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Table 2 Summary of the expression levels of hepatocyte-sinusoidal structures and hematopoietic tissue structures in livers of Urodela and Gymnophiona species

From: Comparative histological study of hepatic architecture in the three orders amphibian livers

Order Order Species HSS Hematopoietic tissue structures
Family PZ | CZ PSR PTR IHLN
Urodela Cryptobranchoidea      
  Hynobiidae Hynobius nebulosus 2 | 1 + + +
   Hynobius dunni 2 | 1 + + +
   Hynobius naevius 2 | 1 + + +
   Hynobius okiensis 3 | 2 + + +
   Hynobius stejnegeri 3 | 2 + + +
   Hynobius kimurae 3 | 2 + + +
   Hynobius nigrescens 3 | 2 + + +
   Hynobius lichenatus 3 | 2 + + +
   Hynobius retardatus 3 | 3 + + +
   Onychodactylus japonicus 3 | 3 + + +
  Cryptobranchoidea      
  Cryptobranchidae Andrias japonicus 3 | 2 + + +
  Salamandroidea      
  Salamandridae Cynops ensicauda 3 | 2 + + +
   Cynops pyrrhogaster 3 | 2 + + +
Gymnophiona Typhlonectidae Typhlonectes sp. 3 | 3 + + +
  1. Hepatocyte-sinusoidal structure (HSS): (1) several-cell-thick plate type, (2) two-cell-thick plate type, (3): one-cell-thick plate type. Hematopoietic tissue structures: (−): do not exist, (+): exist. CZ – pericentral zone; IHLN – Inter-hepatic lobular nodule; PZ – periportal zone; PSR – Perihepatic subcapsular region; Portal triad region – PTR.