Table 2 Estimated mean and standard deviation (SD) TCSP, penetration depth and WSA of the FPP, Tigre, Tuina, Triangulars, Ayampitín and Pay Paso projectile points.

From: Changes in projectile design and size of prey reveal the central role of Fishtail points in megafauna hunting in South America

Projectile point TYPE

Mean TCSP (cm)

SD TCSP (cm)

Mean penetration depth (cm)

SD penetration depth (cm)

Mean WSA (cm2)

SD WSA (cm2)

Tuina

4.4

0.5

20.22

0.62

88.97

10

PayPaso

4.6

0.5

19.97

0.67

91.88

10.7

FPP patagonia

5.2

0.82

19.22

1

99.96

15.9

Triangulars patagonia

5.4

1.7

18.97

2

102.45

31.5

FPP pampa

6.1

2.1

18.09

2.6

110.40

38.6

FPP andes

5.6

1.3

18.72

1.7

104.85

25.2

Tigre

6.1

1.7

18.09

2.1

110.40

31.4

Ayampitin

4.9

1

19.59

1.3

96.03

20

  1. The Penetration depth was calculated from the lineal formulae of TCSP versus penetration depth, based on the experimental results of Sitton et al.39. WSA was calculated as the product of TCSP by the estimated Penetration depth36.
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