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Figure 2 from: Mrak P, Bogataj U, Štrus J, Žnidaršič N (2015) Formation of the hindgut cuticular lining during embryonic development of Porcellio scaber (Crustacea, Isopoda). In: Taiti S, Hornung E, Štrus J, Bouchon D (Eds) Trends in Terrestrial Isopod Biology. ZooKeys 515: 93–109. https://doi.org/10.3897/zookeys.515.9468

Figure 2 - Apical matrices in the hindgut of Porcellio scaber late embryos. EC - epithelial cell A The hindgut cells (EC) in stage 16 embryos are covered by a substantial apical matrix with intensely ruffled surface (AM). The matrix consists of an electron dense lamina (black →) and underlying more electron lucent homogenous material. The apical membrane displays irregularly arranged protrusions (white →) B, C, D In the stage 18 embryos the apical matrix of the hindgut (AM) is extensive. The surface lamina covers the matrix, which displays a distal region of medium density and a proximal lucent region. The lamina of this matrix is trilayered (B inset). A new electron dense lamina (B, D - black →) is evident above the apical membrane protrusions (B, D - white →). The new lamina is mostly continuous, though in some regions it still appears in fragments (C - black →) E, F In the prehatching embryo of stage 19 the hindgut apical matrix consists of a distal trilayered lamina (black →), an electron dense material, accumulating underneath the lamina (F - white →) and underlying lucent material (E - *). Microvilli-like protrusions of the apical plasma membrane are evident (E - white →). The gut lumen is filled with homogenous material.

Figure 1 from: Mrak P, Bogataj U, Štrus J, Žnidaršič N (2015) Formation of the hindgut cuticular lining during embryonic development of Porcellio scaber (Crustacea, Isopoda). In: Taiti S, Hornung E, Štrus J, Bouchon D (Eds) Trends in Terrestrial Isopod Biology. ZooKeys 515: 93–109. https://doi.org/10.3897/zookeys.515.9468

Figure 1 - Hindgut epithelium and cuticle in Porcellio scaber adults. A Semithin section of the hindgut anterior chamber. Gut cells protrude apically into the gut lumen. The apical membrane forms an apical labyrinth (AL), that is covered with the cuticle (C). N – nucleus of gut cell B Semithin section of the hindgut papillate region. Gut cells bulge basally into the hemocoel. Apical and basal labyrinths (AL, BL) are evident. Cuticle covers apical cell surface (C). N – nucleus of gut cell C, D Ultrastructure of the cuticle in anterior chamber. The cuticle is composed of thin electron dense epicuticle (EPI) and much thicker ''lamellated'' electron lucent procuticle (PRO). Several thin sublayers are discernible in the outermost part of the epicuticle (D inset - white →). A layer of medium electron density is visible between the epi- and procuticle (D - black →). A cuticular spine is present on the cuticle surface E, F Ultrastructure of the gut cuticle in papillate region. Epicuticle (EPI) and procuticle (PRO) are about the same thickness. Both are composed of morphologically homogenous matrix. Abundant mitochondria are observed closely to the membranes of the apical labyrinth (AL) F Several thin sublayers in the outermost region of the epicuticle are visible.

Figure 2 from: Horvathova T, Antol A, Czarnoleski M, Kramarz P, Bauchinger U, Labecka A, Kozłowski J (2015) Does temperature and oxygen affect duration of intramarsupial development and juvenile growth in the terrestrial isopod Porcellio scaber (Crustacea, Malacostraca)? ZooKeys 515: 67-79. https://doi.org/10.3897/zookeys.515.9353

Figure 2 - The relationship between female post-parturial mass and the duration of marsupial development in cold and warm environment in the isopod Porcellio scaber.

Figure 3 from: Horvathova T, Antol A, Czarnoleski M, Kramarz P, Bauchinger U, Labecka A, Kozłowski J (2015) Does temperature and oxygen affect duration of intramarsupial development and juvenile growth in the terrestrial isopod Porcellio scaber (Crustacea, Malacostraca)? ZooKeys 515: 67-79. https://doi.org/10.3897/zookeys.515.9353

Figure 3 - The effect of normoxia and hypoxia in cold and warm environment on juvenile growth (expected marginal means±CI) in the isopod Porcellio scaber.

Figure 4 from: Tuf IH, Drábková L, Šipoš J (2015) Personality affects defensive behaviour of Porcellio scaber (Isopoda, Oniscidea). In: Taiti S, Hornung E, Štrus J, Bouchon D (Eds) Trends in Terrestrial Isopod Biology. ZooKeys 515: 159–171. https://doi.org/10.3897/zookeys.515.9429

Figure 4 - Correlations between duration (in seconds) of TI of Porcellio scaber induced by the different treatments: a correlation between duration of TI induced by squeeze and drop b correlation between duration of TI induced by touch and drop c correlation between duration of TI induced by touch and squeeze. Data were transformed by decimal logarithm.

