Dalli‐type

Japanese: dalli‐type
Dalli‐type

...The name given to individuals whose white spots on the sides of their bodies reach the pectoral fins, and is also called the Truei type (English name True's porpoise). In contrast, the type whose white spots end below the dorsal fin is called the Dall 's porpoise. In some cases, the two types are considered to be separate subspecies, but since there is no difference other than the body color, they are considered to be variations within the same species.

*Some of the terminology explanations that mention "dalli-type" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…体側の白斑が胸びれに達する個体の呼称で,リクゼンイルカ型truei‐type(英名True’s porpoise)ともいう。これに対して,白斑が背びれの下で終わっている型をイシイルカ型dalli‐typeと呼ぶ。両型を別亜種とした場合もあるが,体色以外には違いがないので,同種内の変異とされている。…

※「dalli‐type」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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