A guide to Oribatid Identification for the ABMI: - Royal Alberta Museum

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Almanac of Alberta Oribatida 2.3 13 January 2013World species: A rough estimate of the number of species assigned to the genus, usually only thedescribed species, but undescribed species when known. Because generic limits vary withtaxonomists, and new species are constantly being described or transferred between genera,this number will always be a rough estimate.Comments: Notes of interest.Canadian species listed on DOC (bold = AB): The published records for Canada listed on theDiversity of Oribatida in Canada website as of 2004. Alberta records are bold font.Format for species recordsGenus species Authority, Year (Bold font indicates confirmed AB record, asterisks areexplained above)Also Known As: Other names by which this species has been reported (major names, not anexhaustive listing) including earlier versions of my list of Alberta Oribatida.ABMI code/Common name: 7 letter code (see above).Diagnostic characters: Telegraphic listing of useful diagnostic charactersOverview: Summary of main points of interest for the species.Barcodes: Sites with specimens that have had the mitochondrial cox1 gene (barcode)characterized by the Barcode of Life Data Systems (BOLD)ID Check: Initials of who (DEW = the author; VBP = Valerie Behan-Pelletier; RAN = Roy A.Norton; DKK = Derrick K. Kanashiro, ZL = Zoë Lindo) made or checked the speciesdetermination and the supporting literature.NB - All determinations of genus group names follow the keys written by Norton & Behan-Pelletier (unpublished) for use at the Ohio State University Summer Acarology Programunless these have been modified in Norton & Behan-Pelletier (2009) or other recentpublications. Additionally, Balogh & Balogh (2002) was consulted when needed.Similar taxa: A brief discussion of other species that may be confused with this species.ABMI Site Records: A list of the ABMI sites (including the off-grid sites of Diane Haughland)by year at which this species has been identified. Exact site location is not available, but toquote the ABMI website: “ABMI’s precise geographic survey coordinate is within 5.5 kmof the public geographic coordinate”. These public geographic coordinates are available asan Excel spreadsheet (137 kb) from the Survey Site Locations:http://www.abmi.ca/abmi/home/home.jspDOC (1/2008): [+other] Distribution: The previously known Canadian distribution of the speciesfrom the Diversity of Oribatida in Canada (DOC) websitehttp://www.cbif.gc.ca/spp_pages/mites/phps/f_e.phpFollowed by any additional distributional information available in square brackets [ ]Images: List of sites from which Scanning Electron Micrograph images (SEM), Lightmicroscope Micrographs (LM); or Line Drawings (LD) have been made.14
Almanac of Alberta Oribatida 2.3 13 January 2013Ecology: A summary of what is known of the habitat, feeding, and reproductive ecology.Classification as mesophilous or xerophilous follows Behan-Pelletier & Bissett (1994).Literature: Relevant literature (see References)Back to Table of ContentsMorphology of Oribatid MitesA Note on Terminology and NotationsLike most sciences, Acarology is awash is specialized terms. Unfortunately, much of this jargonhas been used idiosyncratically with various acarologists and their followers developing theirown terms or notations for the same structures. As in everyday language, the meaning of theseterms may change over time or a term for one structure may be co-opted to another. Many of theterms are derived from Latin or Greek or some imperfect knowledge of these classical languages.For example, the seta that emerges from the supposed anemosensory complex (trichobothrium)on the prodorsum of most oribatid mites is variously known as a bothridial sensillum, bothridialseta, pseudostigmatic organ, sensillus (an incorrect formation, but now standard in oribatology),sensillum, ss, or bo. Another example is ‘exuviae’ (as with ‘clothes’ this is both the singular andthe plural), the term for the cuticular remnant an arthropod casts during a moult, that may appearas exuvia (an incorrect singular formation), exuvium (another incorrect singular formation), orscalps (a term used for the notogastral exuvial remnants carried by some oribatid mites).Over recent decades there has been a trend towards standardization and simplification of theterms and notations used for oribatid mites. The works of François Grandjean (1882-1975), aformer professor of mineralogy who produced a massive, detailed, and more or less internallyconsistent body of work (http://www.annales.org/archives/x/grandjean.html), provide thestandard notations. So, for example, Grandjean developed signatures for each seta on the body ofearly derivative oribatid mites based on the segmental origin and position. He also devisedspecial designations for setae of unknown homology (e.g. the ‘unideficient’ designations forsome notogastral setae). As oribatologists develop hypotheses about the homology of theuncertain setae, these notations will be replaced by the standard notations. The modern equivalentof Latin, English, is being used to ‘simplify’ some of the Latin or Greek terms when they can bereplaced by less jargonistic words. Thus, terms like ‘area porosae’ become ‘porose areas’,‘epimera’ ‘epimeres’, and ‘sacculi’ ‘saccules’. Still, many terms cannot be simplified, the olderliterature contains the full jargonistic range, and, as I can personally attest, it is difficult to teachan old acarologist new terms. As much as possible, I am following the terminology used inNorton & Behan-Pelletier (2009). Additionally, the reader is directed to the illustrated andsearchable glossary of morphological terms by RAN that was included on the CD-ROM AnInteractive Key to the Oribatid Mites of Australia (Hunt et al. 1998).I am also developing a Glossary to cover my own lapses and to assist the end-user with theterms in the literature. Hopefully, with each revision or new edition of the Almanac the use ofspecialized terms and notations will become more internally consistent.15
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A guide to Oribatid Identification for the ABMI: - Royal Alberta Museum

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