Figure 1 from: Horvathova T, Antol A, Czarnoleski M, Kramarz P, Bauchinger U, Labecka A, Kozłowski J (2015) Does temperature and oxygen affect duration of intramarsupial development and juvenile growth in the terrestrial isopod Porcellio scaber (Crustacea, Malacostraca)? ZooKeys 515: 67-79. https://doi.org/10.3897/zookeys.515.9353

Figure 1 - The effect of normoxia and hypoxia in cold and warm environment on the duration of intramarsupial development (expected marginal means ±CI) in the isopod Porcellio scaber.

Figure 2 from: Tuf IH, Drábková L, Šipoš J (2015) Personality affects defensive behaviour of Porcellio scaber (Isopoda, Oniscidea). In: Taiti S, Hornung E, Štrus J, Bouchon D (Eds) Trends in Terrestrial Isopod Biology. ZooKeys 515: 159–171. https://doi.org/10.3897/zookeys.515.9429

Figure 2 - Tonic immobility of Porcellio scaber induced by different treatments: a probability of inducing TI by the first, the second and the third treatment b probability of inducing TI by different treatments c endurance of TI following the first, the second and the third treatment d endurance of TI following different treatments e sensitivity, i.e. promptness of inducing TI by the first, the second and the third treatment f sensitivity, i.e. promptness of inducing TI by different treatments. (*** p < 0.001; ** p < 0.01; * p ≤ 0.05)

Figure 1 from: Tuf IH, Drábková L, Šipoš J (2015) Personality affects defensive behaviour of Porcellio scaber (Isopoda, Oniscidea). In: Taiti S, Hornung E, Štrus J, Bouchon D (Eds) Trends in Terrestrial Isopod Biology. ZooKeys 515: 159–171. https://doi.org/10.3897/zookeys.515.9429

Figure 1 - Design of one experimental set. Dashed arrows symbolise repeated stimuli applied if previous stimulus did not evoke tonic immobility. Experimental sets were applied repeatedly over a three week period; each individual was exposed to five experimental sets with 4 days intervals between.

Figure 3 from: Tuf IH, Drábková L, Šipoš J (2015) Personality affects defensive behaviour of Porcellio scaber (Isopoda, Oniscidea). In: Taiti S, Hornung E, Štrus J, Bouchon D (Eds) Trends in Terrestrial Isopod Biology. ZooKeys 515: 159–171. https://doi.org/10.3897/zookeys.515.9429

Figure 3 - Endurance of tonic immobility of Porcellio scaber of different body sizes induced by treatments. (*** p < 0.001; ** p < 0.01; * p ≤ 0.05)

Supplementary material 5 from: Bogataj U, Praznik M, Mrak P, Štrus J, Tušek-Žnidarič M, Žnidaršič N (2018) Comparative ultrastructure of cells and cuticle in the anterior chamber and papillate region of Porcellio scaber (Crustacea, Isopoda) hindgut. In: Hornung E, Taiti S, Szlavecz K (Eds) Isopods in a Changing World. ZooKeys 801: 427-458. https://doi.org/10.3897/zookeys.801.22395

SI Figure 5. Boxplots depicting individual measurements of basal membrane labyrinth depth :

Supplementary material 3 from: Bogataj U, Praznik M, Mrak P, Štrus J, Tušek-Žnidarič M, Žnidaršič N (2018) Comparative ultrastructure of cells and cuticle in the anterior chamber and papillate region of Porcellio scaber (Crustacea, Isopoda) hindgut. In: Hornung E, Taiti S, Szlavecz K (Eds) Isopods in a Changing World. ZooKeys 801: 427-458. https://doi.org/10.3897/zookeys.801.22395

SI Figure 3. Boxplots depicting individual measurements of basal lamina thickness :

Supplementary material 2 from: Bogataj U, Praznik M, Mrak P, Štrus J, Tušek-Žnidarič M, Žnidaršič N (2018) Comparative ultrastructure of cells and cuticle in the anterior chamber and papillate region of Porcellio scaber (Crustacea, Isopoda) hindgut. In: Hornung E, Taiti S, Szlavecz K (Eds) Isopods in a Changing World. ZooKeys 801: 427-458. https://doi.org/10.3897/zookeys.801.22395

SI Figure 2. Boxplots depicting individual measurements of cuticle thickness :

Supplementary material 4 from: Bogataj U, Praznik M, Mrak P, Štrus J, Tušek-Žnidarič M, Žnidaršič N (2018) Comparative ultrastructure of cells and cuticle in the anterior chamber and papillate region of Porcellio scaber (Crustacea, Isopoda) hindgut. In: Hornung E, Taiti S, Szlavecz K (Eds) Isopods in a Changing World. ZooKeys 801: 427-458. https://doi.org/10.3897/zookeys.801.22395

SI Figure 4. Boxplots depicting individual measurements of apical membrane labyrinth depth :

