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. 2021 Feb 14;10(2):392. doi: 10.3390/cells10020392

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Schematic diagram of alimentary canal and salivary glands of Thrips palmi. FG—foregut; MG1—midgut 1; MG2—midgut 2; MG3—midgut 3; HG—hindgut; PSG—principal salivary gland; TSG—tubular salivary gland; Lg—ligament; MT—Malpighian tubules. PSG is connected to the anterior midgut by ligaments. TSG originates from the basal region of PSG and meets the alimentary canal at the junction of MG1 and MG2.