Table 2.

Counts and descriptions of plant microfossils recovered from the calculus from the teeth of Spy I and Spy II

Tooth no.	Type 1 USO	Type 2	Type 3	Type 4 Andropogoneae?	Type 5	Type 6	Other	Dmg/Enc	Totals
Spy II RM3 578f	1					1	1	1	4
Spy II RP4 577i	27	2	1	6	9	3	13	21	82
Spy I LP4 11H				1	1			2	4
Spy I RM1 580c	32	1	1	2	4	1	3	1*	45*
Totals per type	60	3	2	9	15	5	17	25	136

Type 1: Large, oval to egg shaped to avocado shaped, ovoid in 3d, hilum very eccentric, usually at the thinner end of the oval. Hilum is marked with a fissure or dimple of varying forms: small dimple, single transverse fissure, one transverse and one longitudinal fissure, or X-shaped fissure. Lamellae are quite visible, most often at the end opposite the hilum. Occasional small surface dimples are shown. Cross arms are clear and smoothly bending across the surface of the grain. Type 2: Medium, clamshell shaped with eccentric, dimpled hilum near bulging long side. Cross is clean, with straight arms. Type 3: Two tightly compound grains, with the juncture between the two unclear. The overall shape is ovoid, whereas each grain is hemispherical. The hila are centric and unmarked. Type 4: Small to medium, subangular/faceted with slightly eccentric dimpled/open hilum, usually but not always marked with a deep single, Y-shaped or stellate fissure; cross arms are clean but usually bend over facets. Sometimes two grains are seen still in compounds. Type 5: Small, spherical to ovoid, center hilum that is sometimes marked with a dimple or a dimple and fissure. Cross arms are clean and straight across. Type 6: Large, very irregular, usually ovoid to subrounded, with deep lines and cracks radiating from the hilum, which is slightly off center and usually raised above the rest of the grain. Overall the starch appears to have a “volcano” shape. Other: A variety of unique/unusual forms that do not fit into the other types. Dmg/Enc: A variety of starches that may belong to one of the named types but are too damaged (cracked, broken) or encrusted (covered in calculus material) to be confidently identified.

*This sample includes a large clump of calculus with up to 30 starches embedded in it. Some of the starches appeared to be similar to type 1, but were too encrusted to be accurately identified, and have not been included in the overall counts for this sample.