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Rediscovery of Nuvol umbrosus Navás (Neuroptera, Chrysopidae, Leucochrysini): a redescription and discussion.

Tauber CA, Sosa F - Zookeys (2015)

Bottom Line: Unique aspects of the wing venation and the unusual pattern of banding on the wings support the retention of Nuvol as a valid genus within the Leucochrysini.These differences may indicate the presence of two distinct, geographically separated species within the genus.However, largely because we do not know the sexes of the earlier specimens, we are treating the differences discovered in the two female specimens as expressions of intraspecific variation.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Entomology, Comstock Hall, Cornell University, Ithaca, NY 14853 and Department of Entomology & Nematology, University of California, Davis, CA 95616, U.S.A.

ABSTRACT
The monotypic leucochrysine genus Nuvol was previously known from three specimens of Nuvol umbrosus Navás, collected in the Atlantic Forest region of Brazil. For many years these specimens have been missing, and the genus has remained without a modern description. Here, the species is redescribed based on two newly discovered specimens (females) from the Amazonian region. The female terminalia are relatively simple, except for the subgenitale, which is enlarged, folded into two sections, and heavily sclerotized. Unique aspects of the wing venation and the unusual pattern of banding on the wings support the retention of Nuvol as a valid genus within the Leucochrysini. There are differences between the Amazonian specimens studied here and the earlier descriptions based on specimens from the Atlantic Forest. These differences may indicate the presence of two distinct, geographically separated species within the genus. However, largely because we do not know the sexes of the earlier specimens, we are treating the differences discovered in the two female specimens as expressions of intraspecific variation.

No MeSH data available.


Nuvolumbrosus Navás female genitalia. a, b spermathecal complex and subgenitale, lateral c, d subgenitale, ventral [a, c Brazil, Amazonas, FS b, d Brazil, Rondônia, CAT]. l.l. lower layer of subgenitale sg subgenitale sp spermatheca sp.d. spermathecal duct S7 seventh sternite u.l. upper layer of subgenitale.
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Figure 7: Nuvolumbrosus Navás female genitalia. a, b spermathecal complex and subgenitale, lateral c, d subgenitale, ventral [a, c Brazil, Amazonas, FS b, d Brazil, Rondônia, CAT]. l.l. lower layer of subgenitale sg subgenitale sp spermatheca sp.d. spermathecal duct S7 seventh sternite u.l. upper layer of subgenitale.

Mentions: (Figs 5–7): Abdomen with spiracles simple (Fig. 5e); callus cerci round, brown to black, heavily sclerotized (INPA specimen), located dorsally on T9+ect, with 28–32 trichobothria stemming from irregularly spaced sockets (Fig. 5c, f); ninth tergite (T9) and ectoproct fused, but invaginated distally (Fig. 5a); T9+ect completely divided dorsally by deep groove (Fig. 5d). Praegenitale absent. Colleterial complex (Fig. 6b) with elongate, delicate gland, apparently with scattered particles; reservoir sperical, with colliculate, membranous surface, extending apically only into ectoproct; transverse sclerite delicate, membranous, with small, elongate teeth. Spermathecal complex (Fig. 6a) simple; spermatheca pillbox-shaped with small to moderate, V-shaped invagination; spermathecal duct elongate (~2.5–3× width of spermatheca), curvy, covered with fine, hair-like, glandular ducts throughout distal ~2/3 of duct, longest and most dense distally, becoming thinner to absent basally; velum small, connecting directly to bursal duct; bursal duct leathery, elongate, bent, extending posteriorly to bursa copulatrix; bursa membranous, with two narrow glands. Subgenitale (Fig. 7) large, leathery, almost as broad as tip of S7, composed of upper and lower sections extending distally from relatively deep fold at tip of S7, well beyond sternite; lower section triangular (ventral view), slightly concave, with paired distal lobes extending posteriorly as a knob (lateral view), lobes separated by small, mesal groove; upper section of subgenitale dense, especially laterally, slightly convex, folded above and connected basally to lower section.


