DavidRoyHunter.pdf
DavidRoyHunter.pdf DavidRoyHunter.pdf
falOdlfortn6: l1gonodinUur1llS ~nd prlontdinl for..... TheloKogn.th1for....r .. a.y_trlc.lconodon t .....1thalongand ,.lend@rr@dln..dcusp tll&t 1,. shsTp-edged and laterally carlnat@, Th@ (>Osterlor proeus 1.9 long, highly arched and dlet..lly flexed Inward. [t is sunaounudby laterally corapressed. bually fu"'Old and sharp-edged dentlcle8 thin Increase In al1;e ..nd In lncHnatlon towards a great denclcle at the arch cres!. Sequ..nt tothll1 the dentlcles are nearlyperpendlculsr to the proc@uandofdecreaslng"t1;e. Th.. aharp anterior @dgeof the cuspext"ndadovnandln....rd ..... shnrtbl..d....ith about slxpeg-!ike dentides that are direeted up...ard into the plane of 'the cusp. The anterior and poato.rlor procf!"""" fono an inner angle of about 13) d@lIr"ea. An outer-Iatenl cusp carina continues do..n and J>0sterlorly as a short process..,lth lin angle of about 40 degrees to theposterlorprocl!ss. This PTOCe$S is broken In all spec1o>en" but is df!nttcutated "lmllar to rhe anterior process. Ashcathbetlleen theOuter-la[eral and poster!or processes enclose" a generally triangular basal ca...ity that beco....s In..... rted poster10rly. ~.Th.. r"1!I31nlng .. l .."",nuoftheapparatu5ar"'id",ntlca]to corresponding ele.....nts in the P. aculeatus morphotype "t apparatus Kalerlal. 2871oxognathtfor""". ?Family PI::KIOIJON1:l0AELindstrOIll. " 1970 Genus SPINODllS Dd.... 1976 Type Sped"'. CordylodUllsplnatus Kaddlng, 19l) ~.OdI
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.
- Page 123: allterlor ll'.arll.ins and deep [r[
- Page 126 and 127: - •• ]...."'H ,wilr th~ "nf~rl,
- Page 128 and 129: -110- ./ t~{;~l.t..· Wall1serodus
- Page 130 and 131: I ,. ~s a~YL'"""trieal m"ltiCo~tale
- Page 132 and 133: ....~y""""'trical blcostate drepana
- Page 134 and 135: symm... try transition compf!slng f
- Page 136 and 137: "itionlo~'!i!.,butappearstohav"d~sc
- Page 138 and 139: - allledorlyon al least OlLe of the
- Page 140 and 141: I The latter [OTlIlis similar to [o
- Page 142 and 143: a.e c~~uct"rh:"d by asyll\ll>Ctrlca
- Page 144 and 145: Genus EOPLACOGNAfHUS HOIII
- Page 146 and 147: 1. . procen develops from the cusp
- Page 148 and 149: to fO TIIl the dent;c"l.oted proces
- Page 150 and 151: pcri.~,eter 0' the anrerlr proce99
- Page 152 and 153: ----- 1"-.-~- . ,-.,:ir4~~~.... ,.
- Page 154 and 155: ut sh"llowly ncavated. The roof of
- Page 156 and 157: paralleillith thelnncr-DIIrglnaLrld
- Page 158 and 159: -------- a 81Ibg"n"s of Pdoniodu!I.
- Page 160 and 161: -142- ~ b·J ~ ~~~~ ffi? Q ~& jJ)]
- Page 162 and 163: ~.48speci_ns. Genus BALroNIOOUS LIn
- Page 164 and 165: -146- setatanangleof60to!lOdegrees.
