Subtype is a gameplay characteristic.
It is generally written in a smaller font under the
Card Name. Those without notation, are cards without a subtype.
creature has a subtype, it is known as a race. Besides creatures, spells and cross gear may also have a subtype.
For example, spells have Knight and cross gear have the Samurai subtype.
As a rule, a creature always has a race. However each of the other cardtypes such as
castle, weapon, fortress or cell have never had a subtype printed on them.
Previously when a subtype was listed under the card name of a spell or cross gear, it was also known as a race, but in the
Duel Masters General Game Rules released in July 2015, it was noted that it is only a race when listed on a creature, and is otherwise a subtype.
Nevertheless, the effect
text of Universe Lapia seems to ignore this, by giving the "Phoenix race" to each of your cards in your mana zone, deck, graveyard and in the battle zone. There are no cards that explicitly mention "subtype" in their text.
(August 9th, 2018) Duel Masters - General Game Rules: Version 1.9 203. Subtype
203.1. Subtypes are characteristics of cards which are usually printed just under the card name.
203.2. Cards have their subtypes written in subtypes.
203.2a Creatures have races written in subtypes.
203.2b Spells may have subtypes. Currently existing subtypes include "Knight", "Special Climax", "Jokers" and others.
203.2c Sometimes a cross gear has subtypes. The currently existing subtypes include "Samurai".
203.3. Some effects refer to subtypes or to the parts of them. In that case, they refer to everything that contains such subtypes.
Example: An effect which refers to "Dragon" refers to all cards that contain "Dragon" in their subtype. 203.4. An effect may add a subtype to a card.
203.5. When choosing a subtype, subtypes or a part of them that does not exist cannot be chosen. Example: "Dragon" or "Cyber" is a subtype that doesn't exist as a single body so they can't be chosen.
(September 28th, 2018) Duel Masters - General Game Rules: Version 1.12 203. サブタイプ
203.3. いくつかの効果はサブタイプまたはその一部を参照します.その場合, 指定された名称をサブタイプに含むもの全てを参照します.例 .「ドラゴン」を指定する効果は, サブタイプに「ドラゴン」を含むカードをすべて参照します.
203.5. 効果でサブタイプを選ぶ場合, サブタイプの一部分や存在しないサブタイプを選ぶことはできません.例 .「ドラゴン」や「サイバー」は単体で存在しないサブタイプであり, 選ぶことはできません.