Figure 3 in Phylogeny and evolution of corambid nudibranchs (Mollusca: Gastropoda)

Figure 3. Origin and phylogeny of corambids. Strict consensus tree of ten equally parsimonious trees obtained by cladistic analysis (PAUP) of data matrix given in Table 2. All charaters were treated as unweighted and unordered. The tree was unrooted. Numbers above branches refer to bootstrap values (BT <50 not indicated); values over 75 are set in bold face and are considered as significant (Felsenstein, 1985), obtained by a separate analysis (1000 replications, PAUP) with the same settings. Warm-water species are set in bold face. The split between the Eastern Pacific Corambe steinbergae and the terminal clade of Atlantic warm-water species occurred before or at the closing of the Isthmus of Panama, and thus dates back at least ~3 My. Abbreviations indicate geographic distributions: A, Atlantic; BA, Boreo- Arctic; MA, Magellanic; NA, Northern Atlantic; NEA, North-Eastern Atlantic, NEP, North-Eastern Pacific; NP, Northern Pacific; NWA, North-Western Atlantic; NWP, North-Western Pacific; SEP, South-Eastern Pacific; SWA, South-Western Atlantic, SWP, South-Western Pacific.