Mesamphiagrion occultum (Ris, 1918)

Bota-Sierra, Cornelio Andrés & Echeverri, Martha Isabel Wolff, 2013, Taxonomic revision of Mesamphiagrion Kennedy, 1920 from Colombia (Odonata: Coenagrionidae), with the description of four new species, Zootaxa 3718 (5), pp. 401-440 : 433-434

publication ID

https://dx.doi.org/10.11646/zootaxa.3718.5.1

publication LSID

lsid:zoobank.org:pub:A34FF647-288B-4BD6-803C-0EADB27F2BC3

DOI

https://doi.org/10.5281/zenodo.5658569

persistent identifier

https://treatment.plazi.org/id/E76CC555-D03D-FFCF-FF61-5E4DF25EFAD9

treatment provided by

Plazi

scientific name

Mesamphiagrion occultum (Ris, 1918)
status

 

Mesamphiagrion occultum (Ris, 1918)

Figs. 10 View FIGURE 10 e (pronotum and mesostigmal plates ♀), 10 i (habitus ♀), 13 i –j (S 7– 10 ♂), 14m –n (S 7–10 ♀); 15 (map)

Enallagma occultum Ris 1918: 118 –120, fig. 60 (description of male, illustration of male S 10);—De Marmels 1989: 246–248, figs. 9–14 (generic characterization, description, and illustration of diagnostic characters).

Mesamphiagrion occultum Kennedy 1920: 87 (diagnosis);—Davies 1981: 6 (generic listing with type species listed);—Davies & Tobin 1984: 75 (synonymic list);—De Marmels 1989: 248–250, figs. 9–14 (description and illustrations);—De Marmels 1990 a: 74, fig 1 (rediscovery, brief description and illustration);—Garrison 1991: 13 (synonymic list);—Bridges 1994: VII. 171 (synonymic list);—Moore 1997: 16 (IUCN conservation plan);—Steinmann 1997: 278 (synonymic list);—Tsuda 2000: 39 ( Colombia);—Heckman 2008: 319, fig. 363 (keys for adults);—von Ellenrieder & Garrison 2008: 1–51, figs. 7 c, 15, 38, 60, 70, and 80 (in part, key, map, and illustrations);—Garrison et al. 2010: 275–279, figs. 1728, 1731, 1746, 1747, 1764, 1765 (in part, synonymic list, and illustrations);—Pérez-Gutiérrez & Palacino-Rodríguez 2011: 213 (Colombian species check list).

Specimens examined (seven specimens). Cundinamarca: ICN: 1 ♂, Municipality Tena, ca 4 ° 39 ’N 74 ° 23 ’O, 27.iv. 1991, Leg: A. Castillo. ANDES: PNN Chingaza , Quebrada La Playa, 4 ° 33 ’ 5 ” N 73 ° 46 ’ 17 ”O 3170m: 1 ♂ and 3 ♀, 9.xi. 2003, Leg: E. Realpe. 2 ♂, 16.x. 2004, Leg: E. Realpe & L. Pérez.

Remarks. Little is known about this Colombian endemic species, which has been recorded from only three localities. Apparently this species is sexually dimorphic.

First description of female. Head. Labium cream. Mandible base reddish brown. Labrum reddish brown with a black small midbasal spot. Gena reddish brown. Anteclypeus reddish brown turning blue to the middle, postclypeus reddish brown. Antefrons light blue, with a black transverse stripe over clypeus, postfrons reddish brown with blue postocular spot not reaching margin of eye, occipital bar blue, ocelli surrounded by black rings, antennaewith first antennomere reddish brown, the rest dark brown. Rear of head cream ( Fig. 10 View FIGURE 10 i).

Thorax. Prothorax reddish brown, with anterior lobe of pronotum and propleura light blue, a black stripe on the center of medial lobe, and posterior lobe light blue. Medial lobe of posterior prothoracic lobe developed into a caudally projected rounded plate, its lateral edge about 1 / 3 distal edge length ( Fig. 10 View FIGURE 10 e). Pterothorax reddish brown, with light blue stripe on mesepisternum, light blue stripe on metepimeron and metepisternum distal 1 / 4, metepimeron light blue, venter cream ( Fig. 10 View FIGURE 10 i). Coxa and remainder of leg light brown with spurs, claws, and tarsomeres black. Eight external spurs on right metafemur and six on left, as long as space between them or shorter, gradually increasing in size toward apex. Six external spurs on left metatibia and seven on right, as long as space between them or shorter, gradually decreasing in size toward apex. Pretarsal claw with well developed supplementary tooth. Wings smoked, especially along costal area, with brown Pt, ratio between distal and proximal sides about 1: 1. CuP reaching CuPAA slightly distal to confluence of CuPAA with hind margin of wing. 13 Px in right FW and 14 in left FW, 11 Px in right HW and 12 in left HW. RP 2 branching between Px 4 and 5 in right FW and under 5 in left FW, between Px 4 and 5 in HW ( Fig. 10 View FIGURE 10 i).

Abdomen. Light brown with dorsal distal 1 / 4 on S 3–7 and S 8–10 black, sides of S 1–3 light blue, dorsum of S 7 with proximal three quarters and distal margin light blue, S 8 with light blue distal margin, S 9–10 with light middorsal line ( Fig. 10 View FIGURE 10 i, 13m). Ovipositor, cercus, and paraproct reddish brown. Well developed black vulvar spine. Subbasal plate of ovipositor triangular. Ovipositor distal apex reaching level of S 10 distal edge, stylus dark brown. Cercus subconical, three quarters as long as S 10, its apex representing the most distal point of the body. Paraproct truncated posteriorly. Total length 34 mm. Abdomen length 26 mm. FW length 22 mm. HW length 21 mm.

Variation. Other females vary as follows. Color darker, with green instead of blue. Labrum light blue. Metepimeron light blue to cream. S 6 may be light blue. S 7 entirely black ( Fig. 13 View FIGURE 13. S 7 – 10 n). Seven external spurs on right metafemur and nine on left, eight external spurs on right metatibia and six on left. Total length 36 mm. Abdomen length 28 mm. FW 23 mm. HW length 22 mm.

Distribution. Cundiboyacense highlands, in the Cordillera Oriental, between about 2,000 and 3,150 m. a.s.l. ( Fig. 15 View FIGURE 15 ).