The preserved right manus is composed of two lower carpal bones, complete three metacarpal bones and a complete second digit.
The first lower carpal measures 8.23 cm (82.3 mm) tall and 8.53 cm (85.3 mm) wide having two articulations on the lowermost end.
The upper surface of this carpal is divided by a broad fossa that forms the articulation of the carpus.
On its inner side it has a triangular-shaped outline and attaches to the upper surface of metacarpal I occupying a little bit less than the lateral side, which articulates to metacarpal II.
When they cross, these areas are separated by an oblique projection.
The second lower carpal is smaller than the first one, it measures 5.6 cm (56 mm) tall and 5.93 cm (59.3 mm) tall.
Its lower surface is flattened and the articular surface of the carpus extends from the first carpal to the second carpal over the articulation of the two bones.

The metacarpal I is 14.55 cm (145.5 mm) long and compared to the others is more robust and stocky.
Overall, the lateral side is broad, especially on the uppermost area; the inner border is thin and narrow.
The upper articulation is configured into three parts.
The lower articular top is somewhat asymmetric, and bends to the inner side from the left, along with a wide, deep opening.
The metacarpal II measures 28.68 cm (286.8 mm) in length and is the most elongated and robust.
It has an inclined, square and flattened upper articulation.
The articulation on the lower head has very symmetrical condyles, being divided by a broad, deep fossa.
The lateral connecting openings are poorly developed.
The metacarpal III covers 19.16 cm (191.6 mm) in length, it has a very thin shaft compared to the other metacarpals, and features a upper articulation that splits into three parts.
The lower articular head is asymmetrical with deep and broad openings.
As in metacarpal II, the lateral connecting openings are poorly developed.
Only the second digit of the right manus was preserved, consisting of two phalanges and a large ungual.
The first and second phalanges are somewhat equal in shape and length (14.17 cm (141.7 mm) and 14.38 cm (143.8 mm), respectively), they also share the robust and stocky structure.
The upper articular facets are very symmetrical and preserve a crest that is particularly taller in the first phalanx.
The top border of this crest is very pointed and thick; it likely served as the site for attachment of the extensor tendons in life.
The lower heads are nearly symmetrical, but the central fossa is considerably wider and deeper in the first phalanx.
The preserved unguals are specially enormous, estimated to be approximately 52 cm (520 mm) in length.
Unlike other therizinosaurs, they are very straight, laterally flattened and not particularly curved with very sharp point tips.
The upper articulation is symmetrical and has a cross-ridge that divides the surface into two asymmetrical parts.
The size of the unguals IGM 100/16 and 100/17 may indicate that they belong to manual digits I and III, respectively.
The preserved right manus is composed of two lower carpal bones, complete three metacarpal bones and a complete second digit. The first lower carpal measures 8.23 cm (82.3 mm) tall and 8.53 cm (85.3 mm) wide having two articulations on the lowermost end. The upper surface of this carpal is divided by a broad fossa that forms the articulation of the carpus. On its inner side it has a triangular-shaped outline and attaches to the upper surface of metacarpal I occupying a little bit less than the lateral side, which articulates to metacarpal II. When they cross, these areas are separated by an oblique projection. The second lower carpal is smaller than the first one, it measures 5.6 cm (56 mm) tall and 5.93 cm (59.3 mm) tall. Its lower surface is flattened and the articular surface of the carpus extends from the first carpal to the second carpal over the articulation of the two bones.
The metacarpal I is 14.55 cm (145.5 mm) long and compared to the others is more robust and stocky. Overall, the lateral side is broad, especially on the uppermost area; the inner border is thin and narrow. The upper articulation is configured into three parts. The lower articular top is somewhat asymmetric, and bends to the inner side from the left, along with a wide, deep opening. The metacarpal II measures 28.68 cm (286.8 mm) in length and is the most elongated and robust. It has an inclined, square and flattened upper articulation. The articulation on the lower head has very symmetrical condyles, being divided by a broad, deep fossa. The lateral connecting openings are poorly developed. The metacarpal III covers 19.16 cm (191.6 mm) in length, it has a very thin shaft compared to the other metacarpals, and features a upper articulation that splits into three parts. The lower articular head is asymmetrical with deep and broad openings. As in metacarpal II, the lateral connecting openings are poorly developed. Only the second digit of the right manus was preserved, consisting of two phalanges and a large ungual. The first and second phalanges are somewhat equal in shape and length (14.17 cm (141.7 mm) and 14.38 cm (143.8 mm), respectively), they also share the robust and stocky structure. The upper articular facets are very symmetrical and preserve a crest that is particularly taller in the first phalanx. The top border of this crest is very pointed and thick; it likely served as the site for attachment of the extensor tendons in life. The lower heads are nearly symmetrical, but the central fossa is considerably wider and deeper in the first phalanx. The preserved unguals are specially enormous, estimated to be approximately 52 cm (520 mm) in length. Unlike other therizinosaurs, they are very straight, laterally flattened and not particularly curved with very sharp point tips. The upper articulation is symmetrical and has a cross-ridge that divides the surface into two asymmetrical parts. The size of the unguals IGM 100/16 and 100/17 may indicate that they belong to manual digits I and III, respectively.
Therizinosaurus