DavidRoyHunter.pdf

having eLe_nts ...ith .t~ongly elong.te poste~ior proce...e...nd long den·
tide" circular In cro•• aactlon. Only th.. type .. p",~iea ..... brought into
S. spinatu.e)thibitllally.....etrytr.n.ltionfro.cordylodHorOls
through ligonodintfo",s' to tdchonodeUlforms. Dz~k (1976) "'sodue"
lhls klndofapparatu.....tthprillitlve prlonlodids and consequently nslgns
th"g"nu;Splnodu.. to~.The..,rphOlogyofth"el"menuof
Splnodus, hO'Jev,,~, sugg"st. a close.. affinity to the lo,",er Llanvirnlan
specie.. Cordylodus horrldua (Barne..."dPqpl...."kt, l(73), and the older
sp",cies eordylodus .ngulatu'" Ltke C. angulatu.. , S. spinalus has eh,mcnts
w1thslightdtfferent"-.. lntheba,,alpart.~andS ...plnatus
similarly aha" in"ard and outward splaying "f denticl"". Nonetheless·, the
appa~atus"sofC.angulatus.fld~cofltainOnlyt"odiff"r"nt
kinds of for';"; and are thus distinctly different froll the apparatus of
~~.ThhPoint"aS·brOUght4lutbYLind8trom(1970).DZlk(t976)
points out thestruclural similarities between Splnodusand th"hyaline
~,hU..ever,th"morphOlogical ..iml1.r1tiesofthefo",,,is
lacking.
The SY""-"try tranldtlon exhibited by Splnodus 15 IDOSt similar
toth"'flrBt[t.n~ltion8ertesof~andcOlls"quentlyth"t ...omay
possibiy be related. The observ8tlon~ of this study can do nO IDQre than
~uggestthatthet..obelonginthefallily~.
·SPINODOS SPINATO.S (Madding, 1913)
Pl. 12, flg8. h-3b; Fig. l,2A-C
HADDINC 1913, p. 32, pI. I, Hg. 8; 1p. 31, pI. t, ltg. 6.