Species: borissiaki TROFIMNOV, 1978
Etymology:

Holotype: PIN 3103/09

Locality: Höövör (Khovboor), Guchin Us Somon, Aryaykher aymak, Gobi Desert, Mongolia.

Horizon: Höövör (Khovboor) Beds.

Biostratigraphy:

Age: ?Aptian or Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: Partial right mandible with 5 molariform teeth, the most mesial antemolariform tooth, and alveoli for 5 additional antemolariform teeth.

Referred material:

PIN 3101/10-3101/17: 8 fragmentary lower jaws.

PIN 3101/18, 3101/19: 2 partial maxillae.

 

KIELAN-JAWOROWSKA & DEMBERLYIN DASHZEVEG, 1998

Locality: Khoboor Beds, Höövör (Khovboor), Guchin Us Somon, Aryaykher aymak, Gobi Desert, Mongolia.

Horizon: Höövör (Khovboor) Beds.

Biostratigraphy:

Age: ?Aptian or Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material:

Paleontological and Stratigraphic Section, Institute of Geology, Mongolian Academy of Sciences, Ulan Bator, PSS 10-15b: Damaged fragment of left maxilla with M2-M5.

PSS 10-15a: Partial left dentary with p2-m2, alveoli for p1 and broken alveoli for the canine and an incisor.

PSS 10-15: Crown of left m1.

 

MASCHENKO & LOPATIN, 1998

Locality: Right bluff of the Kiya River, a right tributary on the Chulym River, 1.5 km downstream from Shestakovo, 55?54’12”N latitude and 87?57’28”E longitude, Chebula District, Kemerovo Province, Western Siberia, Asian Russia.

Horizon: Ilek Formation.

Biostratigraphy:

Age: Aptian-Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material:

PIN N 4463/1: Fragmentary left mandible with a partial incisor, a complete canine, alveoli for premolars, a fragmentary m1, a nearly complete m2 and roots of m3.

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Species: hoburensis (TROFIMNOV, 1978) KIELAN-JAWOROWSKA & DASHZEVEG, 1998
Etymology:
= Guchinodon hoburensis TROFIMNOV, 1978

Holotype: PIN 3101/24

Locality: Höövör (Khovboor), Guchin Us Somon, Aryaykher aymak, Gobi Desert, Mongolia.

Horizon: Höövör (Khovboor) Beds.

Biostratigraphy:

Age: ?Aptian or Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: Fragmentary lower jaw with teeth.

Referred material:

LOPATIN & AVERIANOV, 2014

PIN 3101/21: Right maxilla fragment with M1-3 and alveoli for C, and P1-2.

PIN 3101/22: Right maxilla fragment with M1-3 and alveoli for P2, M 5 and for cyrptic M 5.

PIN 3101/23: Left maxilla fragment with M1-4 and alveoli for P2 and for cryptic M5.

PIN 3101/25: Right dentry fragment with m1r-4r, m5, alveoli for i203, c, p1, and partial coronoid process.

PIN 3101/26: Left dentary fragmetn with dp2, m1-3, alveoli for i1-3, c, p1, m4, cryptic m5, and partial coronoid process.

PIN 3101/27: Right dentary fragment with m2-4 and alveolus for cryptic m5, and aprtial coronid process.

PIN 3101/28: Right dentary fragment with m2-4 and aprtial coronoid porcess.

PIN 3101/29: Right dentary fragment with m4r, m5, and alveolus for m3.

PIN 3101/30: Left dentary fragment with m1 and alveoli for i1-3, c, and p1-2.

PIN 3101/31: Right dentry fragmetn with m304 and erupting m5.

PIN 3101/33: Left dentary fragmtn with 13, c, dp1, m1 and alveoli for i1-2, dp2, and m2.

PIN 3101/34: Right dentary fragment with m304 and alveolius for cryptic m5.

PIN 3101/35: Right dentry fragment with p1-2, m1r-4r and alveoli for m5.

PIN 3101/36: Left dentary fragment with m304 and alveolous for cryptic m5.

PIN 3101/37: Left dentry fragment with 12 and alveoli for i1, i3, c, p1-2, m1.

PIN 3101/38: Right dentary fragment with m1 and alveoli for i1-3, c, and p1-2.

PIN 3101/39: Left maxilla fragment with alveoli for M1-4 and cryptic M5.

PIN 3101/40: Right maxilla fragment with M2R-4R and M5.

PIN 3101/415: Right M3(?).

PIN 3101/416: Left M1.

PIN 3101/417: Right dentary fragment with m3r-4r and m5.

PIN 3101/418: Right lower molariforms.

KIELAN-JAWOROWSKA & DEMBERLYIN DASHZEVEG, 1998

Paleontological and Stratigraphic Section, Institute of Geology, Mongolian Academy of Sciences, Ulan Bator, PSS 10-37a: Fragment of right maxilla with M1, alveoli for P3, P4, M2, M3.

PSS 10-37b: Fragment of left maxilla with M3-M5.

PSS 10-37c: Partial right dentary with m1-m5, distal margins of alveoli for canine and p1, complete alveoli for p2-p4.

PSS 10-21: Crown of isolated right m5.

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Species: ostromi JENKINS & SCHAFF, 1988
Etymology: In honor of John Ostrom.

Holotype: MCZ 19965

Locality: NW 1/4, Sec. 34, T4S, R28E, Big Horn County, Southcentral Montana.

