Paragrallomyia nodulosa, Ferro & Marshall, 2020

Ferro, Gustavo Borges & Marshall, Stephen A., 2020, A redefinition of Paragrallomyia Hendel (Diptera: Micropezidae, Taeniapterinae) and a revision of the P. albibasis complex, Zootaxa 4822 (1), pp. 39-70 : 57-58

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Paragrallomyia nodulosa

new species

Paragrallomyia nodulosa new species

( Figs. 31–34 View FIGURES 31–34 )

Description: Body length 6 mm; wing 4 mm. Head and abdomen dark brown, thorax black. Palpus dark brown except for white outer face. Clypeus dark brown with sparse pale microsetulae. First flagellomere dark brown. Fronto-orbital plate dark brown. Row of katepisternal setae brownish. Fore tibia dark brown. Fore tarsus mostly white, tarsomere one brown on basal quarter only. Hind femur mostly dark brown, narrowly white basally and with a small angled preapical white ring. Tergites dark brown. Oviscape mostly black, apex brown.

Head: First flagellomere covered by pale microsetulae. Frontal vitta with a large swollen velvety black spot anterior to ocellar plate ( Fig. 31 View FIGURES 31–34 ). Frontal vitta swollen anterior to ocellar plate. Epicephala merging immediately posterior to ocellar plate. Epicephalon flat, same level as frontal vitta.

Thorax: Mesonotum with lines of thin brownish microsetulae. Anterior half of postpronotal lobe bare. Femur covered with sparse black microsetulae. Mid and hind tibia almost cylindrical, sulcus on outer face weak. Female cervical sclerite brown and smooth, not swollen on posterior end. Cell r 4+5 open at the tip of the wing.

Female abdomen: Single spermathecal duct with an apical rounded swelling. Single spermatheca cylindrical, basally tapered and broadened on apical half with small finger-like appendices ( Fig. 32 View FIGURES 31–34 ). Paired spermathecal duct conspicuously broad apically before splitting into stems. Paired spermathecal duct stems tapered on basal third, swollen on apical half with finger-like processes apically. Paired spermathecae oval, invaginated apically only. Male abdomen: Copulatory fork with small inner basal lobes, less than half as long as the arms, arms long and curved ( Fig. 34 View FIGURES 31–34 ). Ejaculatory apodeme bigger than epandrium and with a broad blade, bigger than sperm pump. Phallapodeme short, not extending to anterior limit of hypandrium. Distiphallus longer than epandrium and phallic bulb somewhat cylindrical, length twice as width. Distal distiphallus short and thin, 1/4 of length and almost half of width of basal distiphallus.

Type material: Holotype: COSTA RICA. Puntarenas, Osa Peninsula 2.5 km S Rincon, ~ 50 m, 8º 42’ 1 N 83º30’50 W, 10–11.VIII.2001, S. A. Marshall (1 ♀, DEBU00168064 View Materials , MNCR) GoogleMaps . Paratypes: BELIZE. Mtn. Pine Ridge, 1000’ Falls area , jungle edge 2500’, 14.I.1991, S. A. Marshall (1 ♀, DEBU) ; COSTA RICA. Alajuela, Volcan Tenorio, N slope nr. Bijagua Biol. Sta. , 700 m, rain forest, 16–20. VI.2000, S. A. Marshall (2 ♀, DEBU00118469 View Materials , DEBU00118491 View Materials ) ; Alajuela, Volcan Tenorio, N slope, trail to laguna, 800–900 m, rain forest, 16–20. VI.2000, S. A. Marshall (2 ♀, DEBU00118548 View Materials , DEBU00118549 View Materials ) ; Heredia, La Virgen , 10 km SE, 10º20’N 84º 05’W, 450–550 m, 1º rainforest transect, 14–15.II.2003, M. Pollet (1 ♂, DEBU00241578 View Materials ) GoogleMaps ; Puntarenas, A. C. Osa, Bosque Esquinas, 200 m, V.1994, M. Segura coll. (1 ♀, INBIOCRI001999228, MNCR) ; Puntarenas, Corcovado Natl. Pk., San Pedrillo , 5-50 m, 8º 42’ 1 N 83º30’50 W, 13.VIII.2001, S. A. Marshall (1 ♀, DEBU00168165 View Materials , MNCR) GoogleMaps ; Puntarenas, Osa Peninsula 2.5 km S Rincon, ~ 50 m, 8º 42’ 1 N 83º30’50 W, 10–11.VIII.2001, S. A. Marshall (10 ♀, 1 ♂, DEBU00168046 View Materials , DEBU00168052 View Materials , DEBU00168066 View Materials , DEBU00168072 View Materials , DEBU00168080 View Materials , DEBU00168082 View Materials , DEBU00168085 View Materials , DEBU00168097 View Materials , DEBU00168240 View Materials , DEBU00168241 View Materials , DEBU00205736 View Materials ) GoogleMaps ; Puntarenas, Osa Pen. Corcovado Natl. Pk. Est. Agujas above Dos brazos, 500–600 m, 29–30.VIII.1996, Gustafsson, Pape, Viklung colls. (4 ♀, DEBU) ; San José, San Carlos, Riosparaiso Res., Pecari Stn. 16 km NNE Quepos, 400 m, 9º 33’ 53 N 84º7’32 W, 15.II.2003, S. A. Marshall (2 ♀, 1 ♂, DEBU00205697 View Materials , DEBU00205709 View Materials , DEBU00205731 View Materials ) GoogleMaps ; San José, Guaitil, nr. Bridge over Rio Candelaria , 9º46’19 N 84º12’56 W, 500 m, 12.IV.2006, S. A. Marshall (1 ♀, DEBU00260115 View Materials ) GoogleMaps ; San José, San Carlos, Riosparaiso Res., Pecari Stn. 16 km NNE Quepos, 400 m, 9º 33’ 53 N 84º7’32 W, 26.II.2006, S. A. Marshall (1 ♀, DEBU00206727 View Materials ) GoogleMaps ; San José, San Carlos, Riosparaiso Res., Pecari Stn. 16 km NNE Quepos, 400 m, 9º 33’ 53N 84º7’32 W, 15.II.2003, S. A. Marshall (1 ♂, DEBU00205708 View Materials ) GoogleMaps .

Distribution: Belize, Costa Rica.

Etymology: The specific name refers to the swollen dark spot anterior to the ocellar plate.

Comments: Paragrallomyia nodulosa is distinctive for the swollen black velvety spot anterior to the ocellar plate. The long and slightly curved arms of the copulatory fork and the single spermatheca with finger-like processes are also unusual.


Museo Nacional de Costa Rica


Ontario Insect Collection, University of Guelph


Mykotektet, National Veterinary Institute


Royal British Columbia Museum - Herbarium













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