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name itself to avoid ambiguity (e.g., Subphylum Echinozoa). Arrangement of families is phylogenetic
when information is available, and alphabetic otherwise. Genera, and species within them, are
arranged alphabetically within each family or subfamily, as appropriate. Authorship is attributed in
conformance with ICZN rules. The listing of genus-level identifications (e.g., Bimeria sp) represents
the degree to which the identities of these taxa are known in the region. This form is also used in
cases where the only specimens representing the genus were indeterminable due to absence of
diagnostic characters. It is regional practice in monitoring programs to identify some groups of
organisms at family or higher level. An example is harpacticoid copepods, which are reported at the
ordinal level. For these taxa the term unidentified appears in the binomen position. The level at
which they are typically reported is indicated by the lowest level taxon provided in the hierarchy.
The degree of detail in the use of higher taxonomic categories varies between groups. In groups
where there are both large numbers of species and wide variations in form, numerous categories are
listed between the phylum and genus level (arthropods, for example). In poorly represented groups
with few species (e.g., cephalochordates) there may be few categories listed between phylum and
family.
To assist in navigation the list is line-numbered and an index to all names in the list (including
synonyms) with their corresponding line numbers is provided. Within the list the following
typographic conventions have been employed:
PHYLUM LEVEL IS ALL CAPS
Family and Subfamily levels are bolded
Genus and species are in italics
Synonyms are indented below currently accepted binomens and not italicized
Included in the list are a number of unpublished provisional species names erected by workers in the
area. These names are applied to organisms suspected of being new species or whose identities cannot
be determined from available literature. Provisional names are typically in the form of a genus name
followed by the word species (abbreviated as sp) and an alphabetic, alphanumeric, or numeric
designator. In provisional binomens, the generic level name is italicized, while the specific name is
not. Synonyms are left un-italicized to help clarify their status. In cases where the allocation of a
taxon is uncertain, the levels at which uncertainty exists are indicated (e.g., family uncertain, suborder
uncertain, etc.). Ideally, a provisional name is provided as a temporary designation pending
resolution of the organism's identity through further research or publication. In practice, many have
become long standing, stable, and widely recognized taxa names within the region. Of the 298
unpublished provisional taxa included in Edition 6, some date back to the 1970’s. Many of the
provisional taxa recognized by SCAMIT member taxonomists have now been described either by the
members themselves or by other taxonomists. You will find them on this list as synonyms of the
formally described taxa. All listed provisionals have been subject to examination and their
descriptions distributed through the activities of SCAMIT (1982 to present) or its antecedent, the
SCCWRP Taxonomic Standardization Program (1973-1980). For these reasons, as well as the
significant proportion (9.5 %) of the listed taxa they represent, these provisional species names are
included in the list. The unpublished provisional names are distinguished from formally erected
species and provisional names published in the literature by the symbol § following the author.
Authorship is attributed for provisional names to tie them to specific diagnoses. Attribution of
authorship of these unpublished names does not follow a rule of priority, but attempts to indicate the
most recent and/or complete source of information regarding the species. The date provided
represents the date of distribution of diagnoses or descriptions. Provisional species names for which
there is no regional recognition or available diagnoses are not included. These are numerous, and
usually become provisional names whose usage is regionally standardized as voucher sheets on them
are distributed.
Edition 6 5 1 July 2011