Gemmellaro*´s ammonite – scratch one off the “Wanted” list !

Gemmellaroceras rutilans (SIMPSON, 1843), diameter 40 mm

Gemmellaroceras rutilans (SIMPSON, 1843), diameter 40 mm

 

In May this year, Byron messaged me a picture of an ammonite which had been found
by Ricky at Ravenscar (presumably the side towards Robin Hoods Bay, i.e. Wine Haven),
asking me for an identification.

The small ammonite has a diameter of exactly 40 mm and is preserved as a somewhat
pyritic internal mould on a small block of shelly matrix.

Significantly, this matrix also contains pieces of Pinna bivalves which is usually indicative
of the jamesoni zone, taylori subzone, of the lower lias – so no guessing necessary for
identifying the stratigraphy, which can be a big bonus when identifying ex-situ ammonites
from the Yorkshire coast.

At that point I was prepping another small specimen from this zone with an Apoderoceras
so I figured it had to be the same thing and identified it as such…

A few days later Byron put this ammonite up for sale and (you know me) I could not resist….
The ammonite was picked up from Byron´s shop in Whitby this summer and went home
with me. Usually, ready-for-drawer ammonites like this one queue up on my desk for final
identification and a label.

A few months later, until this weekend in fact, it was still sitting on my desk for
identification…It had turned out that identification was not as easy as I had hoped,
it was not an Apoderoceras, no nodes on the thin ribs, and from the small remaining
bits of shell it looks like the ribs would barely be visible under the shell…

The ammonite at 40 mm diameter is a mostly complete adult, as the crowding of the sutures
suggests, and has about half a whorl of body chamber preserved.

Trifid lateral lobe of the suture (marked L) and crowding of sutures towards the aperature, indicating an adult specimen

Trifid lateral lobe of the suture (marked L) and crowding of sutures towards the aperature, indicating an adult specimen

I had identified a possible match with Epideroceras sociale, especially with the style of
ribbing on the inner whorls, but since Epideroceras is getting much larger and develops
much thicker whorls when adult, this match fell through…

Having about half an hour to kill before lunch would be ready this Sunday,  I was
browsing Howarth´s 1962 “The Yorkshire Type Ammonites and Nautiloids of YOUNG
and BIRD, PHILLIPS, and Martin SIMPSON”, looking for something entirely different
and stumbled across the pictures of Polymorphites rutilans (SIMPSON, 1843)
(now Gemmellaroceras rutilans) on table 15 – a perfect match with the crenelated keel
of my ammonite.

The ribs crossing the venter created a crenelated keel

The ribs crossing the venter created a crenelated venter

I had not had Gemmellaroceras on my list assuming they would only be much smaller
(like Gemmellaroceras tubellum), but reading HOWARTH´s
“The Lower Lias of Robin Hood´s Bay, Yorkshire, and the work of Leslie Bairstow” again,
found that this is indeed the larger species and can be found,
(how blind can one sometimes be…)  explicitly mentioned, in Bairstow bed 530,
associated with Pinna folium…

There is another subgenus which is apparently similar, just stratigraphically slightly
older – Leptonotoceras – in which the lateral lobe of the suture is only split twice
(bifid) instead of three times (trifid) as in Gemmellaroceras – the lateral lobe is trifid
in this ammonite so we´re also clear about this.

So that´s about enough to round up this identification, and it´s also a species that can be
scratched off my “Wanted” list – done !

Scratched off the "Wanted..." list !

Scratched off the “Wanted…” list !

Now let´s see if I have the smaller species of this genus, G. tubellum, hiding in my collection
somewhere…

AndyS

* Gaetano Giorgio Gemmellaro (1832-1904) was an italian paleaontologist and geologist,
founder of the Palermo Geological museum and researcher, among many other topics,
on sicilian pygme elephants. Alpheus Hyatt named the genus after him in 1900, presumably
to reciprocate for an honour which  Gemmellaro had bestowed upon him in 1887 by naming
a permian ammonite genus (Hyattoceras) after him…

A new Amaltheus species for the collection

Amaltheus gloriosus HYATT, 38 mm diameter

Amaltheus gloriosus HYATT, 38 mm diameter

I found a species new to my collection today – in the drawer !
After almost 25 years collecting on the Yorkshire coast, finding a species that I do not have yet in my collection does not happen very often.
I was labeling some finds that I had prepped recently and was sorting them into the appropriate drawer, when I looked again at an ammonite that
I had found at Hawsker in the summer last year. I remember the circumstances of that find very well, there was a piece of dark shale that had fallen from somewhere higher in the cliff, and the piece looked like it came from the upper lias. There was a small greyish nodule embedded in that piece of shale and something that looked like a separate, non-nodularized whorl of a flat ammonite beside it. The nodule looked like it was rebedded, it had what looks like cracks on the outside that had been filled again with shale material. I got curious and split the nodule – and was surpized to find a small Amaltheus inside. The separate piece of ammonite whorl looked very worn and I could not really identify what it was.

