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Comparative analysis and systematic mapping of the labial sensilla in the Nepomorpha (Heteroptera: Insecta).

Brożek J - ScientificWorldJournal (2013)

Bottom Line: Twenty-one morphologically distinct types of the mechanosensilla as well as two types of the trichoid sensilla (contact-chemoreceptive sensillum) have been identified on all labial segments in representatives of subfamilies.In Nepomorpha, morphological ground plan of the labial sensory structures is represented by an apical sensory field with 10-13 pairs of papillae sensilla and the peg-in-pit ones placed more laterally; numerous trichoid sensilla are placed on the IV segment; the chaetica sensilla are present and placed in groups or rows distributed along the labium near the labial groove on the dorsal side, and also several chaetica sensilla are unevenly scattered on the surface of that segment; the cupola and peg sensilla are numerous and evenly scattered on the fourth labial segment; the prioprerecptive sensilla, one pair is positioned on the dorsal side and on the fourth segment of the labium.The new apomorphical characters have been established for the labial sensilla in the Nepomorpha.

View Article: PubMed Central - PubMed

Affiliation: Department of Zoology, Faculty of Biology and Environmental Protection, University of Silesia, Bankowa Street 9, 40-007 Katowice, Poland. jolanta.brozek@us.edu.pl

ABSTRACT
The present study provides new data concerning the morphology and distribution of the labial sensilla of 55 species of 12 nepomorphan families (Heteroptera: Nepomorpha) using the scanning electron microscope. On the labial tip, three morphologically distinct types of chemosensilla have been identified: two types of papillae sensilla and one type of peg-in-pit sensilla. Twenty-one morphologically distinct types of the mechanosensilla as well as two types of the trichoid sensilla (contact-chemoreceptive sensillum) have been identified on all labial segments in representatives of subfamilies. In Nepomorpha, morphological ground plan of the labial sensory structures is represented by an apical sensory field with 10-13 pairs of papillae sensilla and the peg-in-pit ones placed more laterally; numerous trichoid sensilla are placed on the IV segment; the chaetica sensilla are present and placed in groups or rows distributed along the labium near the labial groove on the dorsal side, and also several chaetica sensilla are unevenly scattered on the surface of that segment; the cupola and peg sensilla are numerous and evenly scattered on the fourth labial segment; the prioprerecptive sensilla, one pair is positioned on the dorsal side and on the fourth segment of the labium. The new apomorphical characters have been established for the labial sensilla in the Nepomorpha.

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Types of distribution of the labial apical sensilla in the Nepomorpha: Type A Nepidae, Belostomatidae, and Nerthrinae. (a) Nepa cinerea. (b) Laccotrephes japonensis. (c) Ranatra chinensis. (d) Belostomatinae; Appasus major. (e) Lethocerinae; Lethocerus deyrollei. (f) Type B, Ochteridae; Ochterus marginatus. (g) Type C, Gelastocorinae; Gelastocoris oculatus. (h) Type A, Nerthrinae; Nerthra nepaeformis. (i) Type B, Aphelocheiridae; Aphelocheirus aestivalis. (j) Type C, Cheirochelinae; Coptocatus oblongulus. (k) Limnocorinae; Limnocoris lutzi. (l) Helotrephidae; Helotrephes semiglobosus. (m) Type D, Pleidae; Paraplea frontalis. (n) Type C, Notonectinae; Notonecta glauca. (o) Type E, Cymatiinae; Cymatia coleoptrata. (p) Diaprepocoridae; Diaprepocoris zealandiae. (q) Micronectidae; Micronecta quadristrigata. PAS1 papilla sensillum, flattened; PAS2 papilla sensillum, rounded; PIP peg-in-pit sensillum; CUS cupola-like sensillum located outside the labial tip; RBS ribbon-like sensillum; PES peg sensillum.
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fig6: Types of distribution of the labial apical sensilla in the Nepomorpha: Type A Nepidae, Belostomatidae, and Nerthrinae. (a) Nepa cinerea. (b) Laccotrephes japonensis. (c) Ranatra chinensis. (d) Belostomatinae; Appasus major. (e) Lethocerinae; Lethocerus deyrollei. (f) Type B, Ochteridae; Ochterus marginatus. (g) Type C, Gelastocorinae; Gelastocoris oculatus. (h) Type A, Nerthrinae; Nerthra nepaeformis. (i) Type B, Aphelocheiridae; Aphelocheirus aestivalis. (j) Type C, Cheirochelinae; Coptocatus oblongulus. (k) Limnocorinae; Limnocoris lutzi. (l) Helotrephidae; Helotrephes semiglobosus. (m) Type D, Pleidae; Paraplea frontalis. (n) Type C, Notonectinae; Notonecta glauca. (o) Type E, Cymatiinae; Cymatia coleoptrata. (p) Diaprepocoridae; Diaprepocoris zealandiae. (q) Micronectidae; Micronecta quadristrigata. PAS1 papilla sensillum, flattened; PAS2 papilla sensillum, rounded; PIP peg-in-pit sensillum; CUS cupola-like sensillum located outside the labial tip; RBS ribbon-like sensillum; PES peg sensillum.

Mentions: Five patterns of distribution of the apical sensilla have been identified (Figures 6(a)–6(q)) as follows.