Supplementary material 1 from: Bogataj U, Praznik M, Mrak P, Štrus J, Tušek-Žnidarič M, Žnidaršič N (2018) Comparative ultrastructure of cells and cuticle in the anterior chamber and papillate region of Porcellio scaber (Crustacea, Isopoda) hindgut. In: Hornung E, Taiti S, Szlavecz K (Eds) Isopods in a Changing World. ZooKeys 801: 427-458. https://doi.org/10.3897/zookeys.801.22395

SI Figure 1. Boxplots depicting individual measurements of cell size and cell nuclei diameter :

Figure 6 from: Nako J-D, Lee NS, Wright JC (2018) Water vapor absorption allows for volume expansion during molting in Armadillidium vulgare and Porcellio dilatatus (Crustacea, Isopoda, Oniscidea). In: Hornung E, Taiti S, Szlavecz K (Eds) Isopods in a Changing World. ZooKeys 801: 459-479. https://doi.org/10.3897/zookeys.801.23344

Figure 6 Mean measured (blue) and expected (red) values for hemolymph osmolality in Armadillidiumvulgare during molting in 100 % RH. Expected values are derived from the product of the mean intermolt osmolality (green symbols) and the proportional changes in blood volume over the molt cycle (see text). Bars show ± 1 SEM with sample sizes. Molt stages as in Figs 1–4. Asterisks denote significant differences between measured and expected means (2-sample t-test). * P < 0.05; ** P < 0.01. (*) P = 0.056.

Figure 5 from: Nako J-D, Lee NS, Wright JC (2018) Water vapor absorption allows for volume expansion during molting in Armadillidium vulgare and Porcellio dilatatus (Crustacea, Isopoda, Oniscidea). In: Hornung E, Taiti S, Szlavecz K (Eds) Isopods in a Changing World. ZooKeys 801: 459-479. https://doi.org/10.3897/zookeys.801.23344

Figure 5 Mean masses of Ligidiumlapetum in 100% RH. The mean mass of the surviving animals on Day 2 is the mean % mass loss of those animals, subtracted from the mean of all animals at Day 0. No animal survived to Day 3 or initiated ecdysis.

Figure 4 from: Nako J-D, Lee NS, Wright JC (2018) Water vapor absorption allows for volume expansion during molting in Armadillidium vulgare and Porcellio dilatatus (Crustacea, Isopoda, Oniscidea). In: Hornung E, Taiti S, Szlavecz K (Eds) Isopods in a Changing World. ZooKeys 801: 459-479. https://doi.org/10.3897/zookeys.801.23344

Figure 4 Mass changes of Porcelliodilatatus during molting at 97 % RH and without food. Data labels and other details as for Fig. 1.

Figure 1 from: Nako J-D, Lee NS, Wright JC (2018) Water vapor absorption allows for volume expansion during molting in Armadillidium vulgare and Porcellio dilatatus (Crustacea, Isopoda, Oniscidea). In: Hornung E, Taiti S, Szlavecz K (Eds) Isopods in a Changing World. ZooKeys 801: 459-479. https://doi.org/10.3897/zookeys.801.23344

Figure 1 A Mass changes of Armadillidiumvulgare during molting at 100 % RH, without access to food. Pre- and post- labels refer to the number of days before/after ecdysis with data showing the % mass change over the prior 24-h period. PE = posterior ecdysis; AE = anterior ecdysis. Bars show ± SEM with sample sizes B Mean masses of 4 of these animals, showing the characteristic pattern of mass gain, peaking between PE and AE, followed by loss over the 3 to 4-day post-molt period.

Figure 2 from: Nako J-D, Lee NS, Wright JC (2018) Water vapor absorption allows for volume expansion during molting in Armadillidium vulgare and Porcellio dilatatus (Crustacea, Isopoda, Oniscidea). In: Hornung E, Taiti S, Szlavecz K (Eds) Isopods in a Changing World. ZooKeys 801: 459-479. https://doi.org/10.3897/zookeys.801.23344

Figure 2 Mass changes of Armadillidiumvulgare during molting in 97 % RH, without access to food. Details as in Figure 1. PE2 refers to the small number of animals reaching a second day after PE without completing the anterior ecdysis.

Figure 7 from: Nako J-D, Lee NS, Wright JC (2018) Water vapor absorption allows for volume expansion during molting in Armadillidium vulgare and Porcellio dilatatus (Crustacea, Isopoda, Oniscidea). In: Hornung E, Taiti S, Szlavecz K (Eds) Isopods in a Changing World. ZooKeys 801: 459-479. https://doi.org/10.3897/zookeys.801.23344

Figure 7 A Percentage mass change between 5 days premolt and anterior ecdysis for Armadillidiumvulgare maintained in 100 % RH (blue) and 97 % RH (red) and plotted as a function of premolt mass. Trendlines show best-fit logarithmic curves. Animals in 97 % RH achieve slightly smaller proportional mass changes to those in saturated air, consistent with the reduced vapor pressure gradient for WVAB Log-log plot showing the relationship between fractional mass-gain and pre-molt mass in 100 % RH (% mass gain α M-0.676).