Oreiallagma prothoracicum ( Kimmins 1945 ) Kimmins, 1945

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 (Odonata: Coenagrionidae), Zootaxa 1805, pp. 1-51 : 46-47

publication ID	https://doi.org/ 10.5281/zenodo.182666
DOI	https://doi.org/10.5281/zenodo.5691623
persistent identifier	https://treatment.plazi.org/id/03ED87D9-FF95-BE61-A9D1-A37CFB426593
treatment provided by	Plazi
scientific name	Oreiallagma prothoracicum ( Kimmins 1945 )
status	comb. nov.

Treatment

Oreiallagma prothoracicum ( Kimmins 1945) View in CoL comb. nov.

Figures 8 View FIGURE 8 b; 25; 53; 87; 92; 104

Telagrion prothoracicum Kimmins 1945: 187 View in CoL –189, figs. 1A–C (description of male, illustration of S10, and posterior lobe of prothorax).

St. Quentin 1960: 48 (in key for males).

Kimmins 1970: 190 (type catalog BMNH).

Leptagrion prothoracicum Santos 1965: 9 (transfer to Leptagrion View in CoL ).

Davies & Tobin 1984: 82 (synonymic list).

Garrison 1991: 13 (synonymic list).

Bridges 1994: VII.191 (synonymic list).

Steinmann 1997: 310 (synonymic list).

Tsuda 2000: 38 (synonymic list).

Costa & Garrison 2001: 384 (mention).

Types: ɗ holotype in BMNH (examined) with following data: "Intaj [Imbabura Prov.] / Ecuador [in ink]"; 3 ɗ paratypes in BMNH (examined).

Characterization. Medial lobe of posterior lobe of prothorax heart-shaped, markedly constricted at base, with moderate medial concavity on posterior margin, and each lateral lobe bilobate ( Fig. 25 View FIGURES 25 – 29 ; as in O. thelkterion ). Distal segment of genital ligula ( Fig. 53 View FIGURES 49 – 53 ) approximately as wide at apex as at base, with a pair of lateroapical lobes each of which are not recurved and are directed distally (unique), a pair of small accessory lateromedial lobes (as in O. quadricolor ), and one ental sclerotized transverse fold (unique, Fig. 53 View FIGURES 49 – 53 c; one non-sclerotized fold in O. oreas , Fig. 52 View FIGURES 49 – 53 c). Dorsal process of male cercus shorter than ventral process, approximately triangular and directed postero-dorsally in lateral view (unique; Figs. 87 View FIGURES 85 – 89 ; 92). Dorsum of S1 orange yellow; of S2–5 orange yellow with posterior black margin; of S6 brown; of S7 black; of S8 blue with lateral black longitudinal stripe on anterior 2/3; of S9 blue; of S10 black. Female unknown.

Diagnosis. This species, the largest of the genus, is unique by cercus morphology: the dorsal process is small, acute, and apical ( Figs. 87 View FIGURES 85 – 89 ; 92); in O. quadricolor the dorsal process is also short and acute, but it is sub-apical ( Figs. 88 View FIGURES 85 – 89 a; 93). The short latero-apical lobe of distal segment of genital ligula ( Fig. 53 View FIGURES 49 – 53 b) is shared only with O. oreas ( Fig. 52 View FIGURES 49 – 53 b), but in the latter species there is a pair of contiguous latero-apical lobes on each side ( Fig. 52 View FIGURES 49 – 53 a). Medial lobe of posterior lobe of prothorax is constricted basally and each lateral lobe is bilobate ( Fig. 25 View FIGURES 25 – 29 ); O. thelkterion ( Fig. 29 View FIGURES 25 – 29 ) is the only other species with bilobate lateral lobes, but its medial lobe is broader than in O. prothoracicum .