Definition of "sp."

In this paper a second larval species of Nothrotrombidium, N. treati sp. nov., is described from a noctuid moth in North America.

1987 May 29, R. V. Southcott, “The classification of the mite families Trombellidae and Johnstonianidae and related groups, with the description of a new larva (Acarina: Trombellidae: Nothrotrombidium) from North America”, in Transactions of the Royal Society of South Australia, volume 3, part 1 (in English), Adelaide, S.A.: The Society, page 26, column 1

Fagus sylvatica (European beech) and Acer saccharum (sugar maple, from North America) are very tolerant of deep shade, while Betula spp. (birches) and Populus spp. (poplars) grow best under high light intensities.

2011, Peter A. Thomas, “General Forest Ecological Processes: Chapter 10 from Trees and Forests, a Color Guide”, in Arnoldia, volume 68, number 3 (in English), Boston, MA: Arnold Arboretum of Harvard University, page 22