Back at home I prepped the little ammonite, put a label of “Amaltheus subnodosus” on it and forgot all about it.

So when I saw it again this morning, I took it out of the drawer and decided to take a second look…it looked different.
Counting the ribs I found it had 12 ribs at around 20 mm, and 17 ribs at around 35 mm, compared to an A. subnodosus with 16 ribs at 20 mm and 21 ribs at 34 mm.

On the inner whorls the tubercles are very strong and almost elongated, the tubercles almost are the ribs, on an A. subnodosus they are a lot less strong.

Direct comparison between Amaltheus gloriosus (left) and similarliy sized Amaltheus subnodosus (right)

Direct comparison between Amaltheus gloriosus (left) and similarliy sized Amaltheus subnodosus (right)

My conclusion is that this ammonite is an Amaltheus gloriosus HYATT, 1867.

Rib density matches well with what HOWARTH documented for another Hawsker specimen, as does the given description and a figure mentioned from QUENSTEDT´s
“Der Jura” (table 20, fig. 9-12). A very good match was also found in A.E. Richter´s Book “Südfrankreich und seine Fossilien”, page 69 fig 49.

And that´s one more ammonite off the “wants list”- the Yorkshire coast never ceases to surprise me !

AndyS

Literature

M.K. HOWARTH 1957, The Ammonites of the Family Amaltheidae in Britain, Palaeontographical Society

F.A. QUENSTEDT 1858, Der Jura, Reprint Goldschneck Verlag 1987
A.E. RICHTER, Südfrankreich und seine Fossilien, Kosmos Frankh 1979

Yorkshire (and adjacent areas) Asteroceratinae in all shapes & forms

Asteroceras obtusum, 9 cm, Charmouth / Dorset

Asteroceras obtusum, 9 cm, Charmouth / Dorset

(Starting this post with a Dorset Asteroceras – bit cheeky, I know, but it´s going to be the only Dorset specimen in this post, I promise !)

Asteroceratinae is a subfamily of ammonites more usually associated with the Dorset coast, the beautiful, sometimes large, ammonites in all shades of calcite from deep brown to light yellow come to mind. In Yorkshire species like Asteroceras or Eparietites  are less common in such nice a preservation, and I have not seen the beautiful brown & honey colors –  greys & blacks are more prevailing in Yorkshire coast specimen;  body chambers without inner whorls can be seen quite often on the scars, complete specimen can usually only be found in concretions, which are usually soft enough to prep the ammonites completely with shell – carefully done, it reveals shell details that you rarely see from anywhere else.

The green shelled Asteroceratinae from the old, long closed Conersby quarry in Scunthorpe, Lincolnshire are of course a visual highlight; when the shell is removed, predominantly white chambers fillings with additional greens/yellows/pinks & browns and dark chamber walls produce a striking contrast, that is highly sought after (and paid for) these days…
From what I´ve seen, theses so called “Scunnies” belong to species that are basically the same as on the Yorkshire coast.

 Opportunities to find Asteroceratinae ammonites in Robin Hoods Bay have become relatively rare;  more often than not, the beds containing these ammonites are covered by sand or rocks in Robin Hoods Bay.  Larger specimen are particularly rare, but they are there – the picture below was shot on day in March 2012 where a window down to the beds below a boulder field had opened – I was counting 6 large Asteroceras in an area of about 20 x 20 m – all of them were eroded like the one pictured. Two days later, that window had closed. Also remember – this is an SSSI exposure, please collect responsibly !

