Damselflies of the genus Argia (Odonata: Coenagrionidae) from Ecuador with descriptions of five new species Garrison, Rosser W. Ellenrieder, Natalia Von Zootaxa 2018 2018-09-03 4470 1 1 69 9X237 Garrison & von Ellenrieder Garrison & von Ellenrieder 2018 [151,707,1309,1335] Insecta Coenagrionidae Argia Animalia Odonata 33 34 Arthropoda species tennesseni sp. nov.   Figs. 22(head, thorax, S1– 3 ♂), 33 (head, thorax, S1– 3 ♀), 57, 58 (S8– 10 ♂), 68 (S7– 10 ♀), 84 (mesostigmal plates ♀), 101 (genital ligula), 121 (appendages ♂), 127 (wings, ♂), 138, 141 (map), 150, 151 (photos).   Etymology. Named  tennesseni(Latinized name) in honor of our friend and colleague Kenneth J. Tennessen who first brought this interesting species to our attention.  Types.  Holotype ♂: ECUADOR, Orellana Prov.: stream 8.5 kmeast of Loreto, 0°37'6" S, 77°17'42" W,  360 m,  14 September 1997, Kenneth J. Tennessenleg. [ FSCA].  Specimens examined(all paratypes).  17 ♂♂, 26 ♀♀. ECUADOR:  Sucumbios Prov.: 1 ♀, Limoncocha, forest stream ( 0°24' S, 76°36' W,  300 m),  1 March 1972, David L. Pearsonleg. [ DRP]; same data but 1 ♂,  6 March 1972[ DRP]; same data but 1 ♂,  9 March 1972[ DRP];  Orellana Prov.: 1 ♂, 2 ♀♀,  12 kmNE of Loreto, stream ( 0°37'18'' S, 77°15'36'' W,  370 m),  15 October 2009, Kenneth J. Tennessenleg. [ FSCA]; same data but 1 ♂, 2 ♀♀,  12.5 kmNE of Loreto,  12 October 2009[ FSCA]; same data but 1 ♂,  12.5 kmNE of Loreto(reared; adult in ETOH) [ FSCA]; 1 ♀, Yasuni National Park, stream on road to Waorani Reserve, 1.8 kmwest of Waorani Reserve Road, on  Markus Oil Co.Road PC29-30, small stream ( 0°42' S, 76°28' W,  200 m),  16 November 1997, William F. Mauffrayleg. [ FSCA]; 2 ♂♂, 1 ♀, same data but stream on road to Waorani Reserve, 6.2 kmsouth of main Yasuni Road( 0°42'43'' S, 76°28'28'' W,  230 m),  10 June 1995, Kenneth J. Tennessenleg. [ FSCA]; same data but 1 ♂[ RWG]; 1 ♀, Scientific Research Station, Yasuni National Park, stream at km 29 on Yasuni Road, 20.5 kmnorth of station, Collected under Permit No.027 1C INEFAN/DNANVS { 0°34'8'' S, 76°30'59'' W,  220 m},  11 June 1995, Sidney W. Dunkleleg. [ RWG]; 1 ♀, small stream ca 12 kmnorth of  Loreto, route E20 ( 0°37'18'' S, 77°15'36'' W,  367 m),  3 November 2013, Kenneth J. Tennessenleg. [ RWG]; 1 ♂, 3 ♀♀, same data but [ FSCA]; 1 ♂, small stream west of Coca(north of route E20) ( 0°27'45'' S, 77°8'10'' W,  282 m),  30 October 2013[ FSCA]; 1 ♂, 1 ♀, Tiputini Biodiversity Station( 0°38' S, 76°9' W,  220 m),  20 September 2000, Kelly Jackson, D. Inwardleg. [ BMNH]; same data but 1 ♀[ RWG]; 1 ♀, Tiputini Biodiversity StationUSFQ, black water stream crossing Guacamayo trail at marker 2050 ( 0°38'18'' S, 76°8'57'' W),  17 January 2009, R.W. Garrison& N. von Ellenriederleg. [ CSCA]; 1 ♀, same data but [ RWG]; 1 ♀, Tiputini Biodiversity StationUSFQ, Guacamayotrail between markers 450–2100 ( 0°38'6'' S, 76°9'12'' W,  237 m),  22 January 2009[ RWG]; 1 ♀, Tiputini Biodiversity StationUSFQ, stream crossing Chorongotrail at marker 225 ( 0°38'6'' S, 76°9'1'' W,  220 m),  16 January 2009[ CSCA]; 1 ♂, 3 ♀♀, same data but [ RWG]; 1 ♀, same data but  18 January 2009[ CSCA]; 1 ♂, 2 ♀♀, same data but [ RWG]; 1 ♀, Tiputini Biodiversity StationUSFQ, stream crossing Matapalotrail at marker 450 ( 0°38'13'' S, 76°8'45'' W,  245 m),  14 January 2009[ RWG]; 1 ♂, Tiputini Biodiversity Station, near Yasuni National Park, Canopyfogging project, Lot#1908, TR1 #9, terra firme forest ( 0°37'55'' S, 76°8'39'' W,  220 m),  23 October 1999, Terry L. Erwin et. alleg. [ USNM];  Napo Prov.: 1 ♂, Cotopino River(?between Napoand Aguaricos) { 1°0' S, 78°42' W,  400 m},  14 March 1950, William Clarke-Macintyreleg. [ UMMZ].  