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Figure 5 in New hosts and distribution records for bopyrid isopods parasitising alpheid shrimps (Decapoda, Alpheidae) in the SW Gulf of Mexico and Mexican Caribbean

Figure 5. Capitetragonia alphei (Richardson, 1900), CNCR 34973. a) antenna and antennule of female; b) maxilliped; c) female pleon, ventral view; d) fifth pereopod of male. Scale bar = 0.5 mm in a; 1.0 mm in b-c; 0.1 mm in d.

Figure 4 in New hosts and distribution records for bopyrid isopods parasitising alpheid shrimps (Decapoda, Alpheidae) in the SW Gulf of Mexico and Mexican Caribbean

Figure 4. Bopyrione synalphei Bourdon and Markham, 1980. a) first oostegite of female parasitising Synalpheus elizabethae (YUC-CC-255-11-006556E), external view; b) first oostegite of female parasitising S. brooksi (YUC-CC-255-11-006555A), external view, c) same, internal view; d) Pleon of female parasitising S. elizabethae (YUC-CC-255-11-006556A), dorsal view. Scale bar = 0.5 mm.

Figure 2 in New hosts and distribution records for bopyrid isopods parasitising alpheid shrimps (Decapoda, Alpheidae) in the SW Gulf of Mexico and Mexican Caribbean

Figure 2. Bopyrid males parasitising Alpheus and Synalpheus shrimps at the SW Gulf of Mexico and Mexican Caribbean. a) Bopyrella harmopleon Bowman, 1956, YUC-CC-255-11-006553; b) Bopyrione synalphei Bourdon and Markham, 1980, YUC-CC-255-11-006556; c) Capitetragonia alphei (Richardson, 1900), CNCR 34973; d) Parabopyrella mortenseni (Nierstraz and Brender à Brandis, 1929), CNCR 34975; e) Eophrixus subcaudalis (Hay, 1917), CNCR 5254. Scale bar = 0.5 mm in a-b; 1.0 mm in c-e.

Figure 1 in New hosts and distribution records for bopyrid isopods parasitising alpheid shrimps (Decapoda, Alpheidae) in the SW Gulf of Mexico and Mexican Caribbean

Figure 1. Bopyrid females parasitising Alpheus and Synalpheus shrimps at the SW Gulf of Mexico and Mexican Caribbean. a) Bopyrella harmopleon Bowman, 1956, YUC-CC-255-11-006553; b) Bopyrione synalphei Bourdon and Markham, 1980, YUC-CC-255-11-006555; c) Capitetragonia alphei (Richardson, 1900), CNCR 34973; d) Parabopyrella lata (Nierstraz and Brender à Brandis, 1929), CNCR 34974; e) Parabopyrella mortenseni (Nierstraz and Brender à Brandis, 1929), CNCR 34975; f) Eophrixus subcaudalis (Hay, 1917), CNCR 5254. Scale bar = 1.0 mm.

Figure 8 in New hosts and distribution records for bopyrid isopods parasitising alpheid shrimps (Decapoda, Alpheidae) in the SW Gulf of Mexico and Mexican Caribbean

Figure 8. Eophrixus subcaudalis (Hay, 1917), CNCR 5254. a) maxilliped; b) first oostegite, external view; c) first oostegite, internal view; d) lateral plates of the fourth pereomere, dorsal view. Scale bar = 0.5 mm.

Figure 6 in New hosts and distribution records for bopyrid isopods parasitising alpheid shrimps (Decapoda, Alpheidae) in the SW Gulf of Mexico and Mexican Caribbean

Figure 6. Parabopyrella lata (Nierstraz and Brender à Brandis, 1929), CNCR 34974. a) barbula; b) first oostegite, external view; c) first oostegite, internal view. Scale bar = 0.5 mm.