- Page 166 and 167: B,t,LTONIOOOS VARIAllILIS (!!ergstr
- Page 168 and 169: llgonodlnifom-prlonlodlnlfo... serl
- Page 170 and 171: -152 / b~. ~~ ~ Figure 41. A-E,G,
- Page 172 and 173: ·10n&,th....nt... rior ...&In of
- Page 176 and 177: ] lINDSTIlOM 19nb. p. 109. p1. 22,
- Page 178 and 179: - -160- of[h"-baSe,andfo~lhlsrea90n
- Page 180 and 181: ~. HAMAR 1964, ~. 2b3, 1'1. I, OK"
- Page 182 and 183: ore ouu,ard. 'I ) M.¥tedal. 18pec1
- Page 184 and 185: Bassler, R.S., ln~. Classlfication
- Page 186 and 187: Bryant, W.L., 1921. The Genesee con
- Page 188 and 189: -170:' . H....r, C., 1964. The Kldd
- Page 190 and 191: Lane, F.W., 1960. KingdOOl of the O
- Page 192 and 193: Morrill, S.C., .976. A ne" Cambrian
- Page 194 and 195: " SChlllldt, 11.,1933. Cephlllopode
- Page 196 and 197: T>I"nhofel, IoI,H:: 1947. nw Siluri
- Page 198 and 199: Wolska, t .• 1961. ~onodontY 1. O
- Page 200 and 201: All sped,.."" X4~. SalOp Ie nu..ber
- Page 202 and 203: I All sped;"en" X:iO. Sample numlj,
- Page 204 and 205: .. All 8p~
- Page 206 and 207: ~._'- "'" specimens x52. Sample num
- Page 208 and 209: PLATE 4
- Page 210 and 211: PLATE 5
- Page 212 and 213: 13
- Page 214 and 215: p,!ven in pa~enthes,-s. ) 2. 1'"He~
- Page 216 and 217: PLATE 7
- Page 218 and 219: PLATE 8
- Page 220 and 221: PLATE 9
- Page 222 and 223: PLATE lO
falOdlfortn6: l1gonodinUur1llS ~nd prlontdinl for.....<br />
TheloKogn.th1for....r .. a.y_trlc.lconodon t .....1thalongand<br />
,.lend@rr@dln..dcusp tll&t 1,. shsTp-edged and laterally carlnat@, Th@<br />
(>Osterlor proeus 1.9 long, highly arched and dlet..lly flexed Inward. [t<br />
is sunaounudby laterally corapressed. bually fu"'Old and sharp-edged dentlcle8<br />
thin Increase In al1;e ..nd In lncHnatlon towards a great denclcle<br />
at the arch cres!. Sequ..nt tothll1 the dentlcles are nearlyperpendlculsr<br />
to the proc@uandofdecreaslng"t1;e. Th.. aharp anterior @dgeof the<br />
cuspext"ndadovnandln....rd ..... shnrtbl..d....ith about slxpeg-!ike<br />
dentides that are direeted up...ard into the plane of 'the cusp. The anterior<br />
and poato.rlor procf!"""" fono an inner angle of about 13) d@lIr"ea. An<br />
outer-Iatenl cusp carina continues do..n and J>0sterlorly as a short process..,lth<br />
lin angle of about 40 degrees to theposterlorprocl!ss. This<br />
PTOCe$S is broken In all spec1o>en" but is df!nttcutated "lmllar to rhe<br />
anterior process. Ashcathbetlleen theOuter-la[eral and poster!or processes<br />
enclose" a generally triangular basal ca...ity that beco....s In..... rted<br />
poster10rly.<br />
~.Th..<br />
r"1!I31nlng .. l .."",nuoftheapparatu5ar"'id",ntlca]to<br />
corresponding ele.....nts in the P. aculeatus morphotype "t apparatus<br />
Kalerlal.<br />
2871oxognathtfor""".<br />
?Family PI::KIOIJON1:l0AELindstrOIll. "<br />
1970<br />
Genus SPINODllS Dd.... 1976<br />
Type Sped"'. CordylodUllsplnatus Kaddlng, 19l)<br />
~.OdI
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