Paraclius norrbomi, Soares & Capellari & Ale-Rocha, 2023

Soares, Matheus M. M., Capellari, Renato S. & Ale-Rocha, Rosaly, 2023, New or little-known Neotropical Dolichopodidae (Diptera) (II): genus Hercostomus Loew excluded from the Neotropics, Zootaxa 5254 (2), pp. 181-208 : 198-201

Paraclius norrbomi sp. nov.

( Figs 11 , 12 , 16 )

Diagnosis (male). Face as wide as ocellar tubercle ( Fig. 11B ). Postpedicel subtriangular, brown, except basal 1/3 orange yellowish ( Fig. 11C ). Legs mostly yellow, except lateral surface of coxa II, tarsus II and III becoming brown from apex of tarsomere 1 ( Fig. 11A ); tarsus I cylindrical with ventral surface covered by whitish pile from apical 2/3 of It 1 ( Fig. 11E, F ). Wing gently brownish; M 1 gradually curved towards R 4+5, slightly convergent at apex ( Fig. 11G ). Hypopygium as long as abdomen ( Fig. 11D ); cercus branched, dorsal branch short, about 1/2 as long as ventral branch, nearly straight, truncated, with a few slender setae at apex, ventral branch short and wide, about 1/5 of length of epandrium, truncated, with several ribbon-like setae at apex, outer surface covered by short slender setae, longer at ventral edge ( Fig. 12D ).

Description. Male. Body length (holotype): 3.6 mm. Wing: 2.9 mm long, 0.9 mm wide. Similar to Paraclius latipes , except as noted. Head ( Fig. 11B, C ). Upper-most 5 postocular setae black, lower white, ending in 1 longer white seta. Face as wide as ocellar tubercle, about 2.5X longer than clypeus; clypeus quadrangular; antenna orange yellowish, except apical 2/3 of postpedicel brown; postpedicel subtriangular, slightly longer than wide and covered by short whitish pubescence; arista-like stylus brownish, dorsal, arising from basal half of postpedicel, about 3.5/5 of eye height, two-segmented, first segment short, ending at apex of postpedicel, second segment long, about 4X longer than first segment, covered by short setulae. Thorax ( Fig. 11A ). Mesonotum with strong bluish and purple reflections. Scutellum concolorous with mesonotum. Pleura brownish, covered by silvery pruinosity, with weak metallic green reflections, metepimeron brown. Chaetotaxy: scutellum with pair of strong medial scutellars and pair of smaller setae laterad, about 1/5 as long as medial scutellars. Wing ( Fig. 11G ). Membrane gently brownish; length of crossvein dm-m/last part of M 4 (“CuAx ratio”): 0.85. Legs ( Figs 11A, E–F ). Mostly yellow, except lateral surface of coxa II, tarsus II and III becoming brown from apex of tarsomere 1; setae on legs black, unless otherwise mentioned. Leg I. Podomere ratios: 34, 28, 13/4/4/3/3. Anterior surface of coxa I covered by short setae, outer edge with 2 strong setae, 1 after middle and 1 near apex, apical edge with 1 long and strong and 2 short setae. Femur I covered by short vestiture ofsetae, except ventral surface mostly bare, with 1 short posteroventral preapical seta. Tibia I with 1 anterodorsal seta at 2/6, 3 posterodorsal setae at 2/6, 3.5/6, and 1 preapical, 1 posterior preapical seta, and 1 anterodorsal row of short, stout setae from basal 3/6 to apex. Tarsus I with ventral surface covered by whitish pile from apical 2/3 of It 1 (MSSC). Leg II. Podomere ratios: 43, 40, 17/11/9/4/4. Anterior surface of coxa II covered by short setae, inner edge with long setae at basal 1/2, outer edge with 1 strong seta at middle, apical edge with 2–3 short setae. Femur II covered by short vestiture of setae, except ventral surface mostly bare, with 1 strong anterior seta at apical 5/6 and 1 short posteroventral preapical seta. Tibia II with 3 pairs of antero- and posterodorsal setae at 1/6 (about half-length of second pair), 1.5/6 and 4/6, 1 anterodorsal seta at 2.5/6, 1 anteroventral seta at 2.5/6, 1 antero- and 1 posterodorsal, 1 anteroventral, 1 ventral and 1 posterior setae at apex. Leg III. Podomere ratios: 43, 49, 12/19/14/9/5. Anterior surface of coxa III with 1 long seta at apical edge, lateral surface with 1 long seta at middle and 1 short at apex. Femur III laterally compressed, about 1.35X wider than femur II at broadest point, covered by short vestiture of setae, except ventral surface mostly bare, with 1 strong anterodorsal seta at 4.5/6, and 1 anteroventral long seta at 5/6. Tibia III with 3 pairs of antero- and posterodorsal setae at 1/7 (about half-length of second pair), 1.5/7, and 3/7, 2 anterodorsal setae, 1 at 4.5/7 and 1 at 6.5/7, 2 posterodorsal setae, 1 at 4/7 and 1 at 5.5/7, 1 ventral seta at 4.5/7, 1 anterior and 1 ventral setae at apex, ventral row of 3–4 short setae from basal 2/7 to apical 4/7. IIIt 1 with 1 short basiventral seta. Tarsus III unmodified. Abdomen ( Fig. 11A, D ). Mostly metallic green with bluish reflections, tergites 1–5 setose, posterior margins with longer setae, tergites 6 and 7 bare; sternite 8 brown, with weak greenish reflections, covered by short, sparse black setae, longer at posterior margin. Hypopygium ( Fig. 12 ). As long as abdomen; epandrium dark brown, with weak bluish and greenish reflections, 2.5X longer than high, truncated at apex, with 1 short basiventral seta ( Fig. 12A, B ); apicoventral lobe small and digitiform, with two short and slender setae, 1 at middle and 1 at apex, both as long as apicoventral lobe ( Fig. 12B, C ); ventral lobe of surstylus somewhat L-shaped at base, abruptly narrowing towards apex, forming long digitiform projection, with 1 short dorsal stout seta at middle ( Fig. 12C, F ); dorsal lobe of surstylus slightly shorter than ventral lobe, narrowing abruptly at apex, forming long digitiform projection dorsally directed, with 1 short slender seta at middle of inner edge ( Fig. 12G ); postgonite short, bifurcate, well sclerotized and curved ventrally at apex, somewhat V-shaped in ventral view ( Fig. 12C ); basal sclerite of sperm pump narrow and strongly sclerotized, connected posteriorly to sperm pump ( Fig. 12C ); sperm pump short, folded over itself, shorter than ejaculatory apodeme ( Fig. 12C ); ejaculatory apodeme long and narrow, somewhat knife-shaped, ventral edge weakly sclerotized ( Fig. 12C ); proctiger wide, cup-shaped ( Fig. 12C ); hypandrium asymmetrical, with 1 wide and serrate hypandrial process at apex ( Fig. 12A, B, E ); basal part of phallus weakly connected with apical part, ventral and dorsal edges of apical part of phallus serrate and strongly narrowing apically ( Fig. 12C ); cercus branched, dorsal branch short, about 1/2 as long as ventral branch, nearly straight, truncated, with a few slender setae at apex, ventral branch short and wide, about 1/5 of length of epandrium, truncated, with several ribbon-like setae at apex, outer surface covered by short slender setae, longer at ventral edge ( Fig. 12D ). Female. Unknown.

Type material. HOLOTYPE ♁ labelled: “ COSTA RICA: Guanacaste | Santa Rosa, N.P. [ca 10°50′10.2″N 85°42′19.6″W], 350m dry | forest, yellow pantrap (25 YPT | C-04), 11–12.iii.1996, L. Masner ” ( CNC); “HOLOTYPE | Paraclius norrbomi | Soares, Capellari & Ale-Rocha [red label]” . Holotype condition: good, terminalia dissected and stored in microvial. PARATYPE: same data as holotype (1 ♁, dissected, INPA) .

Remarks. Paraclius norrbomi sp. nov. differs from all the other known species of the latipes -group by the ventral branch of the cercus truncated at apex with strong setae and proctiger cup-shaped.

Etymology. Named after Allen Norrbom (NMNH) for his constant collaboration with the loan of specimens and photographs of type material that made it possible to complete this study.

Distribution. Costa Rica ( Fig. 16 ).

Figures

FIGURE 11. Paraclius norrbomi sp. nov., male holotype (CNC) (before dissection). A. Habitus, lateral view; B. Head, anterior view; C. Head, lateral view; D. Abdomen and hypopygium, lateral view; E, F. Tarsus I, ventral and anterior views, respectively; G. Left wing.

FIGURE 12. Paraclius norrbomi sp. nov., male holotype(CNC).A, B. Hypopygium, not macerated and macerated, respectively, left lateral view; C. Internal appendages, right lateral view; D. left cercus, outer view; E. Hypandrium, right lateral view; F. Right ventral lobe of surstylus, inner view; G. Right dorsal lobe of surstylus, inner view. Abbreviations: apv lb = apicoventral epandrial lobe; bs sp = basal sclerite of sperm pump; cerc = cercus; d sur = dorsal lobe of surstylus; ej apod = ejaculatory apodeme; epand = epandrium; hypd = hypandrium; hypd pr = hypandrial process; pgt = postgonite; ph = phallus; prct = proctiger; sp = sperm pump; v sur = ventral lobe of surstylus.

FIGURE 16. Geographic distribution of species of the Paraclius latipes-group treated here.