Distal leg structures of Zoraptera – did the loss of adhesive devices curb the chance of diversification?

The distal leg structures of Zoraptera are documented and discussed with respect to their functional morphology and evolutionary aspects. We investigated eight species using scanning electron microscopy. We analyzed material compositions of the tarsus in three representative species using confocal l...

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Veröffentlicht in:Ventricular Restraint Improves Outcomes in HF Patients with CRT. - 2011. - Amsterdam [u.a.]
1. Verfasser: Matsumura, Yoko (VerfasserIn)
Weitere Verfasser: Lima, Sheila P. (BerichterstatterIn), Rafael, José A. (BerichterstatterIn), Câmara, Josenir T. (BerichterstatterIn), Beutel, Rolf G. (BerichterstatterIn), Gorb, Stanislav N. (BerichterstatterIn)
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022transfer abstract
Zugriff auf das übergeordnete Werk:Ventricular Restraint Improves Outcomes in HF Patients with CRT
Schlagworte:Simplification Polyneoptera Ground lice Cleaning device Miniaturization Tarsus
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245 1 0 |a Distal leg structures of Zoraptera – did the loss of adhesive devices curb the chance of diversification? 
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520 |a The distal leg structures of Zoraptera are documented and discussed with respect to their functional morphology and evolutionary aspects. We investigated eight species using scanning electron microscopy. We analyzed material compositions of the tarsus in three representative species using confocal laser scanning microscopy. When possible, we included both sexes, wing morphs, and nymphs and compared the structures among them. The distal leg structure is unusually uniform across zorapterans regardless of the sex, morphs, and developmental stages. The observed features combine simplification with innovation. The former is likely partially correlated with cryptic microhabitats and miniaturization. Innovation includes a protibial cleaning organ. This is very likely an autapomorphy of Zoraptera. The tarsi are composed of two tarsomeres covered with setae. The pretarsus distally bears an unguitractor plate and well-sclerotized claws. The tarsomeres appear less-sclerotized than the covering setae. The articulation between the basitarsus and tarsomere 2 is hinge-like, implying that tarsomere 2 moves only mediolaterally. The simplified and specialized tarsal morphology is likely suitable for the typical zorapteran microhabitat, under bark. However, the irreversible complete loss of adhesive devices prevented zorapterans to make use of a broader spectrum of environments and was presumably one reason for the species paucity of the group. 
520 |a The distal leg structures of Zoraptera are documented and discussed with respect to their functional morphology and evolutionary aspects. We investigated eight species using scanning electron microscopy. We analyzed material compositions of the tarsus in three representative species using confocal laser scanning microscopy. When possible, we included both sexes, wing morphs, and nymphs and compared the structures among them. The distal leg structure is unusually uniform across zorapterans regardless of the sex, morphs, and developmental stages. The observed features combine simplification with innovation. The former is likely partially correlated with cryptic microhabitats and miniaturization. Innovation includes a protibial cleaning organ. This is very likely an autapomorphy of Zoraptera. The tarsi are composed of two tarsomeres covered with setae. The pretarsus distally bears an unguitractor plate and well-sclerotized claws. The tarsomeres appear less-sclerotized than the covering setae. The articulation between the basitarsus and tarsomere 2 is hinge-like, implying that tarsomere 2 moves only mediolaterally. The simplified and specialized tarsal morphology is likely suitable for the typical zorapteran microhabitat, under bark. However, the irreversible complete loss of adhesive devices prevented zorapterans to make use of a broader spectrum of environments and was presumably one reason for the species paucity of the group. 
650 7 |a Simplification  |2 Elsevier 
650 7 |a Polyneoptera  |2 Elsevier 
650 7 |a Ground lice  |2 Elsevier 
650 7 |a Cleaning device  |2 Elsevier 
650 7 |a Miniaturization  |2 Elsevier 
650 7 |a Tarsus  |2 Elsevier 
700 1 |a Lima, Sheila P.  |4 oth 
700 1 |a Rafael, José A.  |4 oth 
700 1 |a Câmara, Josenir T.  |4 oth 
700 1 |a Beutel, Rolf G.  |4 oth 
700 1 |a Gorb, Stanislav N.  |4 oth 
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773 1 8 |g volume:68  |g year:2022  |g pages:0 
856 4 0 |u https://doi.org/10.1016/j.asd.2022.101164  |3 Volltext 
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