A. spinosa may refer to:
Absidia spinosa, a fungus species Acanthemblemaria spinosa, a blenny species Acanthus spinosa, a flowering plant species Acanthopleura spinosa, a chiton species, a primitive marine mollusk Adejeania spinosa, a tachinid fly species Adenia spinosa, a passionflower species Agama spinosa, a small, long-tailed, insect-eating lizard species Agathosma spinosa, a small shrub species Amorphoscelis spinosa, a praying mantis species Almenia spinosa, an arthropod species Ancylotrypa spinosa, a wafer trapdoor spider species Anotheca spinosa, or Rana De Corona, a frog species Aphaenogaster spinosa, a myrmicine ant species Arachnura spinosa, an orb-weaving spider species Aralia spinosa, a woody plant species Argania spinosa, the argan, a tree species Atelidea spinosa, a long jawed spider species Auximella spinosa, a tangled nest spider species
See also Spinosa (disambiguation)