Rediscovery of Nuvol umbrosus Navás (Neuroptera, Chrysopidae, Leucochrysini): a redescription and discussion.

Tauber CA, Sosa F - Zookeys (2015)

Nuvolumbrosus Navás female genitalia. a, b spermathecal complex and subgenitale, lateral c, d subgenitale, ventral [a, c Brazil, Amazonas, FS b, d Brazil, Rondônia, CAT]. l.l. lower layer of subgenitale sg subgenitale sp spermatheca sp.d. spermathecal duct S7 seventh sternite u.l. upper layer of subgenitale.
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4591607&req=5

Figure 7: Nuvolumbrosus Navás female genitalia. a, b spermathecal complex and subgenitale, lateral c, d subgenitale, ventral [a, c Brazil, Amazonas, FS b, d Brazil, Rondônia, CAT]. l.l. lower layer of subgenitale sg subgenitale sp spermatheca sp.d. spermathecal duct S7 seventh sternite u.l. upper layer of subgenitale.
Mentions: (Figs 5–7): Abdomen with spiracles simple (Fig. 5e); callus cerci round, brown to black, heavily sclerotized (INPA specimen), located dorsally on T9+ect, with 28–32 trichobothria stemming from irregularly spaced sockets (Fig. 5c, f); ninth tergite (T9) and ectoproct fused, but invaginated distally (Fig. 5a); T9+ect completely divided dorsally by deep groove (Fig. 5d). Praegenitale absent. Colleterial complex (Fig. 6b) with elongate, delicate gland, apparently with scattered particles; reservoir sperical, with colliculate, membranous surface, extending apically only into ectoproct; transverse sclerite delicate, membranous, with small, elongate teeth. Spermathecal complex (Fig. 6a) simple; spermatheca pillbox-shaped with small to moderate, V-shaped invagination; spermathecal duct elongate (~2.5–3× width of spermatheca), curvy, covered with fine, hair-like, glandular ducts throughout distal ~2/3 of duct, longest and most dense distally, becoming thinner to absent basally; velum small, connecting directly to bursal duct; bursal duct leathery, elongate, bent, extending posteriorly to bursa copulatrix; bursa membranous, with two narrow glands. Subgenitale (Fig. 7) large, leathery, almost as broad as tip of S7, composed of upper and lower sections extending distally from relatively deep fold at tip of S7, well beyond sternite; lower section triangular (ventral view), slightly concave, with paired distal lobes extending posteriorly as a knob (lateral view), lobes separated by small, mesal groove; upper section of subgenitale dense, especially laterally, slightly convex, folded above and connected basally to lower section.

Bottom Line: Unique aspects of the wing venation and the unusual pattern of banding on the wings support the retention of Nuvol as a valid genus within the Leucochrysini.These differences may indicate the presence of two distinct, geographically separated species within the genus.However, largely because we do not know the sexes of the earlier specimens, we are treating the differences discovered in the two female specimens as expressions of intraspecific variation.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Entomology, Comstock Hall, Cornell University, Ithaca, NY 14853 and Department of Entomology & Nematology, University of California, Davis, CA 95616, U.S.A.

ABSTRACT
The monotypic leucochrysine genus Nuvol was previously known from three specimens of Nuvol umbrosus Navás, collected in the Atlantic Forest region of Brazil. For many years these specimens have been missing, and the genus has remained without a modern description. Here, the species is redescribed based on two newly discovered specimens (females) from the Amazonian region. The female terminalia are relatively simple, except for the subgenitale, which is enlarged, folded into two sections, and heavily sclerotized. Unique aspects of the wing venation and the unusual pattern of banding on the wings support the retention of Nuvol as a valid genus within the Leucochrysini. There are differences between the Amazonian specimens studied here and the earlier descriptions based on specimens from the Atlantic Forest. These differences may indicate the presence of two distinct, geographically separated species within the genus. However, largely because we do not know the sexes of the earlier specimens, we are treating the differences discovered in the two female specimens as expressions of intraspecific variation.

No MeSH data available.