Dasmeusa isabellina Cavichioli & Chiamolera, 1999
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publication ID |
https://dx.doi.org/10.3897/asp.81.e102848 |
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publication LSID |
lsid:zoobank.org:pub:9CF1B525-3D10-4516-A1B6-DA386F4C48DF |
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persistent identifier |
https://treatment.plazi.org/id/EC1C6B33-4CE2-5F88-A12C-37438A044B1C |
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treatment provided by |
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scientific name |
Dasmeusa isabellina Cavichioli & Chiamolera, 1999 |
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3.1.4.4. Dasmeusa isabellina Cavichioli & Chiamolera, 1999 View in CoL
Figs 1E View Figure 1 , 5A-G View Figure 5
Length.
♂ paratype 8.4 mm; ♂ 7.8 mm. Head (Figs 1E View Figure 1 , 5A View Figure 5 ): in dorsal view, strongly produced anteriorly; median length of crown approximately 9/10 of interocular width and 5/10 of transocular width; anterior margin rounded; ocelli large, located approximately on imaginary line between anterior eye angles; surface of crown flat; antennal ledge, in dorsal view, slightly protuberant; in lateral view, with anterior margin convex. Thorax (Figs 1E View Figure 1 , 5A View Figure 5 ) with pronotum, in dorsal view, with width slightly greater than transocular width of head; lateral margins convergent anteriorly. Forewing with base of fourth apical cell approximately aligned with base of third.
Coloration (Fig. 1E View Figure 1 ).
Head, pronotum, and forewing mostly orange; mesonotum dull white. Frons mostly orange; clypeus pale yellow. Remainder of face (gena and lorum) and lateral and ventral portions of thorax pale yellow; legs mostly pale yellow to orange.
Male terminalia.
Pygofer (Fig. 5B View Figure 5 ), in lateral view, with posterior margin obliquely truncate; macrosetae distributed mostly on posterior third but some located more anteriorly. Subgenital plate (Fig. 5C View Figure 5 ), in ventral view, with basal third broad and distal two-thirds strongly narrowed; with elongate uniseriate macrosetae on basal third, microsetae distributed mostly along outer lateral margin. Connective (Fig. 5D View Figure 5 ), in dorsal view, T-shaped; stalk carinate dorsally, subequal in length to one arm width. Style (Fig. 5D View Figure 5 ), in dorsal view, somewhat S-shaped, slender, extending posteriorly beyond apex of connective; narrowed apically, apex obtuse. Aedeagus (Fig. 5E View Figure 5 ) symmetrical; shaft short, its whole ventral margin produced into strong process directed anteroventrally, posterior margin of process dentate; gonoduct distinct, gonopore located apically. Paraphyses slightly asymmetrical; elongate, extending well beyond subgenital plate apex; stalk shorter than rami (Fig. 5F View Figure 5 ) and, in lateral view, broadened posteriorly (Fig. 5G View Figure 5 ); rami, in lateral view, long and slender, their apexes spiniform (Fig. 5G View Figure 5 ).
Female unknown.
Material examined.
Brazil, Pará State • 1 ♂: " Belterra - PA [ Pará State] \ Faz. [Fazenda] Treviso \ 01-10/XII/2018 \ Marcela Monné \ Pedro S. Dias " (MNRJ) • 1 ♂ paratype: "Sta. [Santa] Isabel do Pará \ PA, Brasil \ 30.III.1962 \ J. Bechyné col." (DZUP) • 1 ♂: “Canindé \ Rio Gurupi , PA \ IV.1963, Malkin \ & Pinheiros col." (MZSP) .
Taxonomic notes.
Cavichioli and Chiamolera (1999) considered D. isabellina (Fig. 1E View Figure 1 ) similar to D. basseti (Fig. 1A View Figure 1 ) in the male terminalia, especially the aedeagus. These two species can be distinguished from each other by the shape of the apex of the paraphyses rami, which are bifurcated in D. basseti (Fig. 2F View Figure 2 ) and not bifurcated in D. isabellina (Fig. 5F View Figure 5 ). The dorsal region of the body (Fig. 1E View Figure 1 ) is somewhat more orange in D. isabellina than in other species of the genus.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.