PERU, Loreto Reg.: 1 ♂, Yurimaguas{ 5°53'49'' S, 76°6'53'' W,  140 m},  March 1940, Guillermo G. Klugleg. [ UMMZ].  BRAZIL, Acre State: 1 ♂, Igarapéda  Mato Grosso, 5 kmnorth of Tejo River{ 8°13'0'' S, 71°41'0'' W,  240 m},  6 July 1993[ FSCA]. A dark medium-sized sexually dimorphic species with male thorax larger and bulkier than in other  Argiaspecies, heavily infumated wings ( Fig. 127) and male epiproct confluent with torifer ( Fig. 121b, c).   Description of male holotype. Head as in Fig. 22, entirely matte black except for following dark brown areas: base of mandibles, genae and base of labrum, epicranium with small pale spot anterolateral to lateral ocellus, and large violaceous postocular spot laterally not confluent with eye; occipital bar black, rear of head entirely black. Prothorax entirely black with slight metallic luster; synthorax as in Fig. 22, mostly black with an inverted wedge-shaped violaceous purple antehumeral stripe adjacent to humeral suture, its base about 0.20 as wide as black middorsal stripe; mesepimeron and mesinfraepisternum matte black, a narrow orange brown mesopleural stripe followed by a broad matte black metapleural stripe, posterior portion of metepimeron orange brown, its posterior border black, venter of thorax mostly black with ill-defined orange-brown spot medially. Wings infumated with brown, venation black; pterostigma dark brown, surmounting 2.0 cells in all wings; postnodals Fw 19/19, Hw 17/17; postquadrangular cells Fw 5/5, Hw 4/4; RP 2at Fw 7.5/7.5, Hw 6/6. Coxae black washed with orange-brown on posterior margins, trochanters and remainder of legs and armature black. Abdomen (as in Fig. 22, Fig. 57) mostly black; S1 black with an ill-defined orange-brown lateral spot; S2 entirely black with a small ill-defined lateral black spot above lateral margin; S3–7 black with a wash of brown at basal ring, S8 black except for violaceous dorsal spot at apical sixth, S9 violaceous dorsally, black laterally, S10 black except for narrow transverse violaceous dorsal spot at apical half (Fig. 57); torus brown, remainder of torifer, epiproct and appendages black. Genital ligula ( Fig. 101), lacking microspinulate patch on ental surface proximal to flexure on sclerotized area; distal segment largely membranous armed basally with a curved sclerotized flagellum and laterally with a semitransparent glabrous parallel-sided lobe. Torus small, transversely oval, swollen, occupying outer half of torifer ( Fig. 121b); epiproct bilobed with apical margin forming a raised ridge, confluent laterally and anteriorly with torifer thus forming a largely transverse triangular plate ( Fig. 121b); cercus ( Fig. 121a, c) subequal in length to paraproct, robust, slightly longer than wide, swollen basally divided apically with outer branch narrowing distally and in mediodorsal view, with concave ventral surface; inner branch a slightly recesses robust decumbent conical tooth best seen in mediodorsal view ( Fig. 121c); paraproct bilobate, almost quadrate in lateral view with upper and lower branches broadly divided, their tips bluntly triangular, small and both approximately the same size ( Fig. 121a).  