Tungid fleas, one of which is commonly known as the sand flea, can cause such damage to a person. The tungid female embeds itself into the skin of the host until just the end of the abdomen is exposed. It swells to the size of a pea as its eggs develop.
Source: wiktionary
These same features are likely to be much reduced in other fleas, such as tungids and sticktights, that attach more firmly to the host and feed for long periods at a particular site.
Source: wiktionary
As well as fleas, which move freely in the home and pelage of the host, there are those, like the tungids (Tungidae) and alakurts (Vermipsyllidae), that burrow into its skin and become neosomic (Fig. 9.5).
Source: wiktionary
The Mongolid (Tungid and north Sinid) strain of the prehistoric Japanese must, to a large extent, be attributed to arrivals from Korea by way of the Tsushima straits, attested to by finds of clay vessels with pointed bottoms and with roller-stamped décor such as were made at Sobatu (north Kyushu).
Source: wiktionary
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