Horizon: Himes Mudstone Member, Cloverly Formation.

Biostratigraphy:

Age: Cashenranchian, Aptian-Albian Stage, middle Gallic subepoch, lower Cretaceous Epoch, Early Cretaceous.

Material: A partial skeleton including both mandibles and partial or complete postcranial bones.

Note: Has an Os Calcaris (HURUM, LUO & KIELAN-JAWOROWSKA, 2006).

Referred material:

Locality: NW 1/4, Sec. 29, T7S, R24E, Carbon County, Montana.

Horizon: Himes Mudstone Member, Cloverly Formation.

Biostratigraphy:

Age: Cashenranchian, Aptian-Albian Stage, middle Gallic subepoch, lower Cretaceous Epoch, Early Cretaceous.

Material:

MCZ 19860: A partial skeleton including both mandibles, maxillary and other cranial fragments, parts of the vertebral column and ribs, shoulder and pelvic girdles and limb bones.

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Species: hopsoni ROUGIER, NOVACEK, McKENNA & WIBLE, 2001
Etymology: In honor of Dr. James A Hopson, one of a slected few who can comfortably straddle the blurry non-mammalian cynodont/mammalian boundary, with impressive contributions to both segments of therapsid history.

Holotype: PSS-MAE 140

Locality: Oshih, Oshih Basin, Northern Gobi, Mongolia.

Horizon: Cannonball Member, Oshih Formaton.

Biostratigraphy:

Age: Valanginian Stage, Middle Neocomian Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous.

Material: Partial right maxilla preserving the last molariforms and fragments of the 2 preceding molariforms.

Referred material:

PSS-MAE 139: A fragmet of right lower jaw with a broken, unerupted molariform and alveoli for 2 more anterior teeth.

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Species: palaios SIGOGNEAU-RUSSELL, 2003
Etymology: Greek, palaios, "old": with respect to the other species of the genus.

Holotype: SA 107

Locality: Anoual Syncline, Talsinnt Province, Morocco.

Horizon: Sequence B of the Red Beds.

Biostratigraphy:

Age: Berriasian Stage? lower Neocomian Subepoch, Lowest Early Cretaceous Epoch, Earliest Early Cretaceous.

Material: A right upper molar (M1?).

Referred material:

SA 80: A worn right upper malariform.

SA 93: A partial left ?upper premolar (posterior part).

SA 111: A right ?upper molar (M2?).

SA 119: A right upper molar (M1?) .

SA 129: A partial right ?upper premolar (poserior part).

SA 130: A left upper molar (M2?)).

SA 138: A right upper molar.

SA 141: A left  upper molar.

SA 146: Anterior third of a left upper molar.

SA 153: Anterior two-thirds of a left upper molar.

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Species: zofiae LI, WANG, HU, & MENG, 2003
Etymology: In honor of Zofia Kielan-Jaworowska (1925-2015), world renowned Polish researcher

Holotype:

Locality: Lujiatun site, Shangyuan, Beipiao City, Western Liaoning Province, northeastern China.

Horizon: Horizon 1, Lower part of the Yixian Formation, Jehol Group.

Biostratigraphy: Psittacosaurus Fauna, Confuciusornis Avifauna.

Age: Valanginian Stage, Upper Neocomian Subepoch, Early Early Cretaceous Epoch, Early Cretaceous.

Material: Skull and dentary.

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Species: tomidai KUSUHASHI, WANG, LI, & JIN, 2015 (published 2016)
Etymology: In honor of Dr. Yukimitsu Tomida, who is one of the leading Japanese vertebrate paleontologists working intensely on Asian small mammals and who is a good friend of the authors.

Holotype: IVPP V14510

Locality: Badaohao, Heishan, Liaoning Province, China.

Horizon: Shahai Formation.

Biostratigraphy:

Age: Aptian or Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: A partial right lower jaw with i1-12, broken caine, alveoli for p1-p2 and m1, and variably preserved m2-m5.

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Species: haizhouensis KUSUHASHI, WANG, LI, & JIN, 2015 (published 2016)
Etymology: 'Haizhou' is an ancient name for Fuxin, the type loclaity of the species.

Holotype: IVPPV14509

Locality: Fuxin, Liaoning Province, China.

Horizon: Fuxin Formation.

Biostratigraphy:

Age: Aptian or Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: An almost complete right dentary wiht 12-i2, an alveolus for a canine, p1-p3 and m1-m5.

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Species: bathoniensis BUTLER, & SIGOGNEAU-RUSSELL, 2016
Etymology: Latin, Bathonium, in reference to the geological age (based on the outcrops at Bath, UK)

Holotype: M46527

Locality: Old Cement Works Quarry, (Washford Quarry), Kirtlington, Ordnance Survey Grid Reference SP 495200, Oxfordshire County, England, Southern United Kingdom.

Horizon: Kirtlington Mammal bed, near base of the Forest Marble.

Biostratigraphy: Oppelia aspidioides Zone.

Age: Upper Bathonian Stage, upper middle Dogger Epoch, Middle Jurassic.

Material: Upper right molar.

Referred material:

M46083, M46189: Upper left molars.

Locality: Swyre, Dorset County, England, Southern United Kingdom.

Horizon:

Biostratigraphy:

Age: Upper Bathonian Stage, upper middle Dogger Epoch, Middle Jurassic.

Material:

M46031: ?Last upper right molar.