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15 results for “Dilocarcinus”
FIGURES 32–33. Temnocephala pignalberiae. 32 in Temnocephala pignalberiae Dioni, 1967 (Platyhelminthes, Temnocephalida) from two allopatric populations of Dilocarcinus pagei Stimpson, 1861 (Crustacea, Decapoda) — first record for Brazil
FIGURES 32–33. Temnocephala pignalberiae. 32. partial view of the reproductive system, observed with Nomarski´s DIC microscopy: male organs – seminal vesicle (sv), prostatic bulb (pb), and prostatic secretion (ps); female organs – ovary (ov), distal vagina (dv), vaginal sphincter with the anterior vaginal portion (avs), and the posterior vaginal portion (pvs). Scale bar = 50 µm. 33. enlarged prostatic bulb showing the wall openings (black arrows), the prostatic secretion (ps), and cirrus (c), both from a specimen from Poconé. Scale bar = 50 µm.
FIGURES 22–26 in Temnocephala pignalberiae Dioni, 1967 (Platyhelminthes, Temnocephalida) from two allopatric populations of Dilocarcinus pagei Stimpson, 1861 (Crustacea, Decapoda) — first record for Brazil
FIGURES 22–26. Temnocephala pignalberiae, photomicrographs of seminal vesicle, prostatic bulb, and cirrus, dissected from specimens from Poconé, mounted in Faure´s mounting medium, observed with Nomarski´s DIC microscopy. 22. seminal vesicle, prostatic bulb, and cirrus. Scale bar = 50 µm. 23. prostatic bulb and cirrus. Scale bar = 50 µm. 24. cirrus, showing the proximal end of the shaft curving in (black arrow). Scale bar = 10 µm. 25–26. cirrus introvert observed in two different focusing planes, indicating the proximal limit of the spineless introvert (white head arrow) and the retractor muscles (black arrows). Scale bar = 10 µm.
FIGURES 19–21. Temnocephala pignalberiae seen with SEM. 19 in Temnocephala pignalberiae Dioni, 1967 (Platyhelminthes, Temnocephalida) from two allopatric populations of Dilocarcinus pagei Stimpson, 1861 (Crustacea, Decapoda) — first record for Brazil
FIGURES 19–21. Temnocephala pignalberiae seen with SEM. 19. entire specimen from Poconé, showing the dorsolateral 'excretory' syncytial plates (black head arrows) and position of excretory pores (n – white arrows). Scale bar = 200 µm. 20. left DLSP, seen in a specimen from Poconé, (n – white arrow). Scale bar = 100 µm. 21. left DLSP, seen in a specimen from Bebedouro, (n – white arrow). Scale bar = 100 µm.
FIGURES 14–18. Temnocephala pignalberiae. 14 in Temnocephala pignalberiae Dioni, 1967 (Platyhelminthes, Temnocephalida) from two allopatric populations of Dilocarcinus pagei Stimpson, 1861 (Crustacea, Decapoda) — first record for Brazil
FIGURES 14–18. Temnocephala pignalberiae. 14. incomplete diagram of an adult specimen, ventral view, showing: adhesive disk (ad), anterior testis (at), excretory ampullae (ea), dorsal vitelline glands (vg), Haswell glands (hg), large disk glands (paranephrocytes?) (ldg (p)), mouth (m), posterior testis (pt), pharynx (ph), and tentacles (t). Scale bar = 1 mm. 15. female reproductive organs: anterior portion of the vaginal sphincter (avs), genital atrium (ga), ovary (ov), posterior portion of the vaginal sphincter (pvs), vagina (va), vesicula resorbens (vr), vitelline glands duct (vgd), seminal receptacles (sr). Scale bar = 50 µm. 16. male reproductive system: cirrus (c), opening in the prostatic bulb wall (black head arrow), prostatic bulb (pb), prostatic cells (pc), prostatic secretion (ps), seminal vesicle (sv), and vasa deferentia (vd), Scale bar = 50 µm. 17. cirrus of specimens from Poconé, proximal limit of the introvert (arrow), proximal shaft base curving in. Scale bar = 25 µm. 18. cirrus of specimens from Bebedouro, proximal limit of the introvert (arrow), proximal shaft base not curving in. Scale bar = 25 µm.
FIGURES 1–2 in Temnocephala pignalberiae Dioni, 1967 (Platyhelminthes, Temnocephalida) from two allopatric populations of Dilocarcinus pagei Stimpson, 1861 (Crustacea, Decapoda) — first record for Brazil
FIGURES 1–2. Dilocarcinus pagei, showing the absence of eggs of T. pignalberiae on the external dorsal and ventral surfaces, including the pereiopods. 1. adult female specimen in dorsal view. Scale bar = 1.5 cm. 2. adult female specimen in ventral view. Scale bar = 1.5 cm. FIGURES 3–7. Temnocephala pignalberiae. 3. live eggs deposited on the tissue (asterisks) covering the inner upper surface of the carapace. Scale bar = 500 µm. 4. fixed eggs cemented to the tissue covering the inner upper surface of the carapace. Scale bar = 1 mm. 5. fixed eggs cemented to the tissue covering the inner upper surface of the carapace, in higher magnification (two asterisks). Scale bar = 500 µm. 6. unhatched egg showing the filament (black head arrow). Scale bar = 250 µm. 7. adult, killed in hot formalin showing the correct shape of the body, stained in aceto-carmine/fast green. Scale bar = 1 mm.
