From 3ab71a160337226f1ade49b833682649f71668f4 Mon Sep 17 00:00:00 2001 From: ggserver Date: Thu, 15 Aug 2024 17:56:03 +0000 Subject: [PATCH] Add updates up until 2024-08-15 17:50:59 --- .../87/245C87D88760FFEE3D1FD291FAC22D69.xml | 168 ++++++++++++++++++ .../87/245C87D88760FFEF3E55D531FE522AAD.xml | 155 ++++++++++++++++ 2 files changed, 323 insertions(+) create mode 100644 data/24/5C/87/245C87D88760FFEE3D1FD291FAC22D69.xml create mode 100644 data/24/5C/87/245C87D88760FFEF3E55D531FE522AAD.xml diff --git a/data/24/5C/87/245C87D88760FFEE3D1FD291FAC22D69.xml b/data/24/5C/87/245C87D88760FFEE3D1FD291FAC22D69.xml new file mode 100644 index 00000000000..ead8f7a6392 --- /dev/null +++ b/data/24/5C/87/245C87D88760FFEE3D1FD291FAC22D69.xml @@ -0,0 +1,168 @@ + + + +Campanian (Late Cretaceous) nautiloids from Sakhalin, Far East Russia + + + +Author + +Wilmsen, Markus + + + +Author + +Yazykova, Elena A. + +text + + +Acta Palaeontologica Polonica + + +2003 + +2003-09-30 + + +48 + + +3 + + +481 +490 + + + +journal article +1732-2421 + + + + + + +Cymatoceras +cf. +bifidum +Shimansky, 1975 + + + + + + +Fig. 6B +. + + +cf. + +Cymatoceras bifidum +Shimansky, 1975: 108 + +, pl. 23: 1. + + +Material +.— + +A single deformed specimen with shell preserved (no. PIW + +2002IV−4 + +from locality 0.6 in the +Naiba River valley +, +Sakhalin +) + +. + + +Description +. —Involute nautiloid with broadly rounded venter. The umbilical shoulder is rounded, grading into a steeply inclined to overhanging umbilical wall. The funnel−likeumbilicusisnarrowbutnotoccluded( +Fig.6B + +3 + +).Due to lateral compaction, only maximum diameter (~ +157 mm +), whorl height (~ +90 mm +) and umbilical diameter (~ +20 mm +) could be measured (Wh/D = 0.57; U/D = 0.13). Maximum breadth of whorl seems to be in the lower part of the flanks. The flank is covered by band−like ribs which broaden up to mid−flank, reaching a width of up to +12 mm +. Intercalated groovesare2–4mmwide.Bifurcationsorintercalatoriesappear on the outer flanks and on the ventrolateral shoulders ratherirregularly.Ontheventer,theribsareregularlyspaced and approximately +5–7 mm +wide ( +Fig. 6B + +2 + +). On the inner to middle part of the flanks the ribs are slightly prorsiradiate, thencurvebackwardsandcrosstheventerwithamoderately rounded sinus ( +Fig. 6B + +2 + +). Neither suture nor the position of the siphuncle are visible. + + +Remarks +.—This specimen is very close to + +Cymatoceras bifidum + +, especially in the style of ornament (broad ribs on flank, irregular bifurcations), but also the general shell form and the funnel−like, deep umbilicus (U/D = 0.15 in the +holotype +) are similar. That species was erected by +Shimansky (1975) +on the basis of a single specimen from the “Santonian” of Naiba, +Sakhalin +. According to the locality details (see below) and refined stratigraphy of that area, this find has now to be regarded as Lower Campanian. The holotypefiguredbyShimansky(1975)inpl.23:1a,seemsto have suffered a non−fatal shell injury, partly causing the irregular ribbing pattern on the flank. Due to the poor preservation, only some of the specific characters are unequivocally discernible (general ribbing pattern, umbilicus), and, therefore, our specimen is referred to + +C. bifidum + +only with reservation. + +Cymatoceras pacificum +Matsumoto and Muramoto, 1983 + +(92, pl. 18: 1, pl. 19: 1, pl. 20: 1, 2, text−fig. 3) from the lower Upper Campanian of +Hokkaido +, is a similar species concerning shell parameters. However, its style of ribbing is more regular and the ribs are finer. Furthermore, the whorl section is slightly more depressed in this species and the umbilicus is very narrow to occluded. + +Cymatoceras kayeanus +( +Blanford, 1861 +) + +, a common species in the Lower CampanianofMadagascar( +Kabamba1983 +),issimilarinrespect to the form of the ventral sinus. It, however, has more densely spaced, finer ribs, and is slightly more evolute and clearly compressed. + + +Occurrence +.