Tachydromia iberica ( Arias, 1919 )

Gonçalves, Ana Rita, Grootaert, Patrick, Andrade, Rui, Paulo, Octávio S. & Mengual, Ximo, 2021, Revision of the morphology, phylogenetic relationships, behaviour and diversity of the Iberian and Italian ant-like Tachydromia Meigen, 1803 (Diptera: Hybotidae), European Journal of Taxonomy 732, pp. 1-56 : 23-26

Tachydromia iberica ( Arias, 1919)

Figs 1 , 6–8 16 A–B, 18 C–D

Pieltainia iberica Arias, 1919: 479 (male and female).

Tachydromia iberica Shamshev & Grootaert 2018: 425 (comb. nov.).

Diagnosis

Predominantly dark and glabrous. Wings, or any traces of it, absent. Palpi, proboscis and antennae black. Postpedicel subconical, 2 times longer than pedicel; stylus 2 times as long as scape, pedicel and postpedicel combined. Legs with dark brown to black and yellow colour pattern. Abdomen black, tergites and sternites mostly covered by grey microtrichia and by sparse, very short, setae; apical sternites with long, distinct, setae.

Type material (lost)

Holotype SPAIN • Huelva, Cala ; 22 Feb. 1915; C. Bolívar leg.

Paratypes SPAIN • several specimens; Segovia, San Rafael ; (spring) 1917; C. Bolívar leg.

Additional material (lost)

SPAIN • several specimens; Madrid, El Escorial ; C. Bolívar leg. • Cuenca, Ciudad Encantada; J.G. Collado leg.

Material examined

SPAIN • 12 ♂♂, 7 ♀♀ (all male terminalia studied, RBINS); Badajoz, Tentudía ; 38º03′16.17″ N, 6º20′14.7″ W; 3 Apr. 2015; A.R. Gonçalves and R. Andrade leg. • 5 ♂♂, 5 ♀♀; same collection data as for preceding; ZFMK • 8 ♂♂, 13 ♀♀ (all male terminalia studied, RBINS); Segovia, El Espinar ; 40º42′35.3″ N, 4º14′08.3″ W; 1 Apr. 2015; A.R. Gonçalves and R. Andrade leg. • 3 ♂♂, 4 ♀♀ (all male terminalia studied, RBINS); Madrid, Montejo de la Sierra, Prádena del Rincón ; 41°03′03.6″ N, 3°31′10.8″ W; 23 Apr. 2017; A.R. Gonçalves and P. Álvarez leg. • 3 ♂♂; Madrid, Montejo de la Sierra, Prádena del Rincón ; 41°02′40.8″ N, 3°29′28.7″ W; 23 Apr. 2017; A.R. Gonçalves and P. Álvarez leg. • 3 ♂♂, 9 ♀♀; Madrid, Arroyo de la Fuentecilla (La Hiruela); 41°04′18.0″ N, 3°27′28.2″ W; 23 Apr. 2017; A.R. Gonçalves and P. Álvarez leg. • 2 ♂♂, 1 ♀; Madrid, La Hiruela ; 41°04′59.3″ N, 3°25′45.3″ W; 23 Apr. 2017; A.R. Gonçalves and P. Álvarez leg. • 2 ♂♂, 1 ♀; Guadalajara, El Cardoso de la Sierra ; 41°05′46.2″ N, 3°28′56.1″ W; 23 Apr. 2017; A.R. Gonçalves and P. Álvarez leg. • 6 ♂♂ , 9 ♀♀; Madrid, Pinilla de Buitrago ; 40°57′02.0″ N, 3°43′11.6″ W; 24 Apr. 2017; A.R. Gonçalves and P. Álvarez leg. • 3 ♂♂ , 2 ♀♀; Madrid, Miraflores de la Sierra ; 40°50′24.4″ N, 3°48′24.4″ W; 24 Apr. 2017; P. Álvarez leg. • 4 ♂♂, 5 ♀♀; Madrid, Rascafría , Calle del Aguilón; 40°52′35.6″ N, 3°50′44.0″ W; 24 Apr. 2017; A.R. Gonçalves and P. Álvarez leg. • 5 ♂♂, 2 ♀♀; Madrid, Lozoya ; 40°58′07.9″ N, 3°48′01.6″ W; 24 Apr. 2017; A.R. Gonçalves and P. Álvarez leg. • 3 ♂♂, 5 ♀♀; Madrid, Miraflores de la Sierra (Fuente del Cura); 40°48′51.1″ N, 3°47′02.2″ W; 7 May 2017; P. Álvarez leg. • 5 ♂♂, 3 ♀♀; Madrid, Miraflores de la Sierra (Fuente del Cura); 40°49′19.2″ N, 3°47′21.5″ W; 7 May 2017; P. Álvarez leg.

