| aff. - 5 | coxa (pl. coxae) |
| agendum (pl. agenda) | criterion (pl. criteria) |
| alga (pl. algae) | dates (how to write) - 16 |
| alumna [female] (pl. alumnae) | decades (how to write) - 2.01 |
| alumnus [male] (pl. alumni [males, and also males and females]) | datum (pl. data) |
| antenna (pl. antennae) | different (its unnecessary use) - 1.07 |
| apostrophe (its erroneous use) - 2.01 | e.g. - 5 |
| auct. - 5 | elytron (pl. elytra) |
| bacterium (pl. bacteria) | equivalence (of scientific and vernacular names) - 2.02 |
| basis (as in "on a daily [weekly, monthly, annual] basis") - 1.10 | et al. - 5 |
| both ( its unnecessary use) - 1.05 | etc. - 5 |
| ca. - 5 | ex. - 5 |
| cercus (pl. cerci) | exx. - 5 |
| cf. - 5 | exuviae (this is plural - there is no singular) |
| chrysalis (pl. chrysalids or chrysalides) | family names (of animals) - 6 |
| cilium (pl. cilia) | family names (of plants) - 6 |
| common names - 8 | feces or faeces (this is plural - there is no singular) |
| corpus (pl. corpora) | femur (pl. femora) |
| flagellum (pl. flagella) | maxilla (pl. maxillae) |
| foramen (pl. foramina) | medium (pl. media) |
| fungus (pl. fungi) | mosquito (pl. mosquitoes) |
| ganglion (pl. ganglia) | names of authors of species names - 7.7, 7.8 |
| genus (pl. genera) | names of people - 15 |
| id. - 5 | n.b. - 5 |
| i.d. (is English shorthand, not Latin, and means identification) | number (as in "a number of ... were") - 1.02 |
| i.e. - 5 | ocellus (pl. ocelli) |
| impact (jargon use of this word) - 1.08 | ommatidium (pl. ommatidia) |
| indet. - 5 | operculum (pl. opercula) |
| in litt. - 5 | ovum (pl. ova) |
| kind - 12 (use this word to avoid technical use of the words species, type, and variety) | p. - 5 |
| labium (pl. labia) | palpus (pl. palpi) |
| labrum (pl. labra) | phytotelma (pl. phytotelmata) |
| lamella (pl. lamellae) | point in time - 1.01 |
| larva (pl. larvae) | pp. - 5 |
| loc. cit. - 5 | palpus (pl. palpi) |
| majority (prefer to write "most") - 1.13 | presently (its unnecessary use) - 1.12 |
protozoon or protozoan (pl. protozoa) stemma (pl. stemmata) pupa (pl. pupae) stigma (pl. stigmata) q.v. - 5 sternum (pl. sterna) Roman numerals - 16.7 stoma (pl. stomata) sensillum (pl. sensilla) subspecies names - 6 seta (pl. setae) tarsus (pl. tarsi) s.1. - 5 taxon (pl. taxa) sort - 12 (see also kind) tergum (pl. terga) sp. - 5 tibia (pl. tibiae) species (pl. species) total (its erroneous use) - 1.03 species (does not mean the same as "type" or "variety") - 6 tympanum (pl. tympana) species names - 6, 7 type (its meaning in biology) - 6.8 species (how a species name is formed) - 9 underway (a misuse) - 1.14 sp. nov. - 5 utilize, utilized, utilization - 1.15 spp. - 5 variety (as in "a variety of ... were") - 1.04 spp. nov. - 5 variety (its meaning in biology) - 6.7 ssp. - 5 variety (its misuse by non-biologists) - 6 sspp. - 5 vernacular names - 8 s. str. - 5 viz. - 5