Martintella fernandoi, Vieira, Rodrigo, Rafael, José Albertino & Fisher, Eric M., 2014

Vieira, Rodrigo, Rafael, José Albertino & Fisher, Eric M., 2014, Two new species of Martintella Artigas, 1996 (Diptera, Asilidae, Asilinae) from Costa Rica, Zootaxa 3878 (5), pp. 451-461 : 457-460

Martintella fernandoi sp. nov.

( Figs. 29–40 )

Diagnosis. Five black ocellar macrosetae; male sternite VIII developed, fused only at base forming two triangular projections with long, yellow setae ( Fig. 29 ); epandrium apex triangular with small spiniform setae on inner margin ( Fig. 30, 32, 33 ); gonocoxite truncate apically, in lateral view ( Fig. 34 ); hypandrium with concavity on medioapical margin ( Fig. 37 ). Female: sternite VIII less than two times length of sternite VII ( Figs. 38, 39 ).

Male. Holotype. Head. Antenna black; 5 black ocellar macrosetae; vertex black, sparse golden tomentose; frons and face black, golden tomentose; mystax with black and yellow macrosetae; palpus with yellow setae; proboscis black with yellowish ventral bristles; labial setae yellowish; occiput with gray and golden tomentose; occipital setae whitish; postocular macrosetae yellow.

Thorax. Antepronotum and postpronotum black, golden tomentose; mesonotum black; posthumeral spot, prescutellar spot, and scutellar spot golden tomentose; pleura black, gray tomentose, except for primarily black portion of anepisternum. Chaetotaxy: 2 black notopleural macrosetae; 1 black supraalar macroseta; 2 yellow postalar macrosetae; 2 to 3 yellow and 1 to 2 black dorsocentral macrosetae; anatergal setae absent; a pair of yellow apical scutellar macrosetae; discal scutellar setae yellowish; katatergal macrosetae yellowish; setae on meron + metanepisternum yellowish.

Wing ( Fig. 31 ). Slightly infuscated (microtrichia), without costal dilation; bifurcation of veins R4 and R5 placed beyond apex of discal cell; crossvein r-m positioned medially on discal cell; microtrichia on posterior margin arranged in a single plane; halter yellow.

Legs. Fore and mid femora with basal 4/5 black, apical 1/5 brown; hind femur mostly black anteriorly, except for base and apex brown; all femora brown posteriorly; all tibiae with basal 4/5 yellow and apical 1/5 brown; first tarsomere of fore and mid legs yellow, remaining tarsomeres dark brown; first hind tarsomere brown, remaining tarsomeres dark brown. Fore and mid femora with yellow setae ventrally; mid femur with 2 yellow and 1 anterior black macrosetae, and 1 apical yellow macroseta posterodorsally; hind femur with 1 yellow and 2 black macrosetae anteriorly, and 5 anteroventral yellow macrosetae; fore tibia with 3 posterior yellow macrosetae; mid tibia with 4 posterior yellow macrosetae; hind tibia with 3 anterior black and 2 anteroventral yellow macrosetae; tarsomeres with black and yellow setae.

Abdomen ( Fig. 29 ). Tergites brown; tergites II–IV with marginal setae; sternites brown, gray tomentose; sternite VIII developed, fused only at base, forming two triangular projections with long, yellow setae ( Fig. 36 ).

Terminalia. Brown to dark brown ( Fig. 29 ); terminalia positioned perpendicular to abdomen ( Fig. 29 ); epandrium triangular apically, with small spiniform setae on inner surface ( Fig. 30, 32, 33 ); hypandrium with concavity on medial-apical margin ( Fig. 37 ); gonocoxite apex truncate, in lateral view ( Fig. 34 ); gonostylus long and narrow, with setae on apical half ( Fig. 34 ); ejaculatory apodeme wide ( Fig. 35 ); aedeagus with three short thin tubes; subepandrial sclerite with a protuberance medially.

Lengths: Body 11.8 mm; wing 7.5 mm.

Holotype condition. Pin running through right middle leg. Detached wing mounted on microslide in Canada balsam. Part of the abdomen and terminalia placed in microvial with glycerin.

Variation. Body size: 11.5 mm – 13 mm, wing size: 6.9 mm – 8.4 mm; 4 to 6 thick black ocellar macrosetae; 1 black and 1 yellow notopleural macrosetae; 1 yellow supra-alar macroseta; mid femur with 3 anterior yellow macrosetae; hind femur with 1 to 2 yellow and 1 to 2 black macrosetae anteriorly, 5 yellow anteroventral macrosetae; hind tibia with 2 to 3 black and 1 yellow macrosetae anteriorly; tergites I–IV black and tergites V–VIII brown; sternites brown.