Dimensions. Hw 21.5, abdomen 28.0, total length 32.0.  Description of female paratype( Ecuador: Orellana Prov., Yasuni National Park, stream on road to Waorani Reserve, 6.2 kmsouth of main Yasuni Road). Head (as in Fig. 33) entirely black with a small ivory white spot on gena confluent with eye margin, a small diagonal spot anterolateral to median ocellus and a tan postocular spot not confluent with eye margin; rear of head entirely black. Prothorax matte black except for narrow orange transverse stripe on anterior lobe and ventral margin of propleuron; synthorax as in Fig. 33, mostly black with narrow orange antehumeral stripe gradually narrowing dorsally, adjacent to humeral suture, its base about one fifth as wide as black middorsal stripe; mesepimeron and mesinfraepisternum matte black, an orange brown mesopleural stripe as broad matte black metapleural stripe, posterior portion of metepimeron orange brown, its posterior border washed with brown, venter of thorax mostly light brown. S1 black with a pale orange lateral spot; S2 black with ventral margin washed with orange brown; remainder of abdomen including ovipositor and cercus black (as in Fig. 68). Mesostigmal lobe small, forming a slightly raised gently arcuate lobe confined to medial half of mesostigmal plate, area immediately behind obsolete posterior margin of mesostigmal plate unmodified ( Fig. 84).  Variation in paratypes. The purple antehumeral stripe in male varies in size and is completely absent in the male from Brazil. The pale lateral spot on S 10 inmale ranges from present as in holotype(Fig. 57) to very small (1.0 km NW Lita, Fig. 58). Pterostigma surmounting 1–2 cells in males, 1 infemale; postnodals: Fw 16–18 inmales, 12– 12 infemale, Hw 14–16 inmales, 10– 10 infemale; postquadrangular cells Fw 3–5, Hw 3–4 inmales, Fw 3–3, Hw 3– 3 infemale; RP 2at Fw 7–9, Hw 6–7 inmales, Fw 6–6, Hw 4– 4 infemale. Dimensions. ♂: Hw 20.9 ± 1.09 [19–22.3], abdomen 27.3 ± 1.22 [25.7–29.3], total length 35.2 ± 1.51 [33.3–37.8]; ♀: Hw 20.5, abdomen 25.0, total length 31.5.   Diagnosis. Male unlike any of other species of  Argia. Robust thorax, inverted wedge-shaped violaceous purple antehumeral stripe (when present) contrasting with orange brown lateral thoracic stripes (as in Figs. 22, 150), heavily infumated wings, supernumerary postquadrangular cells (as in Fig. 127, shared with  A. philipi) and morphology of the male caudal appendages ( Fig. 121) coupled with torifer confluent with epiproct are unique to this species. Female easily distinguished by orange-brown pale coloration coupled with the supernumerary postquadrangular cells. Within its range, female may be confused only with female of  Argia difficilisSelys( Fig. 138) but in the female of that species pale areas are violaceous (orange brown in  A. tennesseni), there are fewer postquadrangular cells (generally 4 inFW, 3 inHW in  A. difficilis; generally 5 inFW, 4 inHW in  A. tennesseni), and wings are hyaline (infumated in  A. tennesseni).   