Belongs within: Parasitidae.
Pergamasus is a genus of predatory mites found primarily in stable habitats such as forest and grassland soils. They are among the most prominent predatory mites in Palaearctic soils, being replaced by the Rhodacaridae in tropical regions (Bhattacharyya 1963). Females of this genus have the peritrematic shield fused with the holodorsal shield and both sexes have the opisthonotal region of the dorsal shield densely setose.
The holodorsal shield bears more than thirty pairs of setae in females and more than 45 pairs of setae in males of the subgenus Pergamasus whereas a maximum of 25 pairs are present in females and 35 pairs in males of Paragamasus (Evans & Till 1979). A group of species with the peritrematic shield free from the holodorsal shield posteriorly in females and two teeth on the movable digit of the chelicera in males has historically been recognised as a distinct genus Amblygamasus (Evans & Till 1979).
<==Pergamasus Berlese 1903H98 |--P. (Pergamasus)B63 [incl. Amblygamasus Berlese 1903B63, FH93, Plesiogamasus Hull 1918B63] | |--*P. (P.) crassipes (Linnaeus 1758)S61 (see below for synonymy) | |--‘Amblygamamasus’ basileus Schweizer 1961S61 | |--P. (P.) decipiens (Berlese 1904)S22, B63 [=Gamasus (P.) decipiensS22, Paragamasus decipiensB63] | |--‘Amblygamasus’ dentipes (Koch 1839)B63 | |--P. (P.) hamatus (Koch 1839)B63, D91 (see below for synonymy) | |--P. (P.) hortensis Bhattacharyya 1963B63 | |--P. (P.) longicornis (Berlese 1906)FH93 (see below for synonymy) | |--P. (P.) mirabilis Willmann 1951B63, FH93 [=Amblygamasus mirabilisS61] | |--P. (P.) noster [=Gamasus (P.) noster]S22 | |--‘Plesiogamasus’ paripes (Hull 1918)B63 | |--P. (P.) parvulus (Berlese 1903)S22, B63 (see below for synonymy) | |--P. (P.) probsti [=Gamasus (P.) probsti]S22 | |--P. (P.) quisquiliarum (Canestrini & Canestrini 1882)S22, H98 (see below for synonymy) | |--P. (P.) runcatellus (Berlese 1903)FH93 (see below for synonymy) | |--P. (P.) septentrionalis (Oudemans 1902)B63, FH93 (see below for synonymy) | |--‘Amblygamamasus’ telluricus Hennessey & Farrier 1989FH93 | |--P. (P.) theseusS22 [=Gamasus (P.) theseusS22; incl. P. theseus var. alpinusS61] | `--P. (P.) tiberinus (Can. 1884)E57, ET79 [=Gamasus tiberinusET79, Pergamasus (*Amblygamasus) tiberinusE57] `--P. (Paragamasus Hull 1918)B63 [incl. Leptogamasus Trägårdh 1936B63, FH93] |--P. (*P.) robustus (Oudemans 1902)S61, ET79 [=Parasitus longulus var. robustusB63, Gamasus (Pergamasus) robustusB63] |--P. (P.) alpestris (Berlese 1904) [=Gamasus (Pergamasus) alpestris; incl. P. alpestris var. coniger Hull 1916]B63 |--P. (P.) alstoni Bhattacharyya 1963 [=Leptogamasus alstoni]FH93 |--P. (P.) ‘armatus’ (Halbert 1915) [=Gamasus (Pergamasus) runciger var. armatus non G. armatus Koch 1879]B63 |--P. (P.) cambriensis Bhattacharyya 1963B63 |--P. (P.) cassiteridum Bhattacharyya 1963B63 |--P. (P.) celticus Bhattacharyya 1963B63 |--P. (P.) conus Karg 1971D91, S07 |--P. (P.) diversus (Halbert 1915) [=Gamasus (Pergamasus) diversus]B63 |--P. (P.) femoratus Bhattacharyya 1963B63 |--P. (P.) integer Bhattacharyya 1963B63 |--P. (P.) lapponicus Trägårdh 1910B63 [=Gamasus (Pergamasus) lapponicusS22] |--P. (P.) leruthi Cooreman 1951B63 |--P. (P.) londonensis Bhattacharyya 1963B63 |--P. (P.) longisetosus Bhattacharyya 1963B63 |--P. (P.) minimus Bhattacharyya 1963B63 |--‘Paragamasus’ minor (Berlese 1892)B63 |--P. (P.) misellus (Berlese 1904) [=Gamasus (Pergamasus) misellus]B63 |--P. (P.) nathistmus Bhattacharyya 1963B63 |--P. (P.) parrunciger Bhattacharyya 1963B63 |--P. (P.) rothamstedensis Bhattacharyya 1963B63 |--P. (P.) runciger (Berlese 1904) [=Gamasus (Pergamasus) runciger]B63 |--P. (P.) schweizeri Bhattacharyya 1963B63 |--P. (P.) suecicus (Trägårdh 1936)B63 [=*Leptogamasus suecicusE57] |--P. (P.) teutonicus Willmann 1956 [=P. lapponicus var. teutonica]B63 |--P. (P.) truncus Schweizer 1961B63 |--P. (P.) vagabundus (Karg 1968)Koe91, S07 `--P. (P.) wasmanni (Oudemans 1902) [=Parasitus wasmanni]B63 Pergamasus incertae sedis: P. aequicornis Athias-Henriot 1967FH93 P. barbarus (Berlese 1905) [=Gamasus barbarus]H98 P. basileus Schweizer 1961S61 P. brevicornisK09 P. cornutus Schweizer 1961S61 P. crassicornutusD91 P. cuneatusD91 P. diessenhofenerus Schweizer 1961S61 P. digitulus Karg 1963Koe91 P. elegantulus Schweizer 1961S61 P. forazi Schweizer 1961S61 P. germanicusD91 P. helveticus Schweizer 1961S61 P. homopodoides Athias-Henriot 1967D91 P. humusorum Schweizer 1961S61 P. johnstoni Oudemans 1936 [=Gamasus marginatus Johnston 1848 non Latr. 1806]B63 P. lobatusKoh91 P. neorunciger Schweizer 1961S61 P. obesusKoh91 P. oxygynellusS61 P. perlongum Schweizer 1961S61 P. petrophilus Schweizer 1961S61 P. pinetum Schweizer 1961S61 P. plenuspollex Schweizer 1961S61 P. processiferus Halbert 1915B63 P. serratulus Schweizer 1961S61 P. trupchumi Schweizer 1961S61 P. valesianusS61 P. vargasi Gorirossi 1955FH93 P. xerothermus Schweizer 1961S61 Nomina nuda: Pergamasus arcuatus Dielmann 1991D91 Pergamasus carniolus Dielmann 1991D91 Pergamasus italicus Dielmann 1991D91 Pergamasus minutissimus Dielmann 1991D91 Pergamasus turriger Dielmann 1991D91
*Pergamasus (Pergamasus) crassipes (Linnaeus 1758)S61 [=Acarus crassipesS61, Gamasus (P.) crassipesS22, Siro crassipesG00; incl. Gamasus agilisCF77, Pergamasus crassipes var. alsacienne Dielmann 1991 (n. n.)D91, G. equestrisCF77, G. fungorumCF77, G. quinquespinosusCF77, Acarus testudinarius Hermann 1804CF77, G00, Gamasus testudinariusCF77, Siro testudinariusG00]
Pergamasus (Pergamasus) hamatus (Koch 1839)B63, D91 [=Gamasus (Pe.) hamatusS22, P. (*Plesiogamasus) hamatusE57; incl. Gamasus (Pergamasus) hamatus var. gracilis Berlese 1906B63, Pergamasus hamatus var. longipes Schweizer 1961S61]
Pergamasus (Pergamasus) longicornis (Berlese 1906)FH93 [=Gamasus (Pergamasus) crassipes var. longicornisFH93; incl. Amblygamasus septentrionalis belgicus Cooreman 1943B63, G. (Pe.) magnicornutus Ewing 1909FH93, G. (Parasitus) predator Banks 1910FH93]
Pergamasus (Pergamasus) parvulus (Berlese 1903)S22, B63 [=Gamasus (P.) parvulusS22, Plesiogamasus parvulusB63; incl. Pergamasus parvulus var. denticulatus Schweizer 1961S61, Gamasus (Pergamasus) parvulus var. dilatellus Berlese 1906S22, B63, Plesiogamasus parvulus var. dilatatellusB63]
Pergamasus (Pergamasus) quisquiliarum (Canestrini & Canestrini 1882)S22, H98 [=Gamasus quisquiliarumH98; incl. P. crassipes var. australicus Womersley 1942H98]
Pergamasus (Pergamasus) runcatellus (Berlese 1903)FH93 [=Gamasus (P.) runcatellusFH93, Paragamasus runcatellusB63; incl. Pergamasus neoruncatellus Schweizer 1961FH93]
Pergamasus (Pergamasus) septentrionalis (Oudemans 1902)B63, FH93 [=Gamasus (Amblygamasus) septentrionalisS22; incl. A. septentrionalis var. bodanicus Schweizer 1961S61, G. attenuipes Banks 1910FH93, A. septentrionalis var. germanicusS61, A. septentrionalis var. helveticus Schweizer 1961S61, Gamasus (Amblygamasus) septentrionalis var. norvegicus Berlese 1906B63, Pergamasus (Thenargamasus) norvegicusFH93, Hologamasus quinquedentatus Ewing 1920FH93]
*Type species of generic name indicated
References
[B63] Bhattacharyya, S. K. 1963. A revision of the British mites of the genus Pergamasus Berlese s.lat. (Acari: Mesostigmata). Bulletin of the British Museum (Natural History): Zoology 11 (2): 133–241.
