Systenus colombiensis, Ramos-Pastrana & Merchan-Vargas & Soares, 2024
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publication ID |
https://doi.org/ 10.11646/zootaxa.5514.3.3 |
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publication LSID |
lsid:zoobank.org:pub:D745608E-E51C-401E-A1A1-3573A24C51BD |
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persistent identifier |
https://treatment.plazi.org/id/03A71175-FFCE-3C6A-CB96-6B378663FE25 |
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Plazi |
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scientific name |
Systenus colombiensis |
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sp. nov. |
Systenus colombiensis sp. nov.
( Figs 2 View FIGURE 2 , 7 View FIGURE 7 )
Diagnosis. Antenna mostly dark brown, except ventral edge of scape and pedicel and dorsal and ventral edges of postpedicel at basal 1/3 orangish yellow ( Fig. 2A, B View FIGURE 2 ). Postpedicel abruptly narrowed at apical 2/3, 4X longer than the highest point ( Fig. 2B View FIGURE 2 ). Metepimeron brown ( Fig. 2A View FIGURE 2 ). Legs yellow, except basal 2/3 of coxae II and III, It 5 and IIt 5 and tarsus III from apex of IIIt 1 brown ( Fig. 2A View FIGURE 2 ). Wing hyaline ( Fig. 2D View FIGURE 2 ). Surstylus slightly shorter than cercus and epandrial capsule, wide basally and abruptly narrowed at apical 1/3, with 2 long, acute digitiform processes, 1 basodorsal and 1 at apical 1/3 of ventral edge, apex of surstylus slightly curved ventrally ( Fig. 2F View FIGURE 2 ).
Description. Male ( Fig. 2 View FIGURE 2 ). Body length: 2.4 mm; wing 2.2 mm. Head ( Fig. 2A, B View FIGURE 2 ). Similar to S. bickeli sp. nov. except as noted: Palpus yellow with short whitish yellow setae at apical 1/2. Proboscis pale brown. Antenna mostly dark brown, except ventral edge of scape and pedicel and dorsal and ventral edges of postpedicel at basal 1/3 orangish yellow; postpedicel abruptly narrowed at apical 2/3, 4X longer than widest point; arista-like stylus short, about 1/3 as long as postpedicel. One pair of strong divergent ocellar setae and 1 pair of tiny postocellar setae; 1 pair of strong proclinate vertical setae; 1 pair of paravertical about 1/2 as long as vertical setae; one row of postocular, uppermost 3 black, remaining setae pale brown; postcranium metallic green covered by silvery pruinosity. Thorax ( Figs 2A, C View FIGURE 2 ). Chaetotaxy. Lower surface of proepisternum with 1 yellow whitish strong seta and upper surface with 1 thin seta. Legs ( Fig. 2A View FIGURE 2 ). Yellow, except basal 2/3 of coxae II and III, It 5 and IIt 5 and tarsus III from apex of IIIt 1 brown. Leg I. Podomere ratios: 63, 59, 27/14/10/8/6. Anterior surface of coxa I covered by short vestiture of yellow setae, apical edge with 5 long yellow setae. Femur I and tibia clothed by short vestiture of yellow setae, femur I with ventral surface of basal 1/2 mostly bare. Leg II. Podomere ratios: 75, 70, 35/27/21/15/8. Anterior surface of coxa II covered by short vestiture of yellow setae, longer at apical edge. Femur II mostly clothed by short vestiture of yellow setae, basal 1/2 of ventral surface mostly bare. Tibia II with 3 pairs of antero- and posterodorsal setae at 2/6, 4/6 and apex, 1 ventral seta at apex. Leg. III. Podomere ratios: 80, 93, 17/40/25/20/9. Lateral surface of coxa III with 1 strong yellow seta near middle. Femur III mostly clothed by short vestiture of yellow setae, basal 1/2 of ventral surface mostly bare. Tibia III with 1 posterodorsal seta at basal 1/4, with row of strong dorsal setae starting at basal 1/4 and extending to apical 3/4. Wing ( Fig. 2D View FIGURE 2 ). Hyaline, veins pale brown. Crossvein dm ending at basal 5/8; R 4+5 and M 1 slightly bowed at apical 6/8, ending parallel at apex; length of crossvein dm-m/last part of M 4 (“CuAx ratio”): 0.9. Abdomen ( Fig. 2E View FIGURE 2 ). Mostly metallic green, covered by short vestiture of black setae, tergite 1 with long setae at posterior margin, tergite 2–5 with dorsal and lateral brown bands. Hypopygium ( Fig. 2F View FIGURE 2 ). Surstylus slightly shorter than epandrial capsule, wide basally and abruptly narrowed at apical 1/3, with 2 long, acute digitiform processes, 1 basodorsal and 1 at apical 1/3 of ventral edge, apex of surstylus slightly curved ventrally, with 1 ribbon-like seta, 1 long, slender seta at middle of ventral edge. Epandrial lobe as wide as surstylus at widest point, gradually narrowed towards apex, apex curved upward, with 2 long setae, 1 basally and 1 apically. Cercus yellow, long and narrow, about 1.5X longer than surstylus, with rounded swollen base and covered by short yellow setae.
Female. Unknown. Type material. HOLOTYPE ♂,labelled:“ COLOMBIA, Caquetá, Montañita,Vda.[Vereda] Morros ,Fca.[Finca]
Las Dalias, 01º29’24’’N / 75º24’09’’W, 348 m, 29.III–09.IV.2017 / Trampa Malaise en Bosque (Suelo), Y. RamosPastrana Leg. ( LEUA)” (photographed specimen). PARATYPE: “ Idem, Belén de los Andaquíes, Vda.[Vereda] GoogleMaps
Aletones, Fca. [Finca] La Cabaña, 01º29’31’’N / 75º52’20’’W, 369 m, 26.X–03.XI.2016 / Trampa Malaise en Bosque (Dosel) (1 ♂, LEUA)”. Holotype condition: good, abdomen dissected and stored in microvial with glycerin. GoogleMaps
Distribution. Colombia (Caquetá: Montañita) ( Fig. 7 View FIGURE 7 ).
Remarks. Systenus colombiensis sp. nov. runs to S. rarus Naglis in the key of Naglis (2000) and to S. flavifemoratus Bickel in the key of Bickel (2015) but can be differentiated from both species by the surstylus with two surstylar processes and only abruptly narrowed at apical 1/3 (one surstylar process and surstylus abruptly narrowed at apical 1/ 2 in S. rarus and S. flavifemoratus ).
Etymology. The name of the new species refers to Colombia, where the type series has been collected.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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