Comparative analysis and systematic mapping of the labial sensilla in the Nepomorpha (Heteroptera: Insecta).

Brożek J - ScientificWorldJournal (2013)

Types of distribution of the labial apical sensilla in the Nepomorpha: Type A Nepidae, Belostomatidae, and Nerthrinae. (a) Nepa cinerea. (b) Laccotrephes japonensis. (c) Ranatra chinensis. (d) Belostomatinae; Appasus major. (e) Lethocerinae; Lethocerus deyrollei. (f) Type B, Ochteridae; Ochterus marginatus. (g) Type C, Gelastocorinae; Gelastocoris oculatus. (h) Type A, Nerthrinae; Nerthra nepaeformis. (i) Type B, Aphelocheiridae; Aphelocheirus aestivalis. (j) Type C, Cheirochelinae; Coptocatus oblongulus. (k) Limnocorinae; Limnocoris lutzi. (l) Helotrephidae; Helotrephes semiglobosus. (m) Type D, Pleidae; Paraplea frontalis. (n) Type C, Notonectinae; Notonecta glauca. (o) Type E, Cymatiinae; Cymatia coleoptrata. (p) Diaprepocoridae; Diaprepocoris zealandiae. (q) Micronectidae; Micronecta quadristrigata. PAS1 papilla sensillum, flattened; PAS2 papilla sensillum, rounded; PIP peg-in-pit sensillum; CUS cupola-like sensillum located outside the labial tip; RBS ribbon-like sensillum; PES peg sensillum.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3713378&req=5

fig6: Types of distribution of the labial apical sensilla in the Nepomorpha: Type A Nepidae, Belostomatidae, and Nerthrinae. (a) Nepa cinerea. (b) Laccotrephes japonensis. (c) Ranatra chinensis. (d) Belostomatinae; Appasus major. (e) Lethocerinae; Lethocerus deyrollei. (f) Type B, Ochteridae; Ochterus marginatus. (g) Type C, Gelastocorinae; Gelastocoris oculatus. (h) Type A, Nerthrinae; Nerthra nepaeformis. (i) Type B, Aphelocheiridae; Aphelocheirus aestivalis. (j) Type C, Cheirochelinae; Coptocatus oblongulus. (k) Limnocorinae; Limnocoris lutzi. (l) Helotrephidae; Helotrephes semiglobosus. (m) Type D, Pleidae; Paraplea frontalis. (n) Type C, Notonectinae; Notonecta glauca. (o) Type E, Cymatiinae; Cymatia coleoptrata. (p) Diaprepocoridae; Diaprepocoris zealandiae. (q) Micronectidae; Micronecta quadristrigata. PAS1 papilla sensillum, flattened; PAS2 papilla sensillum, rounded; PIP peg-in-pit sensillum; CUS cupola-like sensillum located outside the labial tip; RBS ribbon-like sensillum; PES peg sensillum.
Mentions: Five patterns of distribution of the apical sensilla have been identified (Figures 6(a)–6(q)) as follows.

Bottom Line: Twenty-one morphologically distinct types of the mechanosensilla as well as two types of the trichoid sensilla (contact-chemoreceptive sensillum) have been identified on all labial segments in representatives of subfamilies.In Nepomorpha, morphological ground plan of the labial sensory structures is represented by an apical sensory field with 10-13 pairs of papillae sensilla and the peg-in-pit ones placed more laterally; numerous trichoid sensilla are placed on the IV segment; the chaetica sensilla are present and placed in groups or rows distributed along the labium near the labial groove on the dorsal side, and also several chaetica sensilla are unevenly scattered on the surface of that segment; the cupola and peg sensilla are numerous and evenly scattered on the fourth labial segment; the prioprerecptive sensilla, one pair is positioned on the dorsal side and on the fourth segment of the labium.The new apomorphical characters have been established for the labial sensilla in the Nepomorpha.

View Article: PubMed Central - PubMed

Affiliation: Department of Zoology, Faculty of Biology and Environmental Protection, University of Silesia, Bankowa Street 9, 40-007 Katowice, Poland. jolanta.brozek@us.edu.pl

ABSTRACT
The present study provides new data concerning the morphology and distribution of the labial sensilla of 55 species of 12 nepomorphan families (Heteroptera: Nepomorpha) using the scanning electron microscope. On the labial tip, three morphologically distinct types of chemosensilla have been identified: two types of papillae sensilla and one type of peg-in-pit sensilla. Twenty-one morphologically distinct types of the mechanosensilla as well as two types of the trichoid sensilla (contact-chemoreceptive sensillum) have been identified on all labial segments in representatives of subfamilies. In Nepomorpha, morphological ground plan of the labial sensory structures is represented by an apical sensory field with 10-13 pairs of papillae sensilla and the peg-in-pit ones placed more laterally; numerous trichoid sensilla are placed on the IV segment; the chaetica sensilla are present and placed in groups or rows distributed along the labium near the labial groove on the dorsal side, and also several chaetica sensilla are unevenly scattered on the surface of that segment; the cupola and peg sensilla are numerous and evenly scattered on the fourth labial segment; the prioprerecptive sensilla, one pair is positioned on the dorsal side and on the fourth segment of the labium. The new apomorphical characters have been established for the labial sensilla in the Nepomorpha.

Show MeSH