FIGURES 34–37. Temnocephala pignalberiae. 34 in Temnocephala pignalberiae Dioni, 1967 (Platyhelminthes, Temnocephalida) from two allopatric populations of Dilocarcinus pagei Stimpson, 1861 (Crustacea, Decapoda) — first record for Brazil
FIGURES 34–37. Temnocephala pignalberiae. 34. adult specimen pressed between slide and cover slip, showing that too much pressure may be good to allow all characters to be observed in the same focusing plane, but alters the body shape. Scale bar = 1 mm. 35. Haswell glands (black head arrows). Scale bar = 200 µm. 36. mouth (m), mouth sphincter (ms), and pharyngeal sphincter (ps). Scale bar = 200 µm. 37. male and female reproductive system: anterior portion of the vaginal sphincter (avs), cirrus (c), deferent duct (dd), ejaculatory duct (ed), genital pore (gp), genital atrium (ga), ovary (ov), posterior portion of the vaginal sphincter (pvs), prostatic bulb (pb), seminal receptacles (sr), seminal vesicle (sv), vagina (va), and vesicula resorbens (vr). Scale bar = 100 µm.
FIGURES 8–13. Temnocephala pignalberiae. 8–9 in Temnocephala pignalberiae Dioni, 1967 (Platyhelminthes, Temnocephalida) from two allopatric populations of Dilocarcinus pagei Stimpson, 1861 (Crustacea, Decapoda) — first record for Brazil
FIGURES 8–13. Temnocephala pignalberiae. 8–9. specimens from Poconé fixed in hot formalin showing the typical body shape and the red-eyes (black head arrow). 10–11. specimens from Bebedouro fixed in hot formalin showing the typical body shape and the red-eyes (black head arrow). Same scale bar to Figs. 8-11 = 500 µm. 12. carapace of crab killed with cold ethanol showing the specimens and many eggs cemented to the tissue which covers the inner upper surface of the carapace. Scale bar = 2 mm. 13. specimens killed with cold ethanol, together with the host, showing the altered body shape. Scale bar = 2 mm.
Figure 7 in Population biology of the freshwater crab Dilocarcinus pagei Stimpson, 1861 (Decapoda: Trichodactylidae) in the Araguari River, south-eastern Brazil
Figure 7. (a) Frequency of different demographic classes according to rainfall gradient. (b) Frequency of different demographic classes according to water level reservoir gradient. AF = adult females; AM = adult males, FEJ = female with eggs and juveniles; JF = juvenile females; JM = juvenile males.
Figure 5 in Population biology of the freshwater crab Dilocarcinus pagei Stimpson, 1861 (Decapoda: Trichodactylidae) in the Araguari River, south-eastern Brazil
Figure 5. Monthly distribution of carapace width frequency of individuals of Dilocarcinus pagei Stimpson, 1861. AF = adult females; AM = adult males, CW = carapace width, FEJ = female with eggs and juveniles; JF = juvenile females; JM = juvenile males.
Figure 8 in Population biology of the freshwater crab Dilocarcinus pagei Stimpson, 1861 (Decapoda: Trichodactylidae) in the Araguari River, south-eastern Brazil
Figure 8. Canonical correspondence analysis between different demographic groups and environmental variables of rainfall and reservoir water level. AF = adult females; AM = adult males, FEJ = female with eggs and juveniles; JF = juvenile females; JM = juvenile males.
Figure 6 in Population biology of the freshwater crab Dilocarcinus pagei Stimpson, 1861 (Decapoda: Trichodactylidae) in the Araguari River, south-eastern Brazil
Figure 6. (a) Sex ratio by size classes and total number of individuals of Dilocarcinus pagei Stimpson, 1861 sampled during the study period. (b) Monthly sex ratio of individuals of Dilocarcinus pagei. White circles indicate a significant difference in relation to the 1:1 ratio (binomial test, p <.05), and black circles indicate that there was no significant difference. Values above and below 0.5 indicate deviations for males and females, respectively. CW = carapace width.
Figure 4 in Population biology of the freshwater crab Dilocarcinus pagei Stimpson, 1861 (Decapoda: Trichodactylidae) in the Araguari River, south-eastern Brazil
Figure 4. Frequency of carapace width of Dilocarcinus pagei Stimpson, 1861. AF = adult females; AM = adult males, CW = carapace width, FEJ = female with eggs and juveniles; JF = juvenile females; JM = juvenile males.
Figure 2 in Population biology of the freshwater crab Dilocarcinus pagei Stimpