Mesoleptobasis incus Sjöstedt 1918

Garrison, Rosser W. & Ellenrieder, Natalia Von, 2009, Redefinition of Mesoleptobasis Sjöstedt 1918 with the inclusion of Metaleptobasis cyanolineata (Wasscher 1998) comb. nov. and description of a new species, Mesoleptobasis elongata (Odonata: Co, Zootaxa 2145, pp. 47-68: 64-67

publication ID

10.5281/zenodo.188653

persistent identifier

http://treatment.plazi.org/id/03FC87D3-EB13-FF94-01B2-FDAD804D45C0

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Plazi

scientific name

Mesoleptobasis incus Sjöstedt 1918
status

 

Mesoleptobasis incus Sjöstedt 1918 

Figs. 1 a, 3 f, 4 e, 5 f, g, 7 e, 11 c, 13 c, 14 e, 15 e, 16 e, 17 e, 18 e, 19 c, e, 20 b, 21

Mesoleptobasis incus Sjöstedt 1918: 22  –23 (description of 3 and Ƥ); — St. Quentin 1960: 51 (illustration of FW base); — Davies 1981: 2; — Bridges 1994: VII. 114 (catalog); — Lencioni 2006: 161 (notes and reproduction of original illustrations).

Mesoleptobasis inca  — Davies & Tobin 1984: 77 (catalog); — Steinmann, 1997: 288 (catalog); — Tsuda 2000: 39 (catalog); — Heckman 2008: 395 (key and reproduction of original illustrations).

Types. Lectotype by present designation (from Rio Autaz, Amazonas, Brazil) in NHRSAbout NHRS (examined).

Specimens examined. Total: 8 3, 15 Ƥ. Brazil, Amazonas State: 1 3 lectotype, Rio Autaz, W to lower Madeira River, S. Amelia, forest (4 ° 24 ' 51 "S, 59 ° 56 ' 21 "W), viii 1914, leg. A. Roman ( NHRSAbout NHRS); 2 3, Tefé (3 ° 22 'S, 64 ° 42 'W, 43 m), i 1962, leg. A. Carvalho ( ABMM); 1 3, same but Amana Lake, i 1991, leg. J. Ribeiro ( ABMM); 1 3 paralectotype, 2 Ƥ paralectotypes, same but ix 1914 ( NHRSAbout NHRS); Rondônia State: 1 Ƥ, Porto Velho (8 ° 46 'S, 63 ° 53 'W), 0 3 ii 1922, leg. J.H. Williamson & J.W. Strohm ( UMMZAbout UMMZ); 2 Ƥ, same but 0 6 ii 1922 ( UMMZAbout UMMZ); 2 Ƥ, same but ( FSCAAbout FSCA); 2 Ƥ, same but ( IORI); 1 3, 1 Ƥ, same but 13 ii 1922 ( UMMZAbout UMMZ); 1 3, 1 Ƥ, same but 21 ii 1922 ( UMMZAbout UMMZ); 1 3, 1 Ƥ, same but 22 ii 1922 ( FSCAAbout FSCA); 2 Ƥ, same but 27 ii 1922 ( UMMZAbout UMMZ); 1 Ƥ, same but 14 v 1922 (RWG).

Diagnosis. Male prothorax with medial bifurcate process with arms directed laterally forming a transverse line between them ( Fig. 3View FIGURE 3 f; shared with M. cantralli  and M. elongata  ); female prothorax lacking processes, with posterior margin slightly trilobate, with medial lobe not surpassing lateral lobes posteriorly; lateral lobes bent anteriorly ( Figs. 5 f, g; unique). Costal side of FW pt longer than basal side, its posterior margin slightly convex in both sexes ( Figs. 11View FIGURE 11 c, 13 c; shared with M. cantralli  , M. cyanolineata  , and M. elongata  ). FW CuA relatively short ( Figs. 11View FIGURE 11 c, 13 c; shared with M. cantralli  and M. elongata  ), ending at vein descending from subnodus to two cells distal in male and four cells distal in female. Genital ligula in ectal view with distal margin deeply bifid and lacking lateral emarginations ( Fig. 14View FIGURE 14 d; shared with M. cantralli  , M. cyanolineata  , and M. elongata  ); in lateral view with basal lobe sclerotized, long, pointed, and directed posteriorly, and dorsal margin of lateral lobe with a single small sclerotized spine ( Fig. 15 e; shared with M. cantralli  ). Posterior margin of S 10 projected medio-dorsally, with a pair of postero-lateral small lobe-like processes ( Figs. 17View FIGURE 17 e, 19 c; shared with M. cantralli  and M. elongata  ). Male cercus lacking a membranous area dorsally (shared with M. cantralli  , M. cyanolineata  , and M. elongata  ), approximately semicircular, as long as wide ( Figs. 17View FIGURE 17 e, 19 c, e; shared with M. elongata  ); in lateral view smoothly curved, with tip directed posteroventrally ( Fig. 18 e); paraproct slender and narrower than half of S 10 height at base in lateral view ( Fig. 18 e; shared with M. cantralli  and M. elongata  ); base of paraproct lacking a thumb-like tubercle (shared with M. acuminata  and M. cyanolineata  ). Ovipositor surpassing tip of cerci for a distance shorter than length of cerci ( Fig. 16View FIGURE 16 e; shared with M. acuminata  and M. cyanolineata  ).

Dimensions. Males (n 6; mean in parenthesis): Hw 16.9–19.5 (17.8); abdomen 31.0–33.0 (32.2); total length 37.0–38.0 (37.5). Females (n 10): Hw 19.0–20.0 (19.4); abdomen 30.0–32.0 (30.3); total length 35.0–37.0 (36.4).

Remarks. Sjöstedt (1918) described M. incus  based on a syntype series of four males and three females. We designate here a male labeled (all printed unless noted otherwise) 'Amazon/ Roman, Rio/Autaz, aug., Mesoleptobasis  / 3 incus  n. sp. [written]/Yngve Sjöstedt det.' as lectotype, and provide illustrations of its diagnostic structures ( Figs 1 a, 3 f, 4 e, 11 c, 14 e, 15 e, 17 e, 18 e, 19 c). The small series collected by J.H. Williamson and J.S. Strohm in 1922 was identified by E.B. Williamson as M. incus  although there is no evidence that he ever compared them directly with Sjöstedt's types. The series of males from Rondônia agree with the lectotype ( Fig. 19View FIGURE 19 c) except that the cercus in dorsal view is more strongly excavated laterally ( Fig. 19View FIGURE 19 e).

Distribution. Amazonas State in Venezuela and Amazonas and Rondônia States in Brazil, sympatric with M. cantralli  in the latter ( Fig. 21View FIGURE 21).

NHRS

Swedish Museum of Natural History, Entomology Collections

UMMZ

University of Michigan, Museum of Zoology

FSCA

Florida State Collection of Arthropods, The Museum of Entomology

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Odonata

Family

Coenagrionidae

Genus

Mesoleptobasis

Loc

Mesoleptobasis incus Sjöstedt 1918

Garrison, Rosser W. & Ellenrieder, Natalia Von 2009

2009
Loc

Mesoleptobasis inca

Heckman 2008: 395
Tsuda 2000: 39
Steinmann 1997: 288
Davies 1984: 77

1984
Loc

Mesoleptobasis incus Sjöstedt 1918 : 22

Lencioni 2006: 161
Davies 1981: 2
St 1960: 51Sjostedt 1918: 22

1960