—OurspecimenisfromtheKrasnoyarkaFormation,Member1,locality0.6intheNaibaRivervalley( + +Pachydiscus + +( +P +.) aff. +egertoni +Zone, lower Upper Campanian; see Figs.2,3).Theholotypeof + +C. bifidum + +comesfromtheLower CampanianofSakhalin,NaibaRiver,neartheRiverSeimestuary (left tributary of Naiba) ( +Shimansky 1975 +). + + + + \ No newline at end of file diff --git a/data/24/5C/87/245C87D88760FFEF3E55D531FE522AAD.xml b/data/24/5C/87/245C87D88760FFEF3E55D531FE522AAD.xml new file mode 100644 index 00000000000..6596220d651 --- /dev/null +++ b/data/24/5C/87/245C87D88760FFEF3E55D531FE522AAD.xml @@ -0,0 +1,155 @@ + + + +Campanian (Late Cretaceous) nautiloids from Sakhalin, Far East Russia + + + +Author + +Wilmsen, Markus + + + +Author + +Yazykova, Elena A. + +text + + +Acta Palaeontologica Polonica + + +2003 + +2003-09-30 + + +48 + + +3 + + +481 +490 + + + +journal article +1732-2421 + + + + + + +Cymatoceras +cf. +honmai +Matsumoto and Miyauchi, 1983 + + + + + + +Fig. 7 +. + + +cf. + +Cymatoceras honmai +Matsumoto and Miyauchi, 1983: 225 + +, pl. 48: + +2; pl. 49: 1, 2. + +Material +.— + +A single, wholly septate, strongly weathered internal mould (specimen PIW + +2002IV−5 + +) from locality +35 in +the +Manuj River valley +, +Sakhalin + +. + + +Description +.—Involute, depressed nautiloid with broadly rounded,nearlyflatventer.Dimensionsandproportionsareas follows: D = ~ +52 mm +; Wb = 39.6 mm; Wh = 33.3 mm; U = ~ +5 mm +; Wb/D = 0.76; Wh/D = 0.64; Wb/Wh = 1.19; D/U=~0.10.Thewhorlsectionisbroadlyellipticalwithmaximum breadth in the lower part of the flanks. The flanks are onlyweaklyconvexandgentlyconvergetowardsthebroadly rounded ventrolateral shoulders. The umbilicus is deep and narrowwithsteepumbilicalwalls;theumbilicalshouldersare rounded. The siphuncle is positioned subcentrally, slightly nearer to the venter than to the dorsum. The prorsiradiate sutureisoflowsinuosityandcharacterizedbyaninconspicuous saddle at the umbilical shoulder, a broad, shallow lateral lobe and a shallow lobe on the broad venter, separated by a saddle at the ventrolateral shoulder. The septa are fairly densely spaced (ca. 11–12 septa per half whorl). + + +Remarks +.—Withrespect tooutlineofwhorl section, proportions of shell, density of septa per whorl, position of siphuncle and degree of involution, our specimen is very close to + +Cymatoceras honmai + +. However, due to its incomplete preservation and slightdifferences in sutural sinuosity, it is assigned to + +C. honmai + +with a query. + + + +Fig. 7. +A +. + +Cymatoceras +cf. +honmai +Matsumotoand Miyauchi, 1983 + +(specimenPIW2002IV−5 fromtheLower CampanianBykov Formation,Member10, locality35attheManujRiversection,Sakhalin)inlateral(A +1 +),ventral(A +2 +),andseptal(A +3 +)views. +B +.Reconstructionofwhorlsection. +C +.Sutureline(not to scale) (all figures natural size except C). + + + +Occurrence +.—Lower Campanian ( + +Anapachydiscus + +( +N +.) +naumanni +Zone) of +Sakhalin +, Member 10 of the Bykov Formation,locality35(seeFigs.2,3).Thetypesof + +Cymatoceras honmai + +are from the lower Upper Campanian near Soya, northern +Hokkaido +(member “E” of Campanian strata of +Matsumoto and Miyauchi 1983 +). + + + + \ No newline at end of file