1, Bd) are very intimately fused together to form what is called the "lower lip" or labium, a firm transverse plate representing the fused basal portions of the maxillae, which may carry a small median "ligula," representing apparently the fused inner maxillary lobes, a pair of paraglossae (outer maxillary lobes), and a pair of palps.
The inner lobe (lacinia) of the first maxilla terminates in an articulated hook, while in the second maxillae (labium) both inner and outer lobes ("ligula" and "para-glossae") are much Gyrinus sulcatus reduced.
In specialized biting insects, such as beetles (Coleo C ptera), the labium tends to become a hard transverse plate bearing the pair of palps, a median structure - known as the ligula - formed of the conjoined laciniae, and a pair of small rounded processes - the reduced galeae - often called the " paraglossae," a term better avoided since it has been applied also to the maxillulae of Aptera, entirety different structures.
The long sucking " tongue " of bees is probably a modification of the ligula.
Ia, frons; b, clypeus (the pointed labrum beneath it); II, mandible; III, first maxilla; (a, base; b, sheath; c, piercer), III', inner view of sheath; IV, second maxillae forming rostrum (b, mentum; c, ligula).
- Diagram of a transverse section through the body-wall of a young Ligula, illustrating the microscopic structure of tapeworms. a.
Ligula, unsegmented externally, occurs in birds.
E, First maxilla; a, cardo; b, stipes; c, galea; d, lacinia; e, palp. B, Second maxillae (Labium); a, mentum; b, ligula (between the two galeae); c, c, palps.
a, mandible; b, c, palp and lacinia of first maxilla; d, e, g, h, mentum, palp, fused laciniae (ligula or "tongue") and galea of 2nd maxillae.
The tenth abdominal segment carries a pair of jointed cerci which are often elongate, and the feelers are always long, while the jaws are usually feeble and membranous, though the typical parts of a mandibulate mouth are present - mandibles, maxillae with inner and outer lobes and palps, and second maxillae (labium) whose lacinae are not fused to form a ligula.
Structurally the Neuroptera are distinguished by elongate feelers, a large, free prothorax, a labium with the inner lobes of the second maxillae fused together to form a median ligula, membranous, net-veined wings without hairy covering, those of the two pairs being usually alike, the absence of abdominal cerci, and the presence of six or eight Malpighian tubes.
mxp, Maxillary palp. 1, Ligula or "tongue."
Its leaves have each a long sheath encircling the stem, and at the junction of the blade or "flag" with the sheath a small whitish outgrowth or "ligula."
Management and Business & Administration NVQs Maecenas sodales posuere ligula.
The more generalized Hymenoptera have the second maxillae but slightly modified, their inner lobes being fused to form a ligula (fig.
IV., 2nd maxillae, a, sub-mentum; b, mentum; c, ligula, forming beak; d, hypopharynx (shown also from front d', and behind d").
apis), a large and natural family of the zoological order Hymenoptera, characterized by the plumose form of many of their hairs, by the large size of a the basal segment of the foot, which is always elongate and in the hindmost limb sometimes as broad as the shin, and by the development of a "tongue" for sucking liquid food; this organ has been variously interpreted as the true insectan tongue (hypopharynx) or as a ligula formed by fused portions of the second maxillae (probably the latter).
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