Asteroceras sp. in situ, approx. 20 cm

Asteroceras sp. in situ, approx. 20 cm

HOWARTH lists the following species of the Asteroceratinae subfamily in the Bairstow collection from Robin Hoods Bay:

Asteroceras obtusum         23 ribs / whorl

Asteroceras confusum       30-34 ribs / whorl
Asteroceras stellare          32-40 ribs / whorl
Asteroceras blakei            26-28 ribs / whorl
Aegastoceras crassum        22-26 ribs / whorl
Aegasteroceras sagittarium  22-26 ribs / whorl

Caenisites turneri             42 ribs / whorl
Caenisites brooki              40 ribs / whorl
Eparietites impedens        shallow ribs, keel very prominent, no real keel furrows
Eparietites bairstowi         large specimen with almost no ribbing
Epophioceras landrioti      almost like an Echioceras
As a rule of thumb, the genera can be distinguished in the following manner :Asteroceras – more or less thick whorls with keel
Aegasteroceras – more or less thick whorls without keel
Caenisites – thinner whorls with keel, fine deep ribbing, deep keel furrows, more evolute than Eparietites, umbilical width between 40 and 50 %
Eparietites – thinner whorls with very prominent keel, fine shallow ribbing, more involute than Caenisites, umbilical width between 22 and 35 %
Epophioceras – looks more like a Gagaticeras or an Echioceras, only in this subfamily due to similar suture.

(Numbers  given for ribs/whorl and umbilical width are from SCHLEGELMILCH and GUÉRIN-FRANIATTE, for references see below)

Of course, some of these species can also be found on the Cleveland coast and in the glacial drift at the Holderness coast.

Asteroceras obtusum (SOWERBY, 1817)

Asteroceras obtusum seems to be relatively rare, I have only a few specimen in my collection. It´s whorls are thicker than the ones

from A. blakei and it has the least ribs/whorl of the species.

Asteroceras blakei SPATH, 1925

Asteroceras blakei seems to be the most common species at Robin Hoods Bay, at least in my collection…

I´ve shown you Keeley & Adrian specimen of this species before (link), here is another one :
Asteroceras blakei, 6.5 cm, Robin Hoods Bay

Asteroceras blakei, 6.5 cm, Robin Hoods Bay

Aegasteroceras cf. crassum SPATH, 1925

This is a thicker species of Aegasteroceras which has even less of a keel compared to Aegastoceras saggittarium.
Keel shot here only, the specimen needs a bit of re-prep. It was on my “wants list” before, I “found” it in my drawers while
working on this post…
Aegasteroceras cf. crassum, 7.5 cm, keel view

Aegasteroceras cf. crassum, 7.5 cm, keel view

Aegasteroceras sagittarium (BLAKE, 1876)

I have many Aegasteroceras saggittarium in my collection, but none of the are very well preserved.
Here is a keel shot only to show the almost non-existent keel. There are some more that need re-prepping…
Aegasteroceras sagittarium, 5.5 cm, Robin Hoods Bay, keel view

Aegasteroceras sagittarium, 5.5 cm, Robin Hoods Bay, keel view

Caenisites tuneri (SOWERBY, 1824)

Caenisites turneri seems to be very rare from Robin Hoods Bay, this is the only specimen I have found so far, and it is badly crushed in the inner whorls.
Caenisites turneri, 5 cm, mostly crushed, Robin Hoods Bay

Caenisites turneri, 5 cm, mostly crushed, Robin Hoods Bay

Caenisites brooki (SOWERBY, 1818)

Caenisites brooki is also quite rare and sits in the middle between Eparietites impedens and Caenisites turneri : It´s middle keel rises above the
side keels and it has deeper ribbing than Eparietites. It has deep keel furrows, it´s umbilical width is somewhat variable, I guess there are many intermediates
between the genera.
Direkt comparison between Eparietites impedens (left) and Caenisites brooki (right), both 3.5 cm, Robin Hoods Bay

Direkt comparison between Eparietites impedens (left) and Caenisites brooki (right), both 3.5 cm, Robin Hoods Bay

Caenisites brooki, 10 cm, Scunthorpe

Caenisites brooki, 10 cm, Scunthorpe

Caenisites cf. brooki, 3 specimen 4-5 cm, Robin Hoods Bay, purchased from B. Blessed

Caenisites cf. brooki, 3 specimen 4-5 cm, Robin Hoods Bay, purchased from B. Blessed

The 3 ammonites in this specimen seem to be intermediates beween C. brooki and C. turneri –
thicker whorls than C. brooki, a bit more evolute, but the keel rises above the side keels.