[CF77] Canestrini, G., & F. Fanzago. 1877. Intorno agli Acari Italiani. Atti del Reale Istituto Veneto di Scienze, Lettere ed Arti, Serie 5, 4: 69–208, pls 2–7.
[D91] Dielmann, M. 1991. Computer in acarine taxonomy: a method for systematical analysis of the genus Pergamasus (Acari: Mesostigmata). In: Dusbábek, F., & V. Bukva (eds) Modern Acarology: Proceedings of the VIII International Congress of Acarology, held in České Budĕjovice, Czechoslovakia, 6–11 August 1990 vol. 2 pp. 239–248. SPB Academic Publishing: The Hague.
[E57] Evans, G. O. 1957. An introduction to the British Mesostigmata (Acarina) with keys to families and genera. Journal of the Linnean Society of London, Zoology 43: 203–259.
[ET79] Evans, G. O., & W. M. Till. 1979. Mesostigmatic mites of Britain and Ireland (Chelicerata: Acari-Parasitiformes). An introduction to their external morphology and classification. Transactions of the Zoological Society of London 35: 139–270.
[FH93] Farrier, M. H., & M. K. Hennessey. 1993. Soil-inhabiting and free-living Mesostigmata (Acari-Parasitiformes) from North America: an annotated checklist with bibliography and index. North Carolina Agricultural Research Service, North Carolina State University, Technical Bulletin 302: i–xvi, 1–408.
[G00] Giribet, G. 2000. Catalogue of the Cyphophthalmi of the world (Arachnida, Opiliones). Revista Ibérica de Aracnología 2: 49–76.
[H98] Halliday, R. B. 1998. Mites of Australia: A checklist and bibliography. CSIRO Publishing: Collingwood.
[Koe91] Koehler, H. H. 1991. The impact of aldicarb on the succession of Gamasina; a one year study. In: Dusbábek, F., & V. Bukva (eds) Modern Acarology: Proceedings of the VIII International Congress of Acarology, held in České Budĕjovice, Czechoslovakia, 6–11 August 1990 vol. 2 pp. 749–758. SPB Academic Publishing: The Hague.
[Koh91] Kohn, M. 1991. Influence of the refuse dump biotopes on ecology of some gamasoid mites and ticks. In: Dusbábek, F., & V. Bukva (eds) Modern Acarology: Proceedings of the VIII International Congress of Acarology, held in České Budĕjovice, Czechoslovakia, 6–11 August 1990 vol. 1 pp. 199–204. SPB Academic Publishing: The Hague.
[K09] Krantz, G. W. 2009. Form and function. In: Krantz, G. W., & D. E. Walter (eds) A Manual of Acarology 3rd ed. pp. 5–53. Texas Tech University Press.
[S22] Schweizer, J. 1922. Beitrag zur Kenntnis der terrestrischen Milbenfauna der Schweiz. Verhandl. Naturf. Ges. Basel 33: 23–112, 4 pls.
[S61] Schweizer, J. 1961. Die Landmilben der Schweiz (Mittelland, Jura und Alpen): Parasitiformes Reuter, mit 246 Arten und Varietäten und 268 meist kombinierten Originalzeichnungen. Denkschriften der Schweizerischen Naturforschenden Gesellschaft [Mémoires de la Société Helvétique des Sciences Naturelles] 84: i–vii, 1–207.
[S07] Skorupski, M. 2007. Influence of species composition of tree stands for soil inhabiting mites from the family Parasitidae and suborder Uropodina (Acari: Mesostigmata). In: Morales-Malacara, J. B., V. M. Behan-Pelletier, E. Ueckermann, T. M. Pérez, E. G. Estrada-Venegas & M. Badii (eds) Acarology XI: Proceedings of the International Congress pp. 193–196. Instituto de Biología and Faculdad de Ciencias, Universidad Nacional Autónoma de México, Sociedad Latinoamericana de Acarología: México.