Dasydorylas gibber, Ramos-Pastrana & Marques & Rafael, 2024

Ramos-Pastrana, Yardany, Marques, Dayse Willkenia A. & Rafael, José Albertino, 2024, Dasydorylas Skevington, 2001 (Pipunculidae, Tomosvaryellini) of Colombia, with description of three new species and a key to Neotropical males, European Journal of Taxonomy 932, pp. 138-157 : 144-146

Dasydorylas gibber sp. nov.

urn:lsid:zoobank.org:act:6813D205-09E6-432E-A976-0446F6DB3CC3

Figs 14–26 , 53

Diagnosis

Postpedicel with aristiform apex. Tergites 2–4 with distal margins yellowish brown pruinose; tergite 5 dark brown, brown pruinose dorsally, yellowish brown pruinose laterally. Surstyli subsymmetrical, equal to epandrium length; both surstyli thickened basally and medially, thin apically, with inner margins slightly straight, outer margins curved in dorsal view; right surstylus with apex truncated and left surstylus with apex slightly rounded when seen in lateral view. Apex of phallic guide with stout and rigid lobe dorsally and translucid lobes lateroapically in lateral view. Phallus trifid, with ejaculatory ducts distinctly separated only in distal fifth in lateral view.

Etymology

From the Latin ʻ gibber ʼ (= ʻhumpʼ), in reference to the shape of the lobe on the dorsal margin of the phallic guide in the male genitalia.

Type material

Holotype COLOMBIA – Boyacá • ♂; “ SFF[Santuario de Fauna y Flora] Iguaque , Cab.[Cabaña] Mamaramos ; 05°25′ N, 73°27′ W; 2855 m [eters]; 23.May [V]– 08.Jun [VI].2000; P. Reina leg.”; IAvH (photographed specimen). Holotype with left wing mounted on microslide with Canada balsam. Left antenna and terminalia placed in a microvial with glycerine, both pinned along with the specimen .

Description

Male (holotype)

MEASUREMENTS. Body length 4.8 mm, Wing length 5.8 mm.

HEAD ( Figs 14–15 ). Eyes contiguous for 19 facets. F, EM, V (mm) = 0.4, 0.4, 0.2. Frontal triangle dark brown, brown pruinose, with callus shiny dark brown. Occiput brown, brown pruinose.Antenna ( Fig. 16 ) scape brown, with one seta dorsally; pedicel dark brown, with four setae dorsally and two ventrally; postpedicel with aristiform apex. LPP/WPP = 5.6.

THORAX ( Figs 15, 17 ). Postpronotal lobe dark brown, brown pruinose, with four long setae along upper margin. Scutum, ground color brown, brown pruinose, with one spot black anteriorly and dorsocentral setae conspicuous. Notopleuron brown, gray-brown pruinose. Scutellum concolorous with scutum, with six long, stout and black setae in the posterior margin. Mesopleuron and mediotergite concolorous with notopleuron.

WING ( Fig. 18 ). Length 5.8 mm. LW/MWW = 3.2; LTC/LFC = 0.8. Membrane brown infuscated, vein M 1 slightly curved upward. Halter stem and knob completely beige ventrally, brown dorsally, except beige medial third of stem.

LEGS ( Figs 14–15 ). Coxae dark brown, gray-brown pruinose; fore trochanter brown; mid and hind trochanters brown, except brownish yellow distal third; femora dark brown, gray-brown pruinose, except brownish yellow apices, femora with conspicuous ctenidia and a row of long setae anterolaterally and posterolaterally; tibiae dark brown, with bases and apices brownish yellow; tarsomeres 1–5 yellowish brown; pulvilli brownish yellow.

ABDOMEN ( Figs 14–15, 19 ). Ground color velvety dark brown, with conspicuous scattered setae; tergite 1 completely brown pruinose, with four black and long setae laterally; tergites 2–4 with distal margins yellowish brown pruinose; tergite 5 dark brown, brown pruinose dorsally, yellowish brown pruinose laterally; tergites and sternites 6 and 7 as in Fig. 20 . Syntergosternite 8 brown, gray-brown pruinose, slightly shorter than tergite 5, with a membranous area apically ( Fig. 19 ).

