Re: [dinosaur] Hypselohaptodus, new sphenacodontian synapsid from Lower Permian of England

This was my editing goof... I copied "early sphenacodontian synapsid from
the Lower Permian of England" from the paper title into the subject line
and then edited it down, and accidentally deleted the "s" along with
"early." I immediately saw the flub after I clicked "send." I blame Windows
slippery text highlighting, which has messed up editing deletions and
copy-paste items before (chopping off parts of author long lists)--plus an
itchy click finger...

Of course, Huxley at one point was speculating about Silurian mammals...

"...some of us may yet hope to see the fossil remains of a Silurian mammal".
Huxley (1869)

https://urldefense.proofpoint.com/v2/url?u=https-3A__books.google.com_books-3Fid-3DNhM-2DAAAAcAAJ-26pg-3DPA89-26lpg-3DPA89-26dq-3D-2522some-2Bof-2Bus-2Bmay-2Byet-2Bhope-2Bto-2Bsee-2Bthe-2Bfossil-2Bremains-2Bof-2Ba-2BSilurian-2Bmammal-2522.-26source-3Dbl-26ots-3DBobz3x1Gvt-26sig-3DACfU3U24BZBApVoVevjjFwjWb8tL9wp29Q-26hl-3Den-26sa-3DX-26ved-3D2ahUKEwjtx5jH6YbkAhXnHzQIHcDFCsYQ6AEwAHoECAEQAQ-23v-3Donepage-26q-3Dpoikilitic-26f-3Dfalse&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=wyvax0-wk_0SgLfWVO3WJy9uSkZPPBBdxMgoQJ3dvyY&s=oW9DSOz_gUI4oloA1gZlo524vHYvRvESOh9hxUcWTFw&e= 

On Thu, Aug 15, 2019 at 11:04 PM Nick Pharris <[email protected]> wrote:

> That did throw me for a bit of a loop.
>
> “Phenacodontians” would be synapsids, too, of course—though a close
> relative of Phenacodus from the Lower Permian would be quite a find!
>
> —Nick P.
>
> Sent from my iPhone
>
> On Aug 15, 2019, at 8:32 AM, Ben Creisler <[email protected]> wrote:
>
> Ooops1
>
> Correction to subject line...
>
> On Thu, Aug 15, 2019 at 8:31 AM Ben Creisler <[email protected]> wrote:
>
>>
>> Ben Creisler
>> [email protected]
>>
>>
>> A new paper:
>>
>> Hypselohaptodus gen. nov.
>> Hypselohaptodus grandis (Paton, 1974)
>> Haptodus grandis Paton, 1974
>>
>>
>> Frederik Spindler (2019)
>> Re-evaluation of an early sphenacodontian synapsid from the Lower Permian
>> of England.
>> Earth and Environmental Science Transactions of The Royal Society of
>> Edinburgh (advance online publication)
>> DOI: https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1017_S175569101900015X&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=wyvax0-wk_0SgLfWVO3WJy9uSkZPPBBdxMgoQJ3dvyY&s=392apmT2ePW-0zXhLJXovkuQMM_YA7l87v0OPT7IdnY&e= 
>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1017_S175569101900015X&d=DwMFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=0YnH7osWPehiOegnLgWaC4ngaSayVYjrlmPZLDJLNPk&s=yErq23TDgQwBZ7EpewODxCg6W_PqRZ74NvzrJCC5NFQ&e=>
>>
>> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.cambridge.org_core_journals_earth-2Dand-2Denvironmental-2Dscience-2Dtransactions-2Dof-2Droyal-2Dsociety-2Dof-2Dedinburgh_article_reevaluation-2Dof-2Dan-2Dearly-2Dsphenacodontian-2Dsynapsid-2Dfrom-2Dthe-2Dlower-2Dpermian-2Dof-2Dengland_CEF6308931532407FCF5D6E956815C1C&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=wyvax0-wk_0SgLfWVO3WJy9uSkZPPBBdxMgoQJ3dvyY&s=52ompDJyHKs7JmXk7AMRyCsHaZAAqWaA-4gqqyc6KnM&e= 
>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.cambridge.org_core_journals_earth-2Dand-2Denvironmental-2Dscience-2Dtransactions-2Dof-2Droyal-2Dsociety-2Dof-2Dedinburgh_article_reevaluation-2Dof-2Dan-2Dearly-2Dsphenacodontian-2Dsynapsid-2Dfrom-2Dthe-2Dlower-2Dpermian-2Dof-2Dengland_CEF6308931532407FCF5D6E956815C1C&d=DwMFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=0YnH7osWPehiOegnLgWaC4ngaSayVYjrlmPZLDJLNPk&s=r8bbpZMNTuT-ICSaE4eB5QqpTNbfmjYMZUBZZJYSE10&e=>
>>
>>
>>
>> The holotypic isolated maxilla of the early sphenacodontian Haptodus
>> grandis from the Cisuralian of England is revisited. A unique character
>> combination includes haptodontine-grade traits like less specialised teeth
>> and a high number of precanines, but at the same time a shortened lacrimal
>> that is separated from the naris, which is strongly diagnostic of
>> Sphenacodontoidea. As the specimen cannot be assigned to any known taxon,
>> the new taxon Hypselohaptodus grandis gen. nov. is proposed. Comparison
>> with other sphenacodontians reveals a mosaic distribution of maxillary
>> features, most significantly regarding the precanine region. Preliminary
>> character histories preclude Hypselohaptodus from Sphenacodontidae, but
>> suggest a haptodontine-grade or basal therapsid position. The latter
>> hypothesis is substantiated by an ecological model of episodic wet phases
>> in an overall trend of aridification throughout the Permian, to explain the
>> rareness of non-sphenacodontid sphenacodontians in the fossil record. Also
>> from the early Permian of England, an isolated dentary has previously been
>> assigned to Ophiacodon, but can be shown to be either a sphenacodontian,
>> possibly affiliated with Hypselohaptodus, or a robust, Stereorhachis-like
>> ophiacodontid. The absence of Ophiacodon in the intramontaneous Permian
>> basis of Europe is explained by a narrow environmental tolerance range
>> requiring limnic connection with lowland basins.
>>
>>
>>
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