Genus: Zalambdalestes GREGORY & SIMPSON, 1926
Etymology: Zalambdondont, term for molar teeth with narrow v-shaped crowns. Greek, za, ”much, very”, Greek, Lambda, Greek letter “l” resembling upside down Latin letter “v”, Greek, lestes, “thief”: Zalambdont thief.

Species: lechei GREGORY & SIMPSON, 1926
Etymology:

Holotype: AMNH 21708

Locality: Bayan Zag (= Bayn Dzak, Shabarakh Usu GILMORE, 1943), Ömnögov (South Gobi), Mongolia.

Horizon: Djadochta Formation.

Biostratigraphy:

Age: Middle Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Nearly complete skull and dentary.

Referred material:

AMNH 21707: Fragmentary lower jaw with teeth.

AMNH 21704: Nearly complete skull and dentary.

KIELAN-JAWORWSKA 1969, 1984

ZPal MgM-I/4: Fragmentary right lower jaw of a juvenile, with alveoli of i1-c, broken off p1 and p2-m1.

ZPal MgM-I/13: Fragmentary skull with lower jaws.

ZPal MgM-I/14: Fragmentary skull.

ZPal MgM-I/15: Fragment of left lower jaw with badly damaged m1-m2.

ZPal MgM-I/16: Fragmentary skull.

ZPal MgM-I/30: Badly damaged rostral fragment of skull with worn out right and left P3-M1 and fragments of right and left lower jaws.

ZPal MgM-I/31: Partial left lower jaw with strongly damaged m2-m3.

ZPal MgM-I/32: Fragment of right lower jaw with damaged m1-m3.

ZPal MgM-I/43: Fragmentary skull, fragmentary lower jaw, incomplete left pelvis, left tibia lacking proximal part, incomplete left tarsus (calcaneus, astragalus, navicular and medial cuneiform), five metatarsals (proximal parts of second and third ones are broken off, the first metatarsal is obscured by the remaining ones and not developed from the rock due to the state of preservation), first phalanges of all digits (distal part of fourth and fifth broken off), displaced fragment of left ulna, situated along the left tibia, fragment of right pelvis with proximal part of femur preserved in acetabulum, incomplete right pes consisting of cuboideum, lateral cuneiform and five metatarsals (distal parts of fourth and fifth broken off), first and second phalanges of the first digit, incomplete first phalanges of second and third digits, complete first phalanges of fourth and fifth digits, and 2 caudal vertebrae.

ZPal MgM-I/51: Right lower jaw with incomplete angular process, broken i1 and i3, root of i1 and c-m3.

ZPal MgM-I/166: Second to seventh cervical vertebrae and first thoracic vertebra.

WIBEL, NOVACEK & ROUGIER, 2004

PSS-MAE 130: Skull.


DASHZEVEG, NOVACEK, NORELL, CLARK, CHIAPPE, DAVIDSON, McKENNA, DINGUS, WISHER & ALTANGEREL, 1995

Locality: Ukhaa Tolgod, near the salt extraction settlement of Daus, northeastern Nemegt Basin, Gurvan Tes Somon, Ömnögov (South Gobi), Mongolia.

Horizon: Djadokhta Formation or the Barun Goyot Formation.

Biostratigraphy:

Age: Middle-Late Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material:

Number: Not given:

 

KIELAN-JAWOROROWSKA, & TROFIMOV, 1981

Locality: Tögrög (Toogreek), Ömnögov (South Gobi), Mongolia.

Horizon: Toogreeg beds.

Biostratigraphy:

Age: Late Cretaceous.

Material:

PIN 3143-501: Nearly complete left lower jaw of an adult with roots of Li1, Li2, broke off Li3, Lc, roots of Lp1, Lp, Lp-Lm.

KIELAN-JAWORWSKA 1969, 1984

PIN 3143-501: Nearly complete left lower jaw with broken incisors, C, roots of P1-P2 and P3-M3.

 

WIBEL, NOVACEK & ROUGIER, 2004

Locality: Tögrögiin Shiree (= Tugrugeen Shireh, Tugrikin-Shireh locality), Ömnögov (South Gobi), Mongolia.

Horizon: Djadochta Formation.

Biostratigraphy:

Age: Middle Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material:

PSS-MAE 108: Skull with attached lower jaws and four cervical vertebrae.

PSS-MAE 135: Partial skull with attached partial lower jaws.


= Zalambdalestes grangeri SIMPSON, 1928
Etymology:

Holotype: AMNH 21709

Locality: Bayan Zag (= Bayn Dzak, Shabarakh Usu GILMORE, 1943), Ömnögov (South Gobi), Mongolia.

Horizon: Djadochta Formation.

Biostratigraphy:

Age: Middle Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Fragmentary skull with cheek teeth, fragment of lower jaw with partial pelvis and femur.

Referred material:

KIELAN-JAWOROWSKA, 1968

Locality: Bayan Zag (= Bayn Dzak, Shabarakh Usu GILMORE, 1943), Ömnögov (South Gobi), Mongolia.

Horizon: Djadochta Formation.

Biostratigraphy:

Age: Middle Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material:

ZPal MgM-I/14: Fragmentary skull with right and left mandibles in occlusion.

ZPal MGM-I/16: Nearly complete skull without lower jaws.