Skip to main content

Table 4 Morphological measurements of Gyrodactylus tomahuac n. sp. from Goodea atripinnis Jordan collected in Mexico

From: To each his own: no evidence of gyrodactylid parasite host switches from invasive poeciliid fishes to Goodea atripinnis Jordan (Cyprinodontiformes: Goodeidae), the most dominant endemic freshwater goodeid fish in the Mexican Highlands

Measurement G. tomahuac n. sp.
Río Pánuco basin, type-locality (n = 9)
G. tomahuac n. sp.
Río Lerma basin (n = 6)
  Range Mean Range Mean
Hamulus
 Total length 42.2–46.4 44.9 44.5–48.3 46.4
 Shaft length 24.9–26.4 25.6 26.3–28.9 27.3
 Point length 22.3–24.5 23.5 24.9–27.1 26.2
 Root length 17.8–21.5 19.3 18.8–22.5 20.0
 Proximal shaft width 6.6–8.5 7.8 8.3–8.8 8.5
 Aperture angle (o) 25.5–36.1 30.0 28.0–31.1 29.8
 Aperture distance 10.9–15.0 12.6 12.9–14.3 13.3
 Distal shaft width 4.0–5.1 4.4 4.3–5.1 4.7
Ventral bar
 Total length 15.6–21.0 18.5 16.6–20.9 19.2
 Total width 18.4–21.9 20.5 21.5–23.0 22.2
 Process-to-mid length 2.0–3.5 2.8 2.2–4.0 2.9
 Median length 4.7–5.9 5.4 5.4–6.1 5.8
 Process length 1.6–2.5 2.0 0.9–3.3 1.8
 Membrane length 9.2–14.4 10.7 10.0–12.2 11.0
Dorsal bar
 Total length 18.7–21.6 20.2 17.9–22.0 20.1
 Width 1.8–2.3 2.0 1.6–2.4 2.0
Marginal hook
 Total length 29.5–31.7 31.0 29.6–31.1 30.3
 Shaft length 24.0–26.7 25.9 25.1–27.0 25.9
 Sickle length 5.2–5.8 5.5 4.8–6.1 5.4
 Sickle proximal width 3.7–4.4 4.0 3.5–4.3 3.9
 Toe length 1.2–1.8 1.6 1.6–1.9 1.7
 Sickle distal width 2.0–2.7 2.3 2.0–2.8 2.4
 Aperture 4.5–5.3 4.9 4.6–5.2 4.9
 Instep/arch height 0.4–0.8 0.6 0.4–1.0 0.7