Remarks.Little variation was observed among paratypes. One male ( Brazil: Acre State, Igarapé da Mato Grosso, 5 kmnorth of Tejo River) lacked the violaceous antehumeral stripe. Some females possess a small orange spot above the propleuron, pale lateral (mesopleural and metapleural) stripes in some males and females appear to be dull blue or olive-green as is shown for a pair labeled as  Argiasp. K at the Dragonflies and Damselflies of Ecuador( Odonata) website (http://bdei2.cs.umb.edu/~whaber/ Odonata_of_ Ecuador/index.html) managed by Bill Haber and David Wagner. Males often lack the small pale spot on S8 (Fig. 58) present in the holotype(Fig. 57). This species is remarkable in being sexually dimorphic; male thorax is uniquely robust reminiscent of some species of the Papuan genus  PalaiargiaFörster, and is comparatively larger and bulkier ( Figs. 22, 150) than in the female ( Fig. 33, 151).  Habitat. Confined to small, mostly shaded creeks in jungle understory. At the Tiputini Biodiversity Station in January, 2009, we observed adults in company with  A. difficilis Selys. Both species were collected while perching on leaves exposed to sunlight in deep forest. Fewer males of  A. tennesseniwere seen compared to females. We observed (and photographed) an unaccompanied female ovipositing on a partially submerged twig in a small creek. A male in poor condition was collected by Terry Erwin during a canopy fogging project at Tiputini in October, 1999, indicating that this species may roost in the canopy. The species is apparently a denizen of small mostly shaded streams in Amazonian regions of Ecuador, Peruand western Brazil.   Distribution. Thus far known from Napo, Orellanaand Sucumbiosprovinces of eastern Ecuador( Fig. 138), Loreto Regionin Peruand Acre Statein Brazil( Fig. 141). 2608960751 1997-09-14 FSCA Kenneth J. Tennessen Ecuador 360 -0.61833334 Loreto 21 -77.295 33 34 1 1 Orellana holotype 2608960767 [628,949,1596,1621] Ecuador ECUADOR 33 34 43 26 17 2608960779 1972-03-01 1972-03-09 1972-03-01 DRP David L. Pearson Ecuador 300 -0.4 Limoncocha 1308 -76.6 33 34 3 1 2 Sucumbios 2608960769 1995-06-10 2009-10-15 1995-06-10 FSCA, RWG Kenneth J. Tennessen & Markus Oil Co. Road PC & William F. Mauffray & Yasuni Road & Permit No. & Sidney W. Dunkle Ecuador Markus Oil Co. 370 -0.5688889 Waorani Reserve 21 -76.51639 Yasuni National Park 33 34 14 8 6 Orellana 2608960777 1999-10-23 2013-11-03 1999-10-23 RWG, FSCA, BMNH, CSCA, USNM Kenneth J. Tennessen & Kelly Jackson, D. & Inward & R. W. Garrison & N. von Ellenrieder & Guacamayo & Chorongo & Matapalo & Canopy & Lot & Terry L. Erwin Ecuador Coca 367 34 35 -0.6319445 Tiputini Biodiversity Station 21 -76.144165 Tiputini Biodiversity Station 33 34 22 16 6 Loreto 2608960756 1950-03-14 UMMZ William Clarke-Macintyre Ecuador 400 -1.0 Aguaricos 1308 -78.7 Cotopino River 34 35 1 1 Napo 2608960787 1940-03 UMMZ Guillermo G. Klug Peru 140 -5.8969445 Yurimaguas 21 -76.11472 Reg. 34 35 1 1 Loreto 2608960755 [616,1048,655,680] Igarape Brazil Acre State 34 35 1 1 Acre 2608960778 1993-07-06 FSCA Brazil 240 -8.216666 Tejo River 21 -71.683334 34 35 1 Mato Grosso