Ontogeny of morphological traits in Eupelops variatus (Mihelčič, 1957), with remarks on juveniles of Phenopelopidae (Acari: Oribatida) 

2018 ◽  
Vol 23 (1) ◽  
pp. 161
Author(s):  
Badamdorj Bayartogtokh ◽  
Sergey G. Ermilov ◽  
Umukusum Ya. Shtanchaeva ◽  
Luis S. Subías

Juvenile instars of oribatid mites of the family Phenopelopidae are well known compared to most other families, however, information on the morphological ontogeny of the majority of species is still insufficient or unknown. Comparative characteristics of immatures of species of Phenopelopidae are given based on our own data and available literature sources. The major characteristics of immature instars of 11 species are presented, and the morphological ontogeny of Eupelops variatus (Mihelčič, 1957) is investigated based on material from southern Europe. From these studies, it can be generalized that the juvenile morphologies of phenopelopid genera are quite similar and uniform. The juveniles have plicate integument, marginally flattened opisthonotum, and short gastronotic setae c1, c3 and of the d-series. The juveniles of the phenopelopid species differ from one another in morphological characters such as body size, development of the prodorsal ridges, lamellar, interlamellar as well as gastronotic setae of c2, lp and h-series either in larva or nymphs, and all these characters have species-specific value. 

Zootaxa ◽  
2019 ◽  
Vol 4656 (2) ◽  
pp. 274-286
Author(s):  
SERGEY G. ERMILOV

Three new species of oribatid mites (Oribatida) of the family Oppiidae collected from swamp moss near Laguna Parrillar National Park in Chile (Patagonia) are described. Kokoppia lagunaensis sp. nov. differs from Kokoppia inclinata, K. rafalskii and K. pectinata by the following morphological traits: body size; structure of costulae; absence of transcostula; presence of interbothridial tubercles; morphology of bothridial setae; number of solenidia on leg tarsi II. Setoppia parrillarensis sp. nov. differs from Setoppia strinovichi by the following morphological traits: body size; length of interlamellar setae; localization of notogastral setae la and adanal lyrifissures; absence of costulae. Graptoppia (Stenoppia) magallanesensis sp. nov. differs from Graptoppia (Stenoppia) italica by the following morphological traits: absence of transcostula; localization of notogastral setae la; presence of interbothridial tubercles. The species Oppia inclinata Hammer, 1962 is transferred to the genus Kokoppia and now is given as Kokoppia inclinata (Hammer, 1962) comb. nov. 


Zootaxa ◽  
2021 ◽  
Vol 4920 (1) ◽  
pp. 91-100
Author(s):  
SERGEY G. ERMILOV ◽  
ELIZABETH A. HUGO-COETZEE ◽  
ALEXANDER A. KHAUSTOV

Three new species of oribatid mites of the family Galumnidae are described from soil and coniferous litter of Hogsback State Forest, Eastern Cape Province, South Africa. Pilogalumna hogsbackensis sp. nov. differs from Pilogalumna tenuiclava and P. ornatula by the presence of elongate oval postanal porose area and narrowly unilaterally dilated bothridial head. Pergalumna amatholensis sp. nov. differs from Pergalumna distincta by the presence of smaller body size, rounded rostrum, unilaterally dilated bothridial head, one pair of notogastral porose areas Aa, and the localization of opisthonotal gland opening and lyrifissure im. Stictozetes ihaguensis sp. nov. differs from all species of the genus by presence of bothridial seta with narrowly dilated head and median pore in both genders. An identification key to known species of Stictozetes is presented. 


Acarologia ◽  
2019 ◽  
Vol 59 (4) ◽  
pp. 456-474
Author(s):  
Sergey G. Ermilov ◽  
Stanislav Kalúz

This work includes taxonomic data on two species of oribatid mites of the family Otocepheidae from Malaysia. A new species of the genus Fissicepheus is described. Fissicepheus parastriganovae n. sp. differs from Fissicepheus striganovae Ermilov and Anichkin, 2014 by body ornamentation, length of interlamellar and notogastral setae and morphology of genital plates. The species Leptotocepheus murphyi (Mahunka, 1989) is recorded in Malaysia for the first time. A supplementary description of this species which was originally described from Singapore is given on the basis of the Malaysian specimens. The main morphological traits for L. murphyi are summarized.


2020 ◽  
Vol 25 (4) ◽  
pp. 697-706 ◽  
Author(s):  
Sergey G. Ermilov ◽  
Josef Stary

Two new species of oribatid mites of the family Oppiidae collected from leaf litter in Madagascar are described. Ramuselloppia indistincta sp. nov. differs from Ramuselloppia anomala by larger body size, the presence of epimeral tubercles  and comparatively long lamellar, interlamellar and notogastral setae and the absence of costulae and heads of bothridial setae. An identification key to known species of Ramuselloppia is provided. Lanceoppia (Baioppia) rugosa sp. nov. differs from all species of the subgenus by heavily rugose posterior part of the notogaster. The genus Ramuselloppia and subgenus Lanceoppia (Baioppia) are recorded in the Ethiopian region for the first time; the species Multioppia (Hammeroppia) wilsoni is recorded in Madagascar for the first time.


