DavidRoyHunter.pdf

·10n&,th....nt... rior ...&In of ••""'11_ fur.ow. tn. b•••l c."ity ".rln In
\
.h.....nd .h.p.. d.pa""I"1 on the d..""lol*t!nt of tb.. out..r-l.. t .....l co.u.
but g.n"r..ll,. 1....11. It h ..eakly trl..n.uhr In outl1n'" and inve.ud
posurlorly.
Th...
UgonndlnHoru and th" prioniodlnUonY h.ve .obust cusps
that are In",ard d",rhct",d, coapns,..,d and latually ca.tnate,. The sharp
...dgu of th'" cu.p contlnue_nteriorly ..nd
I'oatuiorly as ",,,,II dev... loped
proce~.es th.. t ar" ,aur.ounted by l_teral1y co"pressed. sh.. rp and basally
fused d...ntlcl"a. DinaHy th~ posterior proeuse,...re t",lsted ..uell that
the dbt.. l dentic.le....e dir...cted oucward.
The prlonJodlniforu< are _rc,,",d .nd blade-like and have nnrly
"qually d,,"eloped ....tetior and posterior proen..e ..
that enclos" "n inner
angh of &0 to 70 dftre",a. TlIe posterior proce.. haa flv.. or .i" d"ntlc!e.
and the ant"rlor proc:ea. b ....
four or flve denticle•. The ba••1 ..rgln.
flare conv".I,. o"tvard benoeath the cuap ..nd "a aapa.ated beneath thlt
post... rlor p.oce•• by ana.r_and 6hall_ f"uO". The ba.al cavity contln,,",s
only ••hort diatance along the cuneate aboral edlle of the an:erlurproces"
..hereuponltbeco-slnverted.
The oral .dle, of tbe long po.terior proce•• of the Hgonodlnl·
for..... h.s about I2dentlcln ..ith a poacerlorly directed inclination of
about 60 d..gr.......
n.e senerally broken anterior prot...... ar.. d"fletud
posteriorly and dovn to an outer-lat..ul position that encloses an an~le
of ~bou{ 90 r1egreu wah tne posterior edge of the cusp. The basal cavity
Is sently convex outward, atrong)y f1 .. r"4..1"",ard and ia Inverted po~ter·
•
10rly,
The f.lodHo..... have In,,,arddeflatted. laterally cartnate and