TERMINALIA ( Figs 20–26 ). Epandrium and surstyli yellowish brown ( Fig. 21 ). Surstyli ( Figs 21–23 ) subsymmetrical, equal to epandrium length in dorsal view. Both surstyli thickened basally and medially, thin apically, with inner margins slightly straight, and outer margins curved in dorsal view; right surstylus thicker than left, with apex truncated; left surstylus with apex rounded ( Fig. 21 ); right surstylus with apex truncated; left surstylus with apex slightly rounded in lateral view ( Figs 22–23 ). Gonopods asymmetrical, right gonopod thicker than left in ventral view ( Fig. 24 ). Apex of phallic guide stout, with apex hook-shaped, with stout and rigid lobe dorsally and translucid lobes lateroapically in lateral view ( Fig. 25 ). Ejaculatory apodeme parasol-shaped ( Fig. 26 ). Phallus trifid, thin, with ejaculatory ducts distinctly separated only in distal fifth ( Fig. 25 ).

Female

Unknown.

Geographical distribution

Colombia (Boyacá) ( Fig. 53 ).

Habitat

The specimen was collected in the Santuario de Fauna y Flora Iguaque reserve, where the vegetation is composed of cloud Andean forests of the cordillera of the Northeast region of Colombia.

Remarks

Based on males and due to the shape of surstyli, D. gibber sp. nov. ( Fig. 21 ) is similar in appearance to D. colombiensis sp. nov. ( Fig. 8 ). It differs from D. colombiensis sp. nov. by having the tergite 1 completely brown pruinose, with four black and long setae laterally; tergites 2–4 with distal margins yellowish brown pruinose, tergite 5 dark brown, brown pruinose dorsally, yellowish brown pruinose laterally ( Figs 14–15, 19 ) (vs tergite 1–5 brown, brown pruinose, with distal margin gray pruinose dorsolaterally, interrupted medially, in D. colombiensis sp. nov.; Figs 1–2, 6 ); left surstylus with apex slightly rounded when seen in lateral view ( Fig. 22 ) (vs left surstylus with apex sinuous when seen in lateral view; Fig. 9 ); apex of phallic guide with a translucid lobe lateroapically and a stout rigid lobe dorsally in lateral view ( Fig. 25 ) (vs apex of phallic guide with upper margin slightly sinuous and a tuft of small setae centrally; Fig. 12 ); phallus with ejaculatory ducts distinctly separated only in distal fifth ( Fig. 25 ) (vs phallus with ejaculatory ducts distinctly separated only in distal half; Fig. 12 ).

Figures

Figs 14–26. Dasydorylas gibber sp. nov., ♂, holotype (IAvH). 14. Habitus, left lateral view. 15. Habitus, dorsal view. 16. Antenna. 17. Thorax, dorsal view. 18. Wing. 19. Abdomen, dorsal view. 20. Tergites and sternites 6 and 7, ventral view. 21. Terminalia, dorsal view. 22. Left surstylus, lateral view. 23. Right surstylus, lateral view. 24. Hypandrium and gonopods, ventral view. 25. Phallic guide and phallus, left lateral view. 26. Ejaculatory apodeme.

Fig. 53. Geographical records of species of Dasydorylas Skevington, 2001 in Colombia. Dasydorylas colombiensis sp. nov., D. gibber sp. nov., D. nigellus (Rafael, 1991) and D. santainesensis sp. nov.

Figs 1–13. Dasydorylas colombiensis sp. nov., ♂, holotype (IAvH–M1063). 1. Habitus, left lateral view. 2. Habitus, dorsal view.3. Antenna.4. Thorax, dorsal view. 5. Wing.6. Abdomen, dorsal view.7. Tergites and sternites 6 and 7, ventral view. 8. Terminalia, dorsal view. 9. Left surstylus, lateral view. 10. Right surstylus, lateral view. 11. Hypandrium and gonopods, ventral view. 12. Phallic guide and phallus, left lateral view. 13. Ejaculatory apodeme.