2017 ◽  
Vol 22 (7) ◽  
pp. 948
Author(s):  
Sergey G. Ermilov

The first data on the oribatid mites of Myanmar are presented and these belong to the family Otocepheidae. A new species of the genus Eurostocepheus (Oribatida, Otocepheidae) is described from litter of disturbed primary forest of Nat Ma Taung National Park in the Chin State. Eurostocepheus (Eurostocepheus) peterjaegeri sp. nov. is morphologically most similar to E. (E.) mahunkai Mondal & Kundu, 1999, but differs by the shorter notogastral setae c and la compared to the other notogastral setae, setae la pressed to notogastral surface, well-developed lateral prodorsal carinae, smooth genital plates and by the presence of diagonal ridges on the anal plates. A supplementary description of Otocepheus (Otocepheus) heterosetiger Aoki, 1965 which was originally described from Thailand, is given in detail on the basis of specimens from Myanmar. The main morphological traits for this species are summarized.


2018 ◽  
Vol 23 (7) ◽  
pp. 1278
Author(s):  
Sergey G. Ermilov ◽  
Chi-Man Leong

A new species of the genus Meristolohmannia (Oribatida: Lohmanniidae) is described from litter of a secondary forest in Macao of southern China; M. macaoensis Ermilov sp. nov. differs from M. abbreviata Chen, Yang & Xie, 2010 by the comparatively longer rostral setae than the lamellar, interlamellar and posterior exobothridial setae, bothridial setae with well-developed branches, reticulate notogaster surface, number and morphology of subcapitular setae, nine pairs of genital setae and the smaller body size. An identification key to the known species of Meristolohmannia is provided. Lohmannia (Lohmannia) corallium Nakatamari, 1982 is recorded in the Oriental region for the first time; its supplementary description is provided based on material from China, and the revised diagnostic traits for this species are also proposed.


Insects ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 418 ◽  
Author(s):  
Almut Kelber ◽  
Hema Somanathan

The family Apidae, which is amongst the largest bee families, are important pollinators globally and have been well studied for their visual adaptations and visually guided behaviors. This review is a synthesis of what is known about their eyes and visual capabilities. There are many species-specific differences, however, the relationship between body size, eye size, resolution, and sensitivity shows common patterns. Salient differences between castes and sexes are evident in important visually guided behaviors such as nest defense and mate search. We highlight that Apis mellifera and Bombus terrestris are popular bee models employed in the majority of studies that have contributed immensely to our understanding vision in bees. However, other species, specifically the tropical and many non-social Apidae, merit further investigation for a better understanding of the influence of ecological conditions on the evolution of bee vision.


The Auk ◽  
1987 ◽  
Vol 104 (4) ◽  
pp. 757-765 ◽  
Author(s):  
Walter D. Koenig

Abstract There are diverse relations among ecological, morphological, and life-history traits in North American woodpeckers (family Picidae). Within the family as a whole, clutch size does not correlate with body size. However, clutch size increases with body size within the genus Melanerpes and decreases with size in Picoides. In the family as a whole, species that specialize on wood-boring larvae have small clutches. Such species use pecking as a major foraging technique, and pecking is associated with a wide suite of morphological specializations, including relatively wide first ribs, long pygostyle disks, short tibia, wide crania, wide maxillae, long mandibular symphyses, less cranial kinesis, and greater culmen sexual dimorphism. Hence, these morphological characters also correlate with clutch size, in two cases (length of the mandibular symphysis and cranial kinesis) even after controlling for both body size and generic effects. The observed correlations between clutch size and morphology are probably the result of dietary influences. These correlations, however, may at least in part be due to morphological constraints. Morphological design may thus constrain life-history evolution at the intrafamilial and intrageneric levels as well as at higher taxonomic levels.


2019 ◽  
Vol 24 (2) ◽  
pp. 287 ◽  
Author(s):  
Sergey G. Ermilov ◽  
Elizabeth Hugo-Coetzee

The present study is based on oribatid mite material (Acari, Oribatida) collected from soil of Kaaimansgat estuary, Wilderness, Western Cape, South Africa in 2018. A list of identified taxa, including 41 species from 34 genera and 23 families, is presented; of these, nine species, three genera and one family are recorded in South Africa for the first time. Two new species belonging to the family Oppiidae are described: Kokoppia kaaimansensis sp. nov. differs from Kokoppia dudichi (Balogh, 1982) by the larger body size, the medium sized lamellar and interlamellar setae, the presence of muscle sigillae in the interlamellar region and the distinctly semi-oval epimeral borders IV and the absence of notogastral setae c; Paroppia neethlingi sp. nov. differs from other species of the genus by the localization of adanal lyrifissures in a direct apoanal position and the absence of epimeral borders IV. Revised generic diagnoses and identification keys to the known species of Kokoppia and Paroppia are presented.


2020 ◽  
Vol 25 (6) ◽  
pp. 1158-1168
Author(s):  
Sergey G. Ermilov ◽  
Nikolay A. Ryabinin

Two new species of oribatid mites of the family Damaeidae collected from the Russian Far East, are described. Belbodamaeus gobilliensis sp. nov. is most similar to Belbodamaeus rarituberculatus Bayartogtokh, 2004, but differs from the latter by the larger body size, the absence of propodolateral apophyses and ventrosejugal tubercles, and the presence of prodorsobasal tubercles Ba, neotrichy on epimere II and five setae on femora III and IV. Epidamaeus chopeensis sp. nov. is most similar to Epidamaeus nortoni Bayartogtokh, 2004, but differs from the latter by the smaller body size, the presence of comparatively long and narrowly phylliform dorsal notogastral setae, parastigmatic apophyses Sa and leg tarsi formula 22-18-18-15, and the absence of thick setae on leg segments.


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