Haematopinus vs. Linognathus Lice: Differences and Examples
Haematopinus and Linognathus are important genera of sucking lice that affect domestic animals. They belong to the family Haematopinidae and Linognathidae, respectively, and can be differentiated based on morphological features such as head shape, leg size, abdominal structure, bristles, and spiracular openings. The following table summarizes the key differences between Haematopinus and Linognathus lice, along with important examples of each genus.
| Haematopinidae | Linognathidae |
|---|---|
| Head is blunt and sharp. | Head is lengthy, and the abdomen is narrow. |
| All the legs are equal in size. | 1st pair is small; 2nd and 3rd pairs are longer. |
| Abdominal segments possess a single row of minute bristles. | Double row of minute bristles. |
| Abdomen is broad. | Abdomen is narrow. |
| Haematopinidae lice are mostly seen on the tail. | Linognathidae lice are uniformly seen on the body. |
| Chitinized paratergal plates are present on the abdomen. | Abdomen is transparent. |
| Spiracular openings are seen on the lateral aspect of each abdominal segment and are prominent. | Spiracular openings are very transparent. |
| Examples: Haematopinus suis, Haematopinus asini, Haematopinus eurysternus | Examples: Linognathus vituli, Linognathus ovillus, Linognathus setosus |
