Oreiallagma oreas ( Ris 1918 )
Ellenrieder, Natalia Von & Garrison, Rosser W., 2008, Oreiallagma gen. nov. with a redefinition of Cyanallagma Kennedy 1920 and Mesamphiagrion Kennedy 1920, and the description of M. dunklei sp. nov. and M. ecuatoriale sp. nov. from Ecuador (Odon, Zootaxa 1805, pp. 1-51: 45-46
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|Oreiallagma oreas ( Ris 1918 )|
Oreiallagma oreas ( Ris 1918) comb. nov.
Figures 26View FIGURES 25 – 29; 52; 89; 94; 104
Telagrion oreas Ris 1918: 136 , 138– 139, fig. 78 (diagnosis from T. quadricolor , description of male, illustration of S 10). Kimmins 1945: 189 (comparison with T. prothoracicum ). St. Quentin 1960: 48 (key for males).
Santos 1965: 9 (possible placement in Leptagrion ). Davies & Tobin 1984: 94 (synonymic list).
Garrison 1991: 13 (synonymic list).
Bridges 1994: VII. 174 (synonymic list).
Steinmann 1997: 358 (synonymic list).
Tsuda 2000: 50 (synonymic list).
Lencioni 2004: 92 (mention).
Types: ɗ holotype in FNS (examined) with following data: "Monte Socorro 2300 m / [Valle del Cauca Dept.] Colombia, W. Cordill./ vii. 0 9 [A.H.] Fassl"; (Senckenberg Register No. 10764).
Characterization. Medial lobe of posterior lobe of prothorax is slightly constricted at base, subquadrate, with shallow medial concavity on posterior margin ( Fig. 26View FIGURES 25 – 29; as in O. acutum and O. quadricolor ). Distal segment of genital ligula ( Fig. 52View FIGURES 49 – 53) approximately as wide at apex as at base with two contiguous pairs of lateroapical lobes (unique) recurved and directed basally, small accessory latero-medial lobes and one (as in O. prothoracicum ) ental membranous faint transverse fold ( Fig. 52View FIGURES 49 – 53 c). Dorsal process of male cercus much shorter than ventral process, represented by a blunt setose tubercle ( Figs. 89View FIGURES 85 – 89; 94; unique). Dorsum of S 1 dark brown, posteriorly with a transverse oval greenish blue spot; of S 2 orange becoming diffuse brown anteriorly; of S 3– 5 pale orange-red; of S 6 orange antero-laterally, black dorso-posteriorly; of S 7 black with a narrow reddish lateral margin over the anterior three fourths; of S 8–9 blue, laterally reddish, both colors separated through a black longitudinal stripe; of S 10 black. Female unknown.
Diagnosis. This species, known only from the mature holotype male, is unique in that the dorsal process of the cercus is represented by a blunt setose tubercle ( Figs. 89View FIGURES 85 – 89; 94). In all other species the dorsal process is either long and digit-like ( O. acutum , Figs. 85View FIGURES 85 – 89; 90; O. thelkterion , Figs. 86View FIGURES 85 – 89; 91) or acute if small ( O. prothoracicum , Figs. 87View FIGURES 85 – 89; 92; O. quadricolor , Figs. 88View FIGURES 85 – 89 a; 93). The distal segment of the genital ligula ( Fig. 52View FIGURES 49 – 53 a) is uniquely armed with a pair of small contiguous latero-apical lobes (a single long latero-apical recurved lobe in O. thelkterion , Fig. 49View FIGURES 49 – 53 b; O. quadricolor , Fig. 50View FIGURES 49 – 53 b; and O. acutum , Fig. 51View FIGURES 49 – 53 b; and a single small latero-apical lobe in O. prothoracicum , Fig. 53View FIGURES 49 – 53 b).
Biology. Unknown; see remarks under generic account.
Distribution. Colombia (Valle del Cauca Department) at 2300 m above sea level ( Fig. 104View FIGURE 104). Following information about this locality is provided by Ris (1918): "......Santa Margarita ('situated deep in the high mountain forest at 2200 m is the last house Santa Margarita, on upper bank of Rio Cali, the estate of a Colombian general'); out from here the gold mine Monte Socorro is reachable with effort."
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