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Table 2 Comparative table of morphological characters of Ampelisca troncosoi sp. nov. and closely related species

From: A new species of Ampelisca (Crustacea, Amphipoda) from NW Iberian Peninsula: Ampelisca troncosoi sp. nov.

  Head Corneal lenses Rostrum Antennae Pereopod 7 merus Pereopod 7 basis Epimeral plate 3 Urosome carina Uropod 3 Telson
A. troncosoi sp. nov. LA present 1 pair Distally rounded; between A1 pair A1 > PA2 Lobe absent PL normal PDA rounded Rounded, prominent Two rows of minute spines and long setae on outer ramus; long setae on inner ramus Few dorsal spine-like setae; several long setae on cleft margins; 2 plumose distal setae
A. uncinata Chevreux, (1887) LA absent 0–1 pair Absent A1 < PA2 Large posterior lobe PL normal PDA with tooth Angular Several long and short marginal setae and long terminal setae on rami Several dorsal long setae
A. brachyceras Walker, (1904) LA present 1 pair Distally acute; above A1 pair A1 = PA2 Lobe absent PL normal PDA with tooth Small Two rows of minute spines and long setae on outer ramus; long setae on inner ramus Several long setae on cleft margins
A. ctenopus Schellenberg, (1925) LA absent 1–2 pairs Absent A1 = PA2 Lobe absent PL normal PDA with tooth Small, quadrate Several long marginal setae on rami 8–12 long dorsal setae; 2 distal long setae
A. heterodactyla Schellenberg, (1925) LA present 0 Present A1 ≤ PA2 Lobe absent PL margin distally excavate PDA rounded Flat One row of minute spines and long setae on outer ramus; long setae on inner ramus 6 setae on cleft margins
A. heterodactyla sensu Reid, (1951) LA present 2 pairs Distally acute; above A1 pair A1 < PA2 Lobe absent PL normal PDA rounded Flat Terminal? long setae on rami Several long setae (on cleft margins?)
A. monoculata Dauvin and Bellan-Santini, (1985) LA absent 1 pair Absent A1 < PA2 Lobe absent PL normal PDA with tooth Small, quadrate Several marginal setae on rami 2 subterminal spines on cleft right lobe; 1 spine on left lobe
  1. LA lateral angle, P peduncle, PDA posterodistal angle, PL posterior lobe