Sinoseius lobatus Bai, Gu & Fang, 1995,

Masan, Peter, 2017, A revision of the family Ameroseiidae (Acari, Mesostigmata), with some data on Slovak fauna, ZooKeys 704, pp. 1-228: 1

publication ID

publication LSID

persistent identifier

treatment provided by

ZooKeys by Pensoft

scientific name

Sinoseius lobatus Bai, Gu & Fang, 1995


Sinoseius lobatus Bai, Gu & Fang, 1995  Plates 73, 74, 75

Sinoseius lobatus  Bai, Gu & Fang, 1995: 436.

Sinoseius pinnatus  Huhta & Karg, 2010: 335. Syn. n.

Sinoseius pinnatus  . - Fenďa and Lukáš 2014: 174.

Type depository.

Of Sinoseius lobatus  - Institute of Endemic Disease Control, Ningxia Autonomous Region, Yinchuan, China; of Sinoseius pinnatus  - Zoological Museum, University of Turku, Finland; Senckenberg Museum für Naturkunde, Görlitz, Germany; Zoological Museum, University of Helsinki, Finland.

Type locality and habitat.

Of Sinoseius lobatus  - China, Ningxia Autonomous Region, Haiyuan County, on long-tailed dwarf hamster, Cricetulus longicaudatus  ( Mammalia  , Rodentia  , Cricetidae  ); of Sinoseius pinnatus  - Finland, Parainen, Sunnaberg, bottom of straw shed.

Comparative material.

Finland: 2 ♀♀ ( ZMT: ACA.MES.FIN.3.654, holotype and paratype) - 10. 10. 1982, Parainen, Sunnaberg, bottom of straw shed, leg. P. T. Lehtinen (labelled Sinoseius pinnatus  ).

Published and verified material from Slovakia.

Čierna Hora Mts.: Veľký Folkmar Village, Ružín Dam; Veľký Folkmar Village, Veľká Hoľa Cave ( Fenďa and Lukáš 2014, cited as Sinoseius pinnatus  ).


The first European finding of the genus Sinoseius  was that of Huhta and Karg (2010) from Finland (bottom of straw shed and grass in garden of old farm). Fenďa and Lukáš (2014) found the species in a frozen nest of Sitta europaea  Linnaeus, 1758 ( Aves  , Passeriformes  ), in a nest box, and in a soil sample from the dysphotic zone of a cave. I have compared the holotype and one paratype of Sinoseius pinnatus  with the specimens reported from Slovakia by Fenďa and Lukáš (2014), and found that they are clearly conspecific. According to Huhta and Karg (2010), Sinoseius lobatus  and S. pinnatus  can be distinguished by the features presented as follows: in S. lobatus  , dorsal setae "remarkably long", j5 = j5-j6, j6 > j6-J2, tines of dorsal setae strong (depicted seven pairs of tines), anal shield distinctly wider than long (length/width = 2:3), corniculi bifid; in S. pinnatus  , dorsal setae „moderate“, j5 = 2/3 × j5-j6, j6 < j6-J2, tines of dorsal setae very thin (depicted up to 19 instead of 9-10 pairs of tines), anal shield only a little wider than long, corniculi distally trifid. It is clear that the distinctions made in the original descriptions and differential diagnosis of S. pinnatus  by Huhta and Karg (2010) are based on characteristics that are misinterpreted (form of setae and corniculi) or vary considerably (relative length of dorsal setae, proportion of anal shield), and I do not hesitate to propose the synonymy of both mentioned species, although no types of S. lobatus  were examined in this study. When compared the Slovak specimens of Sinoseius  with quite adequate original illustrations of S. lobatus  from China, it was not possible to find reliable distinguishing characters between them.














Sinoseius lobatus Bai, Gu & Fang, 1995

Masan, Peter 2017

Sinoseius lobatus

Bai & Gu in Bai, Gu & Fang 1995

Sinoseius pinnatus

Bai & Gu in Bai, Gu & Fang 1995

Sinoseius pinnatus

Bai & Gu in Bai, Gu & Fang 1995