Limits...
The thorax morphology of Epiophlebia (Insecta: Odonata) nymphs--including remarks on ontogenesis and evolution.

Büsse S, Helmker B, Hörnschemeyer T - Sci Rep (2015)

Bottom Line: In total, 75 muscles have been identified in the thorax of Epiophlebia.This represents the highest number of thoracic muscles ever found in any odonate.It includes six muscles that are reported for the first time for Odonata, and three of these are even new for Pterygota.

View Article: PubMed Central - PubMed

Affiliation: University Museum of Zoology, Department of Zoology, University of Cambridge, Downing Street, CB2 3EJ Cambridge, UK.

ABSTRACT
The species of Epiophlebia are unique among the recent Odonata in showing a mixture of morphological characters of dragonflies (Anisoptera) and damselflies (Zygoptera). The status of the four described extant species of Epiophlebia is disputable from a genetic as well as from a morphological point of view. Here we present an analysis of the thoracic musculature of different nymphal instars of Epiophlebia laidlawi and Epiophlebia superstes to elucidate their morphology and ontogenetic development. In total, 75 muscles have been identified in the thorax of Epiophlebia. This represents the highest number of thoracic muscles ever found in any odonate. It includes six muscles that are reported for the first time for Odonata, and three of these are even new for Pterygota. In total, our results indicate that Epiophlebia has the most ancestral thoracic morphology among Odonata.

No MeSH data available.


Related in: MedlinePlus

Dorso-ventral musculature of Epiophlebia laidlawi.3D - reconstruction from SRμCT date showing the left half of the thorax. Abd - Abdomen, dvm - dorso-ventral muscle.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4526886&req=5

f2: Dorso-ventral musculature of Epiophlebia laidlawi.3D - reconstruction from SRμCT date showing the left half of the thorax. Abd - Abdomen, dvm - dorso-ventral muscle.

Mentions: Idvm18 (14) (Fig. 2) originates from a large area of the prothoracic tergum that also encompasses the origin of Itpm3. Idvm18 inserts on an apodeme on the posterior base of the procoxa. It is by far the largest prothoracic muscle. Maloeuf27 described its lateral branch as a discrete muscle (15). Idvm18 does show a slight dichotomy, yet all of its fibres run from the tergum to the apodeme. E. superstes and E. laidlawi show the same characteristics. Neither in Anisoptera nor in Zygoptera Idvm18 shows any striking dichotomy that would suggest the presence of an independent muscle (15)1820.


The thorax morphology of Epiophlebia (Insecta: Odonata) nymphs--including remarks on ontogenesis and evolution.

Büsse S, Helmker B, Hörnschemeyer T - Sci Rep (2015)

Dorso-ventral musculature of Epiophlebia laidlawi.3D - reconstruction from SRμCT date showing the left half of the thorax. Abd - Abdomen, dvm - dorso-ventral muscle.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4526886&req=5

f2: Dorso-ventral musculature of Epiophlebia laidlawi.3D - reconstruction from SRμCT date showing the left half of the thorax. Abd - Abdomen, dvm - dorso-ventral muscle.
Mentions: Idvm18 (14) (Fig. 2) originates from a large area of the prothoracic tergum that also encompasses the origin of Itpm3. Idvm18 inserts on an apodeme on the posterior base of the procoxa. It is by far the largest prothoracic muscle. Maloeuf27 described its lateral branch as a discrete muscle (15). Idvm18 does show a slight dichotomy, yet all of its fibres run from the tergum to the apodeme. E. superstes and E. laidlawi show the same characteristics. Neither in Anisoptera nor in Zygoptera Idvm18 shows any striking dichotomy that would suggest the presence of an independent muscle (15)1820.

Bottom Line: In total, 75 muscles have been identified in the thorax of Epiophlebia.This represents the highest number of thoracic muscles ever found in any odonate.It includes six muscles that are reported for the first time for Odonata, and three of these are even new for Pterygota.

View Article: PubMed Central - PubMed

Affiliation: University Museum of Zoology, Department of Zoology, University of Cambridge, Downing Street, CB2 3EJ Cambridge, UK.

ABSTRACT
The species of Epiophlebia are unique among the recent Odonata in showing a mixture of morphological characters of dragonflies (Anisoptera) and damselflies (Zygoptera). The status of the four described extant species of Epiophlebia is disputable from a genetic as well as from a morphological point of view. Here we present an analysis of the thoracic musculature of different nymphal instars of Epiophlebia laidlawi and Epiophlebia superstes to elucidate their morphology and ontogenetic development. In total, 75 muscles have been identified in the thorax of Epiophlebia. This represents the highest number of thoracic muscles ever found in any odonate. It includes six muscles that are reported for the first time for Odonata, and three of these are even new for Pterygota. In total, our results indicate that Epiophlebia has the most ancestral thoracic morphology among Odonata.

No MeSH data available.


Related in: MedlinePlus