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Megokkos
Taxonomy
Megokkos was named by Schweitzer and Feldmann (2000). Its type is Portunites alaskensis.
It was assigned to Portunidae by Schweitzer et al. (2003) and Karasawa and Schweitzer (2006); to Macropipidae by Karasawa et al. (2008) and Schweitzer et al. (2010); and to Polybiinae by Schweitzer and Feldmann (2000), Schweitzer et al. (2006) and Schweitzer et al. (2021).
It was assigned to Portunidae by Schweitzer et al. (2003) and Karasawa and Schweitzer (2006); to Macropipidae by Karasawa et al. (2008) and Schweitzer et al. (2010); and to Polybiinae by Schweitzer and Feldmann (2000), Schweitzer et al. (2006) and Schweitzer et al. (2021).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2000 | Megokkos Schweitzer and Feldmann p. 640 figs. Fig. 5 |
| 2003 | Megokkos Schweitzer et al. p. 46 |
| 2006 | Megokkos Karasawa and Schweitzer p. 61 |
| 2006 | Megokkos Schweitzer et al. p. 128 |
| 2008 | Megokkos Karasawa et al. p. 100 |
| 2010 | Megokkos Schweitzer et al. p. 107 |
| 2021 | Megokkos Schweitzer et al. p. 9 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Megokkos Schweitzer and Feldmann 2000
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†Megokkos alaskensis Rathbun 1926
†Megokkos feldmanni Nyborg et al. 2003
†Megokkos hexagonalis Nagao 1932
†Megokkos macrospinus Schweitzer et al. 2000
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. E. Schweitzer and R. M. Feldmann 2000 | Carapace wider than long, hexagonal, L/W about 65 percent; regions moderately defined by shallow grooves. Front straight with four blunt protuberences. Orbits very wide, deeply excavated, sometimes with small orbital tooth and notch, two orbital fissures, one of which is continuous with notch if present; fronto-orbital width/width ratio about 67–74 percent. Anterolateral margin short, bearing four or five spines including outer-orbital spine, last spine usually longest. Protogastric and hepatic regions with transverse ridges. Epibranchial region arcuate, extending axially from last anterolateral spine. Branchial regions weakly inflated. Posterolateral reentrant wide, well-developed. Chelae heterochelous, stout, fingers with large blunt denticles on occlusal surface. Dactyl of fifth pereipod paddle-like. |