Soares & eq. col.’ ( MZSP). Sergipe: one female: ‘ MZSP \ 53394’ ‘BRASIL: SE, Sta. Luzia do\ Inanhy, Crasto \ 11°22’37.4”S 7°24’50.3”W \ 29.VII–01.VIII.2001, Malaise \ M. T. Tavares & Eq. col. T4 ’ ( MZSP) .

Remarks: Dirrhinodryinus caraibicus comb. nov. differs from Dirrhinodryinus lamellatus comb. nov. by the frontal line complete ( Fig. 5B, C ); eye glabrous; occipital carina incomplete and present only at the vertex; mandible base shorter than malar space; antenna with 1st flagellomere 3.2× than 2nd flagellomeres; enlarged claw with one subapical tooth, and one row of six bristles; middle and posteriorly claw of legs with one seta not curved; spur mesotibial present; propodeum with posterior surface with two incomplete longitudinal carinae and without transverse one.

Figures

Figure 2. Electromicrography of Dirrhinodryinus and Dryinus species. A, flagellomere 7–8 of Dirrhinodryinus caraibicus with details of rhinaria; B, details of flagellomere 4 of Dirrhinodryinus caraibicus; C, flagellomeres 5–8 of D.onorei; D, antenna with details of flagellomeres with rhinaria of D.onorei. Scale bar. A and C (100 µm); B, 50 µm; D, 200 µm.

Figure 3. Electromicrography of Dirrhinodryinus species. A, chela of D.caraibicus; B, chela of D.lamellatus; C, middle leg of D. caraibicus; D, middle leg of D.lamellatus; E, mesosoma of D. caraibicus, dorsal view; F, mesosoma of D. lamellatus, dorsal view. Scale bar. A, B, E, and F 200 µm; C and D, 100 µm.

Figure 5. Dirrhinodryinus lamellatus (Olmi, 1984) comb. nov.. A, habitus, lateral view; B, head, frontal view; C, head, dorsal view; D, mesosoma, dorsal view; E, mesosoma, lateral view; F, propodeum, posterior view. Scale bar: A, 1.0 mm; B, C, 1.0 mm; D, E, 1.0 mm; F, 0.5 mm.

Figure 6. Dirrhinodryinus caraibicus (Olmi 1984) comb. nov.. A, habitus, lateral view; B, head, frontal view; C, head, dorsal view; D, mesosoma, dorsal view; E, mesosoma lateral view; F, chela. Scale bar. Scale bar: A, 1.0 mm; B, C, 1.0 mm; D, E, 1.0 mm; F, 0.5 mm.

Figure 7. Type species of Dirrhinodryinus. A, habitus of D.caraibicus& lateral view; B, labels of D. caraibicus; C, habitus of D. lamellatus, lateral view; D, labels of D. lamellatus. Scale bar.C, 1 mm.