Dissomphalus aretisus Brito & Azevedo, 2017

Azevedo, Celso O., 2017, Review of Dissomphalus Ashmead (Hymenoptera, Bethylidae) from Panama, with key to the Central American species, Zootaxa 4335 (1), pp. 1-72 : 49-50

Dissomphalus aretisus Brito & Azevedo , sp. nov.

( Figs 20 , 51 , 82 , 180–181 )

Description. Male. Body length 1.73 mm. Color: head castaneous; mesosoma and metasoma light castaneous. Head ( Fig. 20 ). Mandible with four distal teeth. Median clypeal lobe ill-defined, with one rounded very short tooth; median clypeal carina high in profile, incomplete apically, convex in profile. Frons weakly coriaceous and punctures small. Vertex crest straight. Pronotal disc weakly coriaceous; anterior margin ecarinate. Metasoma ( Fig. 51 ). Tergal process with lateral, shallow, circular and large depression, with small, low and dorsad tubercle placed on center of depression, pit small, with short tuft of setae. Posterior hypopygeal margin strongly concave ( Fig. 82 ). Genitalia ( Figs 180–181 ): paramere with dorsal margin entirely wide; apical margin truncate. Aedeagal ventral ramus shorter than dorsal body, wide, abruptly narrowing apicad; cross section laminar; ramous bifid, surface horizontal; inner margin sinuous; outer margin sinuous; apex short, simple, parallel; additional inner ramus absent; basal stub short and narrow. Aedeagal dorsal body with two pairs of apical lobes; outer lobe very short, horizontal and narrow, with apical margin abruptly acute and laterad; inner pair stout, membranous and setose. Apodeme extending beyond genital ring.

Remarks. This species is the most different in setosus species-group by having the aedeagal dorsal body elongated and very short apical lobes of the aedeagal dorsal body. These characters are easy to be recognized. This species is similar to D. filus , by having the aedeagal dorsal body elongated with small apical lobes of the aedeagal dorsal body. However, this species has the paramere the same size as the basiparamere, the apical lobes of the aedeagal dorsal body very short and wide and the aedeagal ventral ramus bifid whereas D. filus has the paramere longer than basiparamere, the apical lobes of the aedeagal dorsal body longer and narrow and the aedeagal ventral ramus not bifid. The base of the aedeagal ventral ramus has small lamelar projections that are difficult to see in magnifying glass, but easily seem in microscope. In this species-group just this species and D. w-aedeagus has the ventral ramus bifid.

Material examined. Holotype, ♂, PANAMA, Veraguas Pr [ovincia]: P[arque] N[acional] Coiba , Isla Coiba , Est [ación] Biologica Coiba , [07º28'09"N, 81º45'24"W], 5–6 ag 1998, Malaise, R. Cambra, A. Santos [col.] ( MIUP) . Paratypes: 3♂, same data as holotype ; Darién: 1♂, Est [acion] I[nstituto] N[acional de] Re [cusos] Na [turales] Re [novables], P[arque] Nac [ional] Darién, [07°51'26.3"N, 77°28'12.7"W], 5–28 feb 1993, Malaise, R. Cambra [col.] ( MIUP) .

Distribution ( Fig. 226 ). Panama (Veraguas and Darién).

Figures

FIGURES 13 – 24. Dissomphalus spp., ♂, head, dorsal view. 13. D. racarus sp. nov. 14. D. teraus sp. nov. 15. D. urazius sp. nov. 16. D. afestus sp. nov. 17. D. arbeius sp. nov. 18. D. raziogus sp. nov. 19. D. areius sp. nov. 20. D. aretisus sp. nov. 21. D. citus sp. nov. 22. D. sartus sp. nov. 23. D. teobus sp. nov. 24. D. terbius sp. nov.. Scale bars = 20 µm, except figs 14, 20 = 10 µm and fig. 15 = 50 µm.

FIGURES 45 – 56. Dissomphalus spp., ♂, metasomal tergal process, dorsal view. 45. D. teraus sp. nov. 46. D. urazius sp. nov. 47. D. afestus sp. nov. 48. D. arbeius sp. nov. 49. D. raziogus sp. nov. 50. D. areius sp. nov. 51. D. aretisus sp. nov. 52. D. citus sp. nov. 53. D. sartus sp. nov. 54. D. teobus sp. nov. 55. D. terbius sp. nov. 56. D. abarus sp. nov.. Scale bars = 20 µm except, figs 45 and 46 = 50 µm.

FIGURES 76 – 87. Dissomphalus spp., ♂, hypopygium, internal view. 76. D. teraus sp. nov. 77. D. urazius sp. nov. 78. D. afestus sp. nov. 79. D. arbeius sp. nov. 80. D. raziogus sp. nov. 81. D. areius sp. nov. 82. D. aretisus sp. nov. 83. D. citus sp. nov. 84. D. sartus sp. nov. 85. D. teobus sp. nov. 86. D. terbius sp. nov. 87. D. abarus sp. nov.. Scale bars = 125 µm.

FIGURES 174 – 183. Dissomphalus spp., ♂, genitalia, except fig. 177 paramere. 174. D. bilobatus. Lateral view. 175 – 177. D. rufipalpis 175. Dorsal view. 176. Ventral view. 177. Dorsal view. 178 – 179. D. areius sp. nov. 178. Dorsal view. 179. Ventral view. 180 – 181. D. aretisus sp. nov. 180. Dorsal view. 181. Ventral view. 182 – 183. D. citus sp. nov. 182. Dorsal view. 183. Ventral view. Scale bars = 250 µm.

FIGURES 224 – 233. Known distribution of Dissomphalus in Panama. 224. Provinces and Counties of Panama. 1. Bocas del Toro. 2. Chiriquí. 3. Ngöbe-Buglé County. 4. Veraguas. 5. Herrera. 6. Los Santos. 7. Colón. 8. Coclé. 9. Panama. 10. Guna Yala County. 11. Darién. 12. Emberá Woonan County. 225. D. abarus sp. nov., D. afestus sp. nov. and D. altivolans. 226. D. angulatus sp. nov., D. ardonius sp. nov. and D. aretisus sp. nov.. 227. D. apertus, D. areius sp. nov. and D. arteobius sp. nov.. 228. D. arbeius sp. nov., D. asitius sp. nov. and D. brasiliensis. 229. D. arteus sp. nov., D. cervoides and D. culteratus. 230. D. asfartus sp. nov.. 231. D. azagus sp. nov., D. bilobatus and D. coronatus. 232. D. borus sp. nov., D. citus sp. nov. and D. curvifoveatus. 233. D. declinatus, D. dilatatus and D. ettus sp. nov..