PORTUGAL • 1 ♂, 2 ♀♀ (all male terminalia studied, RBINS); Porto de Mós , Arrimal; 39º31′54.6″ N, 8º52′20.7″ W; 9 Mar. 2014; A.R. Gonçalves leg. • 1 ♂; Leiria, Pombal , Cumieira; 39°53′33.5″ N, 8°35′53.6″ W; 18 Feb. 2017; S. Henriques leg.; NHMUK • 10 ♂♂, 12 ♀♀ (all male terminalia studied, RBINS); Porto de Mós , Arrimal; 39º31′54.6″ N, 8º52′20.7″ W; 11 Mar. 2017; A.R. Gonçalves and F. Barros leg. • 4 ♂♂, 5 ♀♀; Leiria, Pombal , Cumieira; 39°53′33.5″ N, 8°35′53.6″ W; 18 Mar. 2017; A.R. Gonçalves and J. Rosete leg. • 3 ♂♂, 7 ♀♀; Porto de Mós, Arrimal ; 39º31′54.6″ N, 8º52′20.7″ W; 8 Apr. 2018; A.R. Gonçalves, S. Martins and F. Barros leg. • 15 ♂♂, 13 ♀♀; Porto de Mós, Arrimal ; 39º31′54.6″ N, 8º52′20.7″ W; 16 Apr. 2018; A.R. Gonçalves, S. Martins and F. Barros leg. • 4 ♂♂, 6 ♀♀; Porto de Mós ; 39°31′56.53″ N, 8°52′17.86″ W; 16 Apr. 2018; A.R. Gonçalves, S. Martins and F. Barros leg. • 1 ♂; Porto de Mós ; 39°33′52.41″ N, 8°49′13.07″ W; 16 Apr. 2018; A.R. Gonçalves, S. Martins and F. Barros leg. • 2 ♂♂, 3 ♀♀; Porto de Mós ; 39°32′20.18″ N, 8°49′22.41″ W; 16 Apr. 2018; A.R. Gonçalves, S. Martins and F. Barros leg. • 2 ♂♂, 2 ♀♀; Porto de Mós ; 39°30′37.37″ N, 8°50′3.13″ W; 16 Apr. 2018; A.R. Gonçalves, S. Martins and F. Barros leg. • 1 ♂, 2 ♀♀; Porto de Mós ; 39°26′16.57″ N, 8°55′6.93″ W; 16 Apr. 2018; A.R. Gonçalves, S. Martins and F. Barros leg.

Redescription

Similar to Tachydromia cantabrica sp. nov. except for the following:

Male

MEASUREMENTS. Body length: 1.9–2.5 mm (n = 5).

HEAD. Ocellar tubercle glabrous, shiny black. Lateroclinate ocellars ca ½ smaller than length of postpedicel. Proclinate verticals ca ⅔ shorter than length of postpedicel.

ANTENNA. Postpedicel 2 times as long as pedicel.

PALPUS. Less numerous setae present ventrally with a few distinct setae.

THORAX. Scutellum almost undistinguishable and postscutellum poorly developed. Postpronotal lobe with ca 8 setae laterally, ca 8 acrostichal setae, irregular biseriate, of equal length, and 6 similar other setae placed irregularly; notopleuron with 2 setae; 2 setae near mesothoracic spiracle; 2 long, incurvated prescutellar setae; scutellar setae absent.

WING. Absent.

LEGS. Dark brown to black with following yellow: trochanters, apical half of fore and mid femora, dorsal surface and basal ½ of fore and mid tibiae, most of tarsomeres 1 and 2, except for black apical margin. Ciliation of hair-like setae absent from fore tibia. Spur absent.

ABDOMEN. Tergites and sternites with very short, sparse setae, except for apical sternites with longer, distinct setae.

TERMINALIA ( Figs 6–8 ). Right surstylus long, mostly glabrous, except for stronger setae on dorsal and distal margins. Right epandrial lamella with long, irregularly placed setae on apical ½. Cerci with long setae of unequal length mostly placed on apical ½, Left epandrial lamella ½ shorter than left cercus, deeply bilobed. Left surstylus almost twice as long as wide, ½ shorter than cerci.

Female

Except for terminalia, no distinguishing features between sexes. Cerci pale brown with grey microtrichia and setae.

Variability

Main sources of variability are related to leg colouration, number of prescutellar setae and shape of right surstylus. In all populations, it is possible to find specimens with dark tarsi, instead of yellow. Regarding the right surstylus, in the southern population, this structure is usually long, narrowing distally ( Fig. 6 ); in the Spanish central system, specimens usually have a very short, sub-triangular, right surstylus ( Fig. 7 ); the Portuguese specimens, often have a very long and narrow surstylus ( Fig. 8 ). However, it is possible to find variability concerning the shapes of right surstylus within the same population. Concerning the number of prescutellar setae, the usual number is 2 setae, but in all populations analysed it is possible to observe specimens with several prescutellar setae (ca 6).

