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Table 1 Transcriptome statistics for the nine viviparous shark species sampled here

From: Evidence of positive selection associated with placental loss in tiger sharks

Species

Family

Order

Placental/Non-placental

Number of filtered reads

Number of transcripts

N50

Atlantic sharpnose shark (Rhizoprionodon terraenovae)

Carcharhinidae

Carcharhiniformes

Placental

60,513,987

88,870

1844

Blacknose shark (Carcharhinus acronotus)

Carcharhinidae

Carcharhiniformes

Placental

57,835,152

131,575

2201

Blue shark (Prionace glauca)

Carcharhinidae

Carcharhiniformes

Placental

65,764,260

96,764

1137

Bull shark (Carcharhinus leucas)

Carcharhinidae

Carcharhiniformes

Placental

60,513,987

91,122

1719

Caribbean reef shark (Carcharhinus perezii)

Carcharhinidae

Carcharhiniformes

Placental

62,012,857

118,363

2340

Dusky smoothhound (Mustelus canis insularis).

Triakidae

Carcharhiniformes

Placental

52,695,471

98,463

2026

Lemon shark (Negaprion brevirostris)

Carcharhinidae

Carcharhiniformes

Placental

62,258,228

70,506

1701

Sand tiger shark (Carcharias taurus)

Odontaspididae

Lamniformes

Non-placental

71,760,543

118,363

1687

Tiger shark (Galeocerdo cuvier)

Carcharhinidae

Carcharhiniformes

Non-placental

59,087,862

179,867

1858