Morphological ontogeny of Melanozetes avachai n. sp., a unique member of Melanozetes (Acari: Oribatida: Ceratozetidae)

International audience The morphological ontogeny of Melanozetes avachai n. sp. from Kamchatka Peninsula (Russia) is described and illustrated. The juveniles of this species have a humeral organ and a humeral macrosclerite, which occur in most Sphaerozetinae (Ceratozetidae), but in the larva seta c1...

Full description

Bibliographic Details
Published in:Acarologia
Main Authors: Seniczak, S., Kaczmarek, S., Seniczak, A.
Other Authors: Department of Evolutionary Biology, Kazimierz Wielki University (UKW), Department of Ecology, UTP University of Science and Technology
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2016
Subjects:
Oribatid mites
Sphaerozetinae
juveniles
leg setation
stage structure
[SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics
Phylogenetics and taxonomy
[SDV.BA.ZI]Life Sciences [q-bio]/Animal biology/Invertebrate Zoology
Kamchatka Peninsula
Seta
Kamchatka
Online Access:https://hal.archives-ouvertes.fr/hal-01547370
https://hal.archives-ouvertes.fr/hal-01547370/document
https://hal.archives-ouvertes.fr/hal-01547370/file/Acarologia-2016-56-463-484.pdf
https://doi.org/10.1051/acarologia/20164136
Description
Summary:International audience The morphological ontogeny of Melanozetes avachai n. sp. from Kamchatka Peninsula (Russia) is described and illustrated. The juveniles of this species have a humeral organ and a humeral macrosclerite, which occur in most Sphaerozetinae (Ceratozetidae), but in the larva seta c1 inserts on microsclerite, rather than on the humeral macrosclerite, which is unique in Melanozetes. The larva lacks the gastronotal shield and the gastronotal setae are inserted on microsclerites, which is unique in Melanozetes; other species have these setae inserted on the gastronotal shield. The juveniles of M. avachai also differ from congeners by the length and shape of some gastronotal setae. All instars of M. avachai have femora I and II uniquely oval in cross section; in all other species of Melanozetes at least femur II is flattened, with a ventral carina. The adult of M. avachai differs from congeners by its larger body size and longer prodorsal seta le. The translamella is variable in M. avachai; usually it is absent, but may be incomplete, or present. The diagnosis of Melanozetes is modified and enlarged with the morphological characters of juveniles.

Similar Items