Next Article in Journal
Physiological and Environmental Factors Affecting the Composition of the Ejaculate in Mosquitoes and Other Insects
Previous Article in Journal
Morphological and Molecular Analysis of Australian Earwigs (Dermaptera) Points to Unique Species and Regional Endemism in the Anisolabididae Family
Article Menu
Issue 3 (March) cover image

Export Article

Open AccessArticle
Insects 2019, 10(3), 73;

Morphology and Morphometry of the Midgut in the Stingless Bee Friesella schrottkyi (Hymenoptera: Apidae)

Department of General Biology, Universidade Federal de Viçosa, 36570-000 Viçosa, MG, Brazil
Instituto Federal de Mato Grosso-IFMT. Campus avançado Diamantino, 78400-970 Diamantino, MT, Brazil
Author to whom correspondence should be addressed.
Received: 25 January 2019 / Revised: 8 March 2019 / Accepted: 10 March 2019 / Published: 14 March 2019
PDF [5842 KB, uploaded 14 March 2019]


Friesella schrottkyi is a small stingless bee (3-mm long) important for agricultural and native forest pollination. This study describes the morphology and morphometry of the midgut in F. schrottkyi forager workers. The F. schrottkyi midgut presents a single-layered epithelium with digestive, regenerative and endocrine cells. The digestive cells are similar along the entire midgut length with a spherical nucleus, apex with long striated border, cytoplasmic granules in the apical region and well-developed basal labyrinth associated with mitochondria, suggesting they are multifunctional, synthesizing digestive enzymes and peritrophic matrix compounds and absorbing nutrients. Regenerative cells are located around the basal region organized in nests with some cells with a spherical nucleus. Phe-Met-Arg-Phe-NH2-amide (FMRFamide) positive endocrine cells are restricted to the posterior midgut region, suggesting a paracrine function in the midgut. This is the first morphological description of the F. schrottkyi midgut contributing to the comprehension of the digestive process of this bee. View Full-Text
Keywords: digestive cells; digestive tract; paracrine function digestive cells; digestive tract; paracrine function

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Oliveira, A.H.; Gonçalves, W.G.; Fernandes, K.M.; Barcellos, M.S.; Sampaio, W.M.S.; Lopes, M.P.; Martins, G.F.; Serrão, J.E. Morphology and Morphometry of the Midgut in the Stingless Bee Friesella schrottkyi (Hymenoptera: Apidae). Insects 2019, 10, 73.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Insects EISSN 2075-4450 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top