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Table 1 Morphological comparison of Gambierdiscus excentricus records

From: Morphological and molecular phylogenetic identification and record verification of Gambierdiscus excentricus (Dinophyceae) from Madeira Island (NE Atlantic Ocean)

  Canary Islands1 Brazil2 Madeira3
Sampling site 28° 34.62′N 22° 45.3′S 32° 38.17′N
16°19.7′W 41°54.12′W 16° 56.11′W
Cell shape lenticular lenticular lenticular
Cell compression anterio-posteriorly anterio-posteriorly anterio-posteriorly
Cell size
 depth [μm] 84–115 60–95 95–105
 width [μm] 69–110 53–91 100–110
thecal ornamentation smooth with pores smooth with pores smooth with pores
plate formula Po 3′ 7′′ 6c ?s 5′′′ 2′′′′ Po 3′ 7′′ 6c 8s? 5′′′ 2′′′′ Po 3′ 7′′ ?c 4+s 5′′′ 2′′′′
APC
 location ventrally displaced ventrally displaced ventrally displaced
 apical pore fishhook-shaped slit fishhook-shaped slit fishhook-shaped slit
 marginal pores one row one row irregular
Plate 2′ ~ rectangular ~ rectangular ~ rectangular
Ratio 2′/3′ to 2′/1′ ~  2 2.2–2.6 ~  2
Plate 2′′′′ narrow narrow narrow to wide
  1. 1(Fraga et al., 2011), 2(Nascimento et al., 2015), 3present study