Distribution

Spain and Portugal. It is known from the Serranía de Cuenca in eastern Iberia, Guadarrama mountains in the centre, in the foothills of the Sierra Morena mountains in the south, and in the Portuguese provinces of Beira Litoral and Estremadura in the west.

Figures

Fig. 1. Currently known distribution of the Iberian ant-like Tachydromia Meigen, 1803. Each dot represents a presence point, with each colour corresponding to a different species. When two species co-occur in the same area, their presence is represented by a smaller dot on top of a dot of regular dimension, each of those with the colour corresponding to the co-occurring species. The dots surrounded by a black circle with a vertical line represent localities previously known.

Fig. 6. Terminalia ofTachydromia iberica (Arias, 1919) from Spain, Madrid (RBINS). A. Right surstylus and right epandrial lamella. B. Epandrium with cerci. C. Left epandrial lamella and left surstylus. D. Right surstylus. Scale bar: 0.1 mm.

Fig. 7. Terminalia of Tachydromia iberica (Arias, 1919) from Spain, Segovia, El Espinar (Central System) (RBINS). A. Right surstylus and right epandrial lamella. B. Epandrium with cerci. C. Left epandrial lamella and left surstylus. D. Right surstylus. Scale bar: 0.1 mm.

Fig. 8. Terminalia of Tachydromia iberica (Arias, 1919) from Portugal, Leiria, Porto de Mós (RBINS). A. Right surstylus and right epandrial lamella. B. Epandrium with cerci. C. Left epandrial lamella and left surstylus. D. Right surstylus. Scale bar: 0.1 mm

Fig. 9. Terminalia of the holotype of Tachydromia lusitanica (Grootaert, Shamshev & Andrade, 2009) from Portugal, Braga, Gilmonde (RBINS). A. Right surstylus.B. Epandrium with cerci.C. Left epandrial lamella and left surstylus. Figure adapted from Grootaert et al. 2009.

Fig. 10. Terminalia of Tachydromia nigrohirta Gonçalves, Grootaert & Andrade sp. nov., holotype (RBINS). A. Right surstylus and right epandrial lamella. B. Epandrium with cerci. C. Left epandrial lamella and left surstylus. D. Right surstylus. Scale bar: 0.1 mm.

Fig. 11.Terminaliaof thetopotypeofTachydromia pandellei(Séguy, 1941)from France, Hautes-Pyrénées, Arrens-Marsous, lectotype (RBINS). A. Right surstylus and right epandrial lamella. B. Epandrium with cerci. C. Left epandrial lamella and left surstylus. D. Right surstylus. Scale bar: 0.1 mm.

Fig. 12. Terminalia of Tachydromia pieltaini (Gil Collado, 1936) from Spain, Asturias, Covadonga (RBINS). A. Right surstylus and right epandrial lamella. B. Epandrium with cerci. C. Left epandrial lamella and left surstylus. D. Right surstylus. Scale bar: 0.1 mm.

Fig. 13. Terminalia of Tachydromia semiaptera (Gil Collado, 1923) (RBINS). A. Right surstylus and right epandrial lamella. B. Epandrium with cerci. C. Left epandrial lamella and left surstylus. D. Right surstylus. Scale bar: 0.1 mm.

Fig. 14. Terminalia of Tachydromia stenoptera Gonçalves, Grootaert & Andrade sp. nov., holotype (RBINS). A. Right surstylus and right epandrial lamella. B. Epandrium with cerci. C. Left epandrial lamella and left surstylus. D–E. Right surstylus. Scale bar: 0.1 mm.

Fig. 15. Habitus of live specimens of the Iberian ant-like Tachydromia Meigen, 1803. Males are pictured in the left column, females in the right. A–B. T. lusitanica (Grootaert, Shamshev & Andrade, 2009). C–D. T. nigrohirta Gonçalves, Grootaert & Andrade sp. nov. E–F. T. ebejeri Gonçalves, Grootaert & Andrade sp. nov. G–H. T. stenoptera Gonçalves, Grootaert & Andrade sp. nov. I–J. T. cantabrica Gonçalves, Grootaert & Andrade sp. nov.

Fig. 16. Habitus of live specimens of the Iberian ant-like Tachydromia Meigen, 1803 and the Italian flightless Tachydromia. Males are pictured in the left column, females in the right.A–B. T. iberica (Arias, 1919). C–D. T. semiaptera (Gil Collado, 1923). E–F. T. pieltaini (Gil Collado, 1936). G–H. T. pandellei (Séguy, 1941). I–J. T. apterygon Plant & Deeming, 2006 (Italy).

Fig. 18. Mounted specimens of the Iberian ant-like Tachydromia Meigen, 1803. Males are pictured in the left column, females in the right. A–B. T. cantabrica Gonçalves, Grootaert & Andrade sp. nov. C–D. T. iberica (Arias, 1919). E–F. T. semiaptera (Gil Collado, 1923). G–H. T. pieltaini (Gil Collado, 1936). I–J. T. pandellei (Séguy, 1941). Scale bars: 1 mm.