The adult and immature stages of the new species of the genus Demodex (Acariformes: Demodecidae) with data on parasitism, topography, and topical specificity of demodecid mites in the yellow-necked mouse Apodemus flavicollis (Rodentia: Muridae)

Joanna Nina Izdebska , Leszek Rolbiecki , Sławomira Fryderyk , Łukasz Mierzyński


Demodex mollis n. sp. is described from the yellow-necked mouse Apodemus flavicollis (Melchior, 1834) from Poland. It is a medium-sized demodecid mite (adult stages are on average 249 µm long) observed in the skin of the eyelid area. The new species is most similar to two other species occupying similar microhabitat in hosts of the same genus - Demodex lacrimalis Lukoschus and Jongman, 1974 from Apodemus sylvaticus Linnaeus, 1758 and Demodex huttereri Mertens, Lukoschus and Nutting, 1983 from Apodemus agrarius (Pallas, 1771), but differs by the following features: the terminal palpi are equipped with 3 spines, including 1 large claw-like and the second single; subgnathosomal setae (setae n) are situated on both sides of the anterior side of the pharyngeal bulb; claws on the leg tarsi are bifurcated and each equipped with large subterminal spur and proximal pointed projection; the opisthosoma is soft and flexible; and aedeagus in males have different shape and localization. The differences also relate to sexual dimorphism. Males are more robust and stocky, epimeral plates I and IV are connect at the midline part of the podosoma, and epimeral plates II and III are separated. Females are slender, epimeral plates I-III are connect at the midline of the podosoma, and epimeral plates IV are fused in 1 plate. The new species was noted in 22.5% of mice, with a mean intensity of 7.0 parasites per host. The topography of demodecid mites was also analyzed in the skin of A. flavicollis, and also Demodex corniculatus Izdebska, 2012 was observed in the hairy skin of the bodies of all the examined mice.
Author Joanna Nina Izdebska (FB / DIZP)
Joanna Nina Izdebska,,
- Department of Invertebrate Zoology and Parasitology
, Leszek Rolbiecki (FB / DIZP)
Leszek Rolbiecki,,
- Department of Invertebrate Zoology and Parasitology
, Sławomira Fryderyk (FB / DIZP)
Sławomira Fryderyk,,
- Department of Invertebrate Zoology and Parasitology
, Łukasz Mierzyński (FB / DIZP)
Łukasz Mierzyński,,
- Department of Invertebrate Zoology and Parasitology
Other language title versions
Journal seriesJournal of Parasitology, ISSN 0022-3395, (A 20 pkt)
Issue year2017
Publication size in sheets0.3
ASJC Classification1105 Ecology, Evolution, Behavior and Systematics; 2405 Parasitology
Languageen angielski
Score (nominal)20
Score sourcejournalList
ScoreMinisterial score = 20.0, 28-01-2020, ArticleFromJournal
Publication indicators WoS Citations = 2; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 0.878; WoS Impact Factor: 2017 = 1.395 (2) - 2017=1.273 (5)
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