Eparietites impedens (YOUNG & BIRD, 1828)

The Eparietites shown here is a find from July 2013. It is a beautiful specimen, that is comprised of most of the shelled inner whorls of a larger specimen
shown in the previous post – sadly the outer whorl was mostly eroded. It´s most diagnostic feature is the strong keel that has no real side furrows.
I´m particularly fond of this specimen since it has most of it´s shell preserved, and it has such a nice fine structure…
Eparietites impedens, 8 cm, Robin Hoods Bay

Eparietites impedens, 8 cm, Robin Hoods Bay

Species I think I do not currently have in my collection from Yorkshire include :

Eparietites bairstowi HOWARTH 2002 (some doubtful large specimen, mud filled chambers with no inner whorls)
Epophioceras landriotti (D´ORBIGNY, 1849)
Asteroceras confusum SPATH, 1925
Asteroceras stellare (SOWERBY, 1815)

AndyS

Literature :

S. GUÉRIN-FRANIATTE : Ammonites du Lias Inférieur de France, Centre National de la Recherche Scientifique, Paris 1966
R. SCHLEGELMILCH : Die Ammoniten des süddeutschen Lias, Gustav Fischer Verlag, 2. Edition 1992
M.K. HOWARTH : The Lower Lias of Robin Hood´s Bay, Yorkshire, and the work of Leslie Bairstow, Bulletin of The Natural History Museum Geology Series Vol. 58/2, London 2002

New finds and acquisitions, June 2013

As you might have gathered, I´ve been collecting on the Yorkshire coast again at the end of March, and there are a few finds worth mentioning, that I have prepared now.

Also there are a few new acquisitions, either through generous gifts / trades from friends or purchases from fossil shops or eBay.
Furthermore, I´ve had the chance to photograph a few more ammonites from friend´s collections (you won’t see those now, though, they’re for the book)
But first things first –

New finds

Aegoceras (Beaniceras) luridum (SIMPSON, 1855)

In a recent blog post (link) I was moaning about not having found a Beaniceras yet – I had been intensely “bed walking” the relevant beds in summer last year and had only found a flattened specimen as proof that I was on the right bed and had almost given up hope to ever find one
– but when I picked up this inner whorl of a Lytoceras  this March on the beach and turned the rock around I knew I finally found one !
This small 1 cm beauty is a Beaniceras luridum, the index fossil of the luridum subzone, that got preserved in the same nodule as the Lytoceras. It is not exactly a large example, but better than nothing…

Pleuroceras anaptychus

This one looked up from a puddle at Shaun and I while we were collecting around Hawsker.
I had shown an aptychus (lower jaw) of a Peronoceras before (link), this now is an anaptychus (upper jaw) of a Pleuroceras. They’re exceedingly rare – first one I’ve found. As it happens, there has just been an article in the May issue of the german “Fossilien” magazine by Prof. Keupp describing an even more complete upper and lower jaw set of a Pleuroceras – apparently, judging from the form of the jaws, Pleuroceras was more of a krill (i.e. tiny shrimp) muncher, it did not have much of a bite…

Gifts/trades

Coroniceras deffneri (OPPEL, 1862)

I had found small (1-3 cm) specimen of this ammonite in the glacial drift at Robin Hoods Bay before, but the problem with identifying such small
Coroniceras ammonites is that usually only very large specimen are pictured in literature and inner whorls are rarely pictured / preserved – so I had not had a lot of confidence in my identification.
As part of a trade, Shaun Tymon gave me this larger (6.5 cm) specimen off the Holderness coast, which can now be confidently identified as Coroniceras deffneri – and it makes the list of specimen for the book one entry longer, since it had not originally been on there ! Thanks again, Shaun !

New purchases

Uptonia lata (QUENSTEDT, 1845)

Uptonia lata, 9 cm, Saltburn

Uptonia lata, 9 cm, Saltburn

This Uptonia lata came from Byron Blessed’s shop and had apparently been part of a larger Saltburn collection, that seems to have been sold to a couple of different dealers as lots – I think I have several different items from this collection, all have come with a characteristic small neat typewritten label.
Well preserved Ammonites from these beds are notoriously difficult to come by – you usually only find well weathered fragments…
With this one, the lower lias “wants” list is now one entry shorter and has been updated accordingly.

