Improved Visualization of Alphitobius diaperinus (Panzer) (Coleoptera: Tenebrionidae)—Part II: Alimentary Canal Components and Measurements

Table 1

Mean length (mm) and standard deviation (SD) of alimentary canal of the Alphitobius diaperinus female and male beetles (>4 weeks post eclosion) and the late instars (7–9th). Measured by microscopy.

Foregut

Midgut

Small intestine

Large intestine

Rectum

Total alimentary canal

Length

SD

Length

SD

Length

SD

Length

SD

Length

SD

Length

SD

Adult female

1.70

±0.30^a

9.22

±0.71^a,b

3.24

±0.35^a

2.30

±0.18^a

2.29

±0.32^a

18.74

±1.11^a

Adult male

1.75

±0.12^a

8.77

±1.89^a

3.14

±0.40^a

2.43

±0.32^a

1.26

±0.19^a,b

17.35

±1.83^a

Late instar

2.36

±0.38^a

9.98

±1.94^b

3.50

±0.46^a

2.14

±0.50^a

0.64

±0.10^b

18.61

±2.30^a

Adult*

1.73

±0.22

9.00

±1.37

3.19

±0.36

2.36

±0.25

1.78

±597.5

18.04

±1.61

*Mean compilation of adult male and adult female measurements.
a-bSample groups (late instar, female, and male) with the same letter are not significantly different (𝑃<0.05) as compared within the anatomical segment of the gut (nonparametric 2-way ANOVA with Bonferroni posttests).