Terminology - Arkell et al. (1957) Ammonoidea - Treatise
Takenori Sasaki XؖҒqTTL^Pm
http://www.um.u-tokyo.ac.jp/hp/sasaki/index.htm
Arkell, W. J., Kummel, B., Miller, A. K. and Wright, C. W. 1957. Morphological terms applied to Ammonoidea. pp. 2-6. In: Arkell, W. J., Furnish, W. M., Kummel, B., Miller, A. K., Moore, R. C., Schindewolf, O. H., Sylvester-Bradley, P. C. & Wright, C. W. Treatise on Invertebrate Paleontology, Part L., Mollusca 4, Cephalopoda, Ammonoidea. The Geological Society of America and The University of Kansas Press. 490 pp.
accessory p. 3
acute p. 3
adapertural p. 3
adapical p. 3
adoral p. 3
adventitious lobe p. 3
adventive lobe p. 3
ammonitic p. 3
anaptychus p. 3
aperture p. 3
appoximated p. 3
approximated p. 3
aptychus p. 3
auxiliary p. 3
bicarinate p. 3
biconcave p. 3
biconvex p. 3
bifurcate p. 3
biplicate p. 3
bisulcate p. 3
body chamber p. 3
bulla p. 3
bundled p. 3
cadicone p. 3
caecum (pl. -ca) p. 3
camera p. 3
capricorn p. 3
carina (pl. -ae) p. 3
ceratitic p. 3
chamber  p. 3
chevron p. 3
clavus p. 3
collared p. 3
compressed p. 3
concave p. 3
conch p. 3
connecting ring p. 3
constricted  p. 3
constriction  p. 3
contracted p. 3
convergent p. 3
convex p. 3
coronate p. 3
costa (pl. -ae) p. 3
cruciform p. 3
cuneiform p. 3
cyrtocone p. 3
dense p. 3
dependent p. 3
depressed p. 3
distant p. 3
divergent p. 3
dorsal lobe p. 4
dorsolateral area p. 4
dorsum p. 4
ellipticone p. 4
endogastric p. 4
evolute p. 4
excentric p. 4
excentrumbilicate p. 4
exogastric  p. 4
external lobe p. 4
external saddle p. 4
external suture p. 4
falcate p. 4
falcoid p. 4
fasciculate p. 4
fastigate p. 4
fillet p. 4
flank p. 4
flare p. 4
flared peristome p. 4
flared rib p. 4
floored p. 4
foliole p. 4
goniatitic p. 4
growth lines p. 4
gyrocone p. 4
helicoid p. 4
heteromorph p. 4
hyponomic sinus p. 4
impresed area p. 4
intercalatory p. 4
intercosta p. 4
internal lobe p. 4
internal suture p. 4
interspace p. 4
involute p. 4
keel p. 4
labial ridge p. 4
laira p. 5
lanceolate p. 4
lappet p. 4
last septum p. 4
last septum p. 4
lateral lobes p. 4
lateral saddles p. 4
lateral sinus p. 4
lateral sulcus p. 4
lipped p. 5
lobe p. 5
lobule p. 5
longitudinal looped p. 5
median saddle p. 5
mouth p. 5
node p. 5
occluded p. 5
ornament p. 5
oxyhcone p. 5
parabola p. 5
parabolic p. 5
peristome p. 5
phragmocone p. 5
phylloid p. 5
pila p. 5
planulate p. 5
platycone p. 5
plicate p. 5
primary rib p. 5
primary p. 5
prochoanitic p. 5
projected p. 5
prorsiradiate p. 5
prosepta p. 5
prosiphon p. 5
prosiphonate p. 5
prosuture p. 5
protoconch p. 5
pseudoceratitic p. 5
radial p. 5
rectiradiate p. 5
retracted p. 5
retrochoanitic p. 5
retrosiphonate p. 5
rib p. 5
rostrum (pl. -ra) p. 5
runcinate p. 5
rursiradiate p. 5
saddle p. 5
secondary rib p. 5
septal foramen p. 5
septal funnel p. 5
septal lobe p. 5
septal neck p. 5
septate p. 5
septicarinate p. 5
septum  (pl. -ta)  p. 5
serpenticone p. 5
serrated p. 5
shell p. 5
shoulder p. 5
sigmoid  p. 6
simple p. 6
sinus  p. 6
sipho p. 6
siphon p. 6
siphuncle p. 6
spatulate p. 6
sphaeroconestria p. 6
strigate p. 6
sulcate p. 6
sulcus (pl. sulci)  p. 6
suspensive lobe p. 6
sutural elements p. 6
suture  p. 6
tabulate p. 6
tarphycone p. 6
test p. 6
torticone p. 6
transverse p. 6
tricarinate p. 6
trifurcate p. 6
triplicate p. 6
tubercle p. 6
umbilical angle p. 6
umbilical area p. 6
umbilical border p. 6
umbilical callus p. 6
umbilical edge p. 6
umbilical lobe p. 6
umbilical perforation p. 6
umbilical seam p. 6
umbilical shoulder p. 6
umbilical suture p. 6
umbilical width p. 6
umbilicus p. 6
unipolar p. 6
venter  p. 6
ventral area p. 6
ventral lappet p. 6
ventral lobe p. 6
ventral saddle p. 6
ventrolateral angle p. 6
ventrolateral edge p. 6
virgatotome p. 6
volution  p. 6
whorl p. 6
whorl flank p. 6
whorl height p. 6
whorl thickness p. 6
whorl width p. 6
whorl section p. 6
whorl side p. 6