Harpoceras soloniacense (LISSAJOUS, 1906)

Harpoceras cf. soloniacense, 6.5 cm, Port Mulgrave

Harpoceras cf. soloniacense, 6.5 cm, Port Mulgrave

I regularly check eBay for interesting finds and this one caught my eye since it was labeled as a species that I had not come across from the Yorkshire coast : Harpoceras soloniacense.
Now misidentifications are not uncommon on eBay, but I took the chance…
Howarth’s Harpoceratidae monograph does not list it as occurring on the Yorkshire coast, but there is really no reason why it should not occur in Yorkshire – Zugodactylites braunianus was also
discovered relatively late in Yorkshire.
I’m pretty sure it really is a H. soloniacense : So the list of ammonites for the book just got another entry longer…
 AndyS

“Wants list” upper lias

The upper lias is  for many collectors a firm favourite.  There is a bit of a problem with some of the ammonites on the “wants list”, especially the Dactylioceras genus : Many of those have been described by the great Sydney Savoury Buckman, in his “Yorkshire Type Ammonites” – but not many times afterwards.  So some of these may not be “real” species…

What do you do if you think you have one of the ammonites on the list ?

Simple : Post a comment in the specific post (you have to leave your e-mail address but noone else but me can see it) and I will contact you !

So here´s the upper lias list : Some of these are real rarities, some may not even occur in Yorkshire, but please surprise me !

AndyS

Brodieia pingue (Simpson)
Catacoeloceras dumortieri (Maubeuge)
Catacoeloceras foveatum (Simpson)
Collina mucronata (d’Orbigny)
Dactylioceras annuliferum (SIMPSON, 1855)
Dactylioceras attenuatum  (SIMPSON, 1855)
Dactylioceras consimile (Buckman)
Dactylioceras crassescens (Simpson)
Dactylioceras delectum (Simpson 1855)
Dactylioceras praepositum (Buckman)
Dactylioceras temperatum (Buckman)
Dactylioceras vermis (Simpson)
Dumortieria levesquei (D`ORBIGNY, 1845)
Harpoceras serpentinum (SCHLOTHEIM, 1813)
Harpoceras subplanatum (OPPEL, 1856)
Haugia beani (Simpson)
Haugia jugosa (Quenstedt)
Haugia obliquata (Young and Bird)
Hildaites forte (BUCKMAN, 1921)
Hildaites murleyi (MOXON, 1841)
Hildaites subserpentinus BUCKMAN, 1921
Hildoceras semipolitum BUCKMAN, 1902
Meneghiniceras lariense
Nodicoeloceras dayi (Reynes)
Nodicoeloceras fonticulus (Simpson 1855)
Nodicoeloceras incrassatum (Simpson)
Pachylytoceras crenatum (Buckman)
Pachylytoceras gubernator (Simpson)
Phylseogrammoceras dispansum (LYCETT, 1860)
Phymatoceras fabale (Simpson)
Phymatoceras rude (SIMPSON, 1843) – found on eBay, see post “Rare and re-bedded” !
Porpoceras vorticellum (Simpson)
Protogrammoceras (Protogrammoceras) paltum (BUCKMAN, 1922)
Trachylytoceras (syn. Lytoceras) fasciatum (Simpson)

“Wants list” middle lias

The “Wants list” of the middle lias is relatively short (that may have to do something with the fact that I´m collecting in these beds quite often) :

Amaltheus (Amaltheus) reticularis (SIMPSON, 1843)
Amaltheus (Pseudoamaltheus) engelhardti (D`ORBIGNY, 1844)
Canavaria cultraroni (Fucini 1931)
Pleuroceras birdi (SIMPSON, 1843)
Pleuroceras hawskerense (YOUNG & BIRD, 1828) transient elaboratum (SIMPSON,1884)
Pleuroceras spinatum (BRUGUIÈRE, 1789)
Protogrammoceras (Protogrammoceras) turgidulum (Funcini 1904)
Pseudogrammoceras latecens (Simpson)

Some of these are real rarities, some may not even occur in Yorkshire, but please surprise me !

What do you do if you think you have one of the ammonites on the list ?

Simple : Post a comment in the specific post (you have to leave your e-mail address but noone else but me can see it) and I will contact you !

AndyS

 

 

“Wants list” lower lias

The next three posts will be quite dull – no pictures, just lists of ammonites I´m looking for to photograph for the book.