Figure 8 in Distribution, habitat and food preferences of sympatric high intertidal isopod species Ligia occidentalis and Ligia pallasii (Ligiidae: Oniscidea)

Figure 8. Differences in food preference for the two Ligia species [Ligia occidentalis (LO): F (4,53.45) = 15.918, p = 0.0001; Ligia pallasii (LP): F (4,53,45) = 15.928, p = 0.0004] as shown for mean dry weight consumed for each food type (error bars are ± 1 SE). Changes in weight of the different food types without isopods (none: F (4,22.15) = 0.699, p = 0.601) show minimal changes in weight possibly because of microbial activity. Values of p are based on analysis of variance. Letters above bars indicate significant differences among means (Post hoc Tukey tests).

Figure 6 in Distribution, habitat and food preferences of sympatric high intertidal isopod species Ligia occidentalis and Ligia pallasii (Ligiidae: Oniscidea)

Figure 6. Results of mesocosm experiments show that all treatments containing Ligia showed a significant decrease in dry weight of algal biomass compared with a control (none). The reduction in algal biofilm caused by Ligia pallasii (LP) treatment was significantly lower than that by either the Ligia occidentalis (LO) treatment or the combination of the two species (LO+LP). Letters above bars indicate significant differences among means (Post hoc Tukey tests).

Figure 5 in Distribution, habitat and food preferences of sympatric high intertidal isopod species Ligia occidentalis and Ligia pallasii (Ligiidae: Oniscidea)

Figure 5. Temperature records at Mussel Point cave (A) and Bodega Harbor (B) represented as mean temperature per month (average) and the monthly average of the daily maximum (max) and minimum (min) temperatures.

Figure 4 in Distribution, habitat and food preferences of sympatric high intertidal isopod species Ligia occidentalis and Ligia pallasii (Ligiidae: Oniscidea)

Figure 4. Monthly survey of Ligia pallasii at Mussel Point from March 2007 to December 2010. Overall abundance is represented as mean number of individuals per square metre and is composed of numbers from five different size classes (see key).

Figure 3 in Distribution, habitat and food preferences of sympatric high intertidal isopod species Ligia occidentalis and Ligia pallasii (Ligiidae: Oniscidea)

Figure 3. Monthly survey of Ligia occidentalis at Bodega Harbor from March 2007 to December 2010. Overall abundance is represented as mean number of individuals per square metre and is composed of numbers from four different size classes (see key).

Figure 2 in Distribution, habitat and food preferences of sympatric high intertidal isopod species Ligia occidentalis and Ligia pallasii (Ligiidae: Oniscidea)

Figure 2. Relative abundance of Ligia occidentalis (LO) and Ligia pallasii (LP) along the surveyed coastline (x axis left to right represents latitudinal coordinates of sampling sites from south to north). LO showed slight but not significant decline in abundance towards the northern range of the distribution Spearman's ρ – 0.0863, p <|ρ| = 0.3680. LP showed a small but significant decline towards the southern range limit (positive correlation with increasing latitude Spearman's ρ 0.5499, p <|ρ| = 0.0001. Lines within sites mark area of range overlap (solid line range limit of species in plot, dashed line range limit of other Ligia species).

Figure 1 in Distribution, habitat and food preferences of sympatric high intertidal isopod species Ligia occidentalis and Ligia pallasii (Ligiidae: Oniscidea)

Figure 1. Ligia occidentalis (A) and Ligia pallasii (B, C) can be distinguished by the distance between the eyes and the shape of the caudal peduncle of the uropod. Sexual dimorphism is only present in L. pallasii (B, female; C, male). All scale bars represent 10 mm. Photos: J. Sones.

Figure 7 in Distribution, habitat and food preferences of sympatric high intertidal isopod species Ligia occidentalis and Ligia pallasii (Ligiidae: Oniscidea)

Figure 7. Feeding preferences (mean rank ± 1 SE) of Ligia pallasii and Ligia occidentalis for different species of algal wrack (Nereocystis, Costaria, Ulva, Mazaella and Fucus); n = 20 (L. pallasii), 19 (L. occidentalis). Different letters indicate significant differences in rank of pairwise comparisons after Bonferoni corrections.