Female. ( Figs. 38–40 ): Similar to male except for following: body length (14–16.3 mm), wing (8.7–8.9 mm); hind tibia with anteroventral black macroseta; mid and hind leg tarsomeres with black and yellow or only black setae; tergites I–VII brown to black, tergite and sternite VIII shiny dark brown; tergites II–III with marginal setae; sternite VIII less than twice length of tergite VII ( Figs. 38, 39 ); median sclerite at posterior end of furca (remnant of tergite IX) absent; genital fork long with narrow arms; three oval sclerotized capsules of spermathecae ( Fig. 40 ).

Etymology. This species is dedicated to Fernando Costa Vieira, father of the senior author.

Distribution. Guanacaste province, Costa Rica ( Fig. 41).

Material examined. Holotype: 3 Km NO[rte] de Nacaome, 100 m, P.[arque] N.[acional] Barra Honda, Prov.[íncia] Guan.[acaste], COSTA RICA, Mar.[zo] 1993. M. Reyes. L–N– 239000, 386000 [10°10'05"N 85°22'25"W] / Costa Rica, INBIO, CRI 000, 981939 / Martintella sp.1, det. E.M. Fisher 2000 / Holotype Martintella fernandoi (♂ INBIO). Paratypes: Same label data as holotype, except: CRI 001, 393068 / Paratype Martintella fernandoi (♂ INBIO); P.[arque] N.[acional] Barra Honda, Prov.[incia] Guan.[acaste], COSTA RICA, 100 m, Mar.[zo] 1994. M. Reyes. L N 239200_388500 [10°10'12"N 85°21'03"W], # 2786 / Costa Rica, INBIO, ORI 001, 762016 / Paratype Martintella fernandoi (♀ INBIO); Est.[acion] Palo Verde, 10 m, P.[arque] N.[acional] Palo Verde, Prov.[incia] Guan.[acaste], COSTA RICA, A. Gutierrez, 25 Mar. [zo] a 21 Abr. [il] 1992, L–N– 259000, 388400 [10°20'57"N 85°21'08"W] / Costa Rica, INBIO, CRI 000, 745406 / Paratype Martintella fernandoi (♀ INBIO); Est.[acion] Murcielágo, 8 km, S.O. de Cuajiniquil, Prov.[incia] Guan.[acaste], COSTA RICA, 80m, 18 Feb. [rero] – 25 Mar [zo] 1994, E. Araya, Malaise, L N 320300_347200 [10°54'07"N 85°43'52"W] #2832 / Costa Rica, INBIO, CRI 001, 788128 / Paratype Martintella fernandoi (♂ INPA); Ref. Nac.[ional] Fauna Silvestre Rafael Lucas Rodriguez, Palo Verde, 10m, Prov.[incia] Guan.[acaste], COSTA RICA, U. Chavarria, Abr.[il] 1991, L–N– 259000, 388400 [10°20'57"N 85°21'08"W] / Costa Rica, INBIO, CRI 000, 593897 / Paratype Martintella fernandoi (♀ INPA).

Discussion. Martintella aurata sp. nov. and M. fernandoi sp. nov. can be separated from other species in the genus by the morphological characteristics cited in the identification key and the diagnoses of these species. It is interesting that both new species were found in the same locality on the same date. Martintella lestes (type species of Martintella from Mexico) shows a preference for rather open, seasonally dry forest habitat. Such type of open forest habitat is generally uncommon in Costa Rica—except in western Guanacaste—where it is particularly well represented. The limited distribution so far shown by Martintella in Costa Rica seems likely to be due to habitat preference.

Figures

FIGURES 29 – 37. Martintella fernandoi sp. nov. Holotype ♂. 29. Habitus male, lateral view; 30. Male terminalia, dorsal view; 31. Wing; 32. Male terminalia, lateral view; 33. Male terminalia, ventral view; 34. Gonocoxite and gonostylus; 35. Aedeagus; 36. Sternite VIII; 37. Hypandrium. Abbreviations: aed: aedeagus; cerc: cercus; ej apod: ejaculatory apodeme; epand: epandrium; goncx: gonocoxite; goncx apod: gonocoxal apodeme; gonst: gonostylus; hypd: hypandrium; SVIII: sternite VIII.

FIGURES 38 – 40. Martintella fernandoi sp. nov. 38. Habitus female, lateral view; 39. Ovipositor, lateral view. 40. Capsule of spermathecae. Abbreviations: spmth: capsule of spermathecae; TVIII: tergite VIII; T IX + X: tergite IX + X.