Let me re-iterate the conditions :

  • Found on the Yorkshire coast  – or –
  • Found on the Redcar & Cleveland coast (Redcar, Marske,…)  – or –
  • Found in the quarries around Scunthorpe

The first post is the lower lias one.

Bear with me if the list is not completely perfect – I´m still sorting through it to weed out the ones that are synonyms, have only ever been found or pictured once, etc.
If you have any information to that effect, please also let me know !

What do you do if you think you have one of the ammonites on the list ?

Simple : Post a comment in the specific post (you have to leave your e-mail address but noone else but me can see it) and I will contact you !

So here comes  :

Aegasteroceras crassum SPATH, 1925
Agassiceras decipiens (Spath, 1923)
Angulaticeras densilobatum (POMPECKJ)
Apodoceras sinuatum (Simpson)
Bifericeras donovani DOMMERGUES & MEISTER, 1992
Caloceras belcheri (SIMPSON, 1843)
Caloceras convolutum (SIMPSON,  1855)
Caloceras wrighti SPATH, 1924
Coeloderoceras panula (Bremer)
Coeloderoceras sociale (Simpson)
Coroniceras (Arietites) alcinoe (REYNÈS, 1879)
Coroniceras (Arietites) cf. planaries (REYNÈS, 1879)
Coroniceras (Arietites) obesulus (BLAKE, 1876)
Coroniceras (Arietites) radiatus (SIMPSON, 1843)
Coroniceras (Primarietites) schloenbachi (Reynes)
Coroniceras (Primarietites) vercingetorix (Reynes)
Crucilobiceras obsoletum (BLAKE)
Cymbites laevigatus (SOWERBY, 1827)
Echioceras aureolum (Simpson 1855)
Echioceras cereum (Simpson 1855)
Echioceras exoratum (Simpson 1855)
Echioceras intermedium (Trueman & Williams, 1925)
Echioceras raricostoides (VADASZ, 1908)
Eoderoceras anguiforme (Simpson)
Eoderoceras armatum (SOWERBY, 1815)
Eoderoceras hastatum (YOUNG & BIRD, 1828)
Eparietites bairstowi HOWARTH 2002
Epophioceras landrioti (D`ORBIGNY, 1849)
Gemmellaroceras peregrinum (Haug)
Gemmellaroceras rutilans (SIMPSON, 1843)
Gemmellaroceras tubellum (SIMPSON, 1855)
Gleviceras doris (Reynès, 1879)
Hyperderoceras mamilllatum (Simpson)
Hyperderoceras nativum (Simpson)
Hyperderoceras retusum (SIMPSON, 1855)
Hyperderoceras validum (SIMPSON 1855)
Liparoceras (L.) naptonense SPATH, 1938
Macrogammites antiquatum (SIMPSON, 1855)
Microderoceras scoresbyi (SIMPSON,1843)
Paltechioceras regustatum BUCKMAN, 1914
Paracymbites dennyi (SIMPSON, 1843)
Paraoxynoticeras salisburgense (HAUER, 1856)
Parinodiceras parinodum (Quenstedt, 1884)
Phricodoceras nodosum (QUENSTEDT, 1846)
Platypleuroceras aureum (SIMPSON, 1855)
Platypleuroceras brevispina (SOWERBY, 1827)
Platypleuroceras obsoleta (SIMPSON, 1843)
Platypleuroceras ripleyi (Simpson 1843)
Polymorphites bronni (ROEMER, 1836)
Polymorphites caprarius (QUENSTEDT, 1856)
Promicroceras capricornoides (Quenstedt, 1883)
Psiloceras sampsoni (PORTLOCK, 1843)
Psilocras (Caloceras) bloomfieldense (Donovan)
Radstockiceras sphenonotum(MONKE, 1888)
Saxoceras aequale (SIMPSON, 1855)
Tragophylloceras ibex (QUENSTEDT, 1843)
Tragophylloceras loscombi (SOWERBY, 1817)
Tropidoceras futtereri (Spath 1923)
Tropidoceras masseanum ((d’Orbigny) var. rotundum ((Futterer, 1893)
Uptonia jamesoni (SOWERBY, 1827)
Uptonia lata (QUENSTEDT, 1845)
Uptonia obsoleta (Simpson 1843)
Vermiceras multanfractum (SIMPSON, 1855)

AndyS