Figure 3. Pseudostegias setoensis Shiino, 1933 in Three abdominal parasitic isopods (Isopoda: Epicaridea: Bopyridae: Athelginae) on hermit crabs from China and Hong Kong

Figure 3. Pseudostegias setoensis Shiino, 1933. (A–I) Female (CIEA920301): (A) dorsal view; (B) ventral view; (C) right antennule and antennae; (D) right maxilliped, external view; (E) right side of barbula; (F) right oostegite 1, external view; (G) right oostegite 1, internal view; (H) right pereopod 1; (I) right pereopod 6. (J–M) Male (CIEA920302): (J) dorsal view; (K) ventral view; (L) right antennule and antennae; (M) left pereopod 5. Scale bars: 1 mm for A, B; 0.17 mm for C, H, I; 0.35 mm for D; 0.40 mm for E, F, G; 0.30 mm for J, K; 0.12 mm for L, M.

Figure 5. Pseudostegias setoensis Shiino, 1933 in Three abdominal parasitic isopods (Isopoda: Epicaridea: Bopyridae: Athelginae) on hermit crabs from China and Hong Kong

Figure 5. Pseudostegias setoensis Shiino, 1933 (USNM1155302), scanning electron micrographs. Male (A–D), damage to body of host (E–G): (A) ventral view; (B) right antennae; (C) right pereopod 1; (D) left pereopod 7; (E) abdomen of host showing hole left by mouthparts of female (upward facing arrowhead) and attachment site of left pereopod 1 (downward facing arrowhead); (F) close-up of hole left by mouthparts of female; (G) close-up of attachment site of left pereopod 1, showing where dactyl and propodus were positioned (arrowhead). Scale bars: 1 mm for A; 100 µm for B, C, F, G; 200 µm for D; 500 µm for E.

Figure 4. Pseudostegias setoensis Shiino, 1933 in Three abdominal parasitic isopods (Isopoda: Epicaridea: Bopyridae: Athelginae) on hermit crabs from China and Hong Kong

Figure 4. Pseudostegias setoensis Shiino, 1933. (A–G) Female (USNM1155302): (A) ventral view; (B) ventral view of posterior region within brood chamber, with digitiform extensions (horizontal arrowheads) above crenulate margins of pereomeres; (C) left side of barbula; (D) right oostegite 1, internal view; (E) right maxilliped, external view; (F) fifth set of lateral plates; (G) scales on lateral plates. Scale bars: 5 mm for A; 1 mm for B, D, E; 500 µm for C, F; 25 µm for G.

Figure 2. Parathelges enoshimensis Shiino, 1950 in Three abdominal parasitic isopods (Isopoda: Epicaridea: Bopyridae: Athelginae) on hermit crabs from China and Hong Kong

Figure 2. Parathelges enoshimensis Shiino, 1950. (A–H) Female (CIEA614201): (A) dorsal view; (B) ventral view; (C) right antennule and antennae; (D) right maxilliped, external view; (E) right side of barbula; (F) right oostegite 1, external view; (G) right oostegite 1, internal view; (H) right pereopod 5. (I–L) Male (CIEA614202): (I) dorsal view; (J) ventral view; (K) right antennule and antennae; (L) left pereopod 1. Scale bars: 1 mm for A, B; 0.12 mm for C, E; 0.27 mm for D, H; 0.43 mm for F, G; 0.17 mm for I, J; 0.10 mm for K, L.

Figure 1. Athelges takanoshimensis Ishii, 1914 in Three abdominal parasitic isopods (Isopoda: Epicaridea: Bopyridae: Athelginae) on hermit crabs from China and Hong Kong

Figure 1. Athelges takanoshimensis Ishii, 1914. (A–H) Female (CIEA109801): (A) dorsal view; (B) ventral view; (C) left antennule and antennae; (D) left side of barbula; (E) left maxilliped, external view; (F) left oostegite 1, external view; (G) left oostegite 1, internal view; (H) right pereopod 5. (I–M) Male (CIEA109802): (I) Dorsal view; (J) ventral view; (K) left antennule and antennae; (L) left pereopod 3; (M) left pereopod 7. Scale bars: 1 mm for A, B; 0.08 mm for C, K, M, L; 0.38 mm for D; 0.33 mm for E; 0.50 mm for F, G; 0.14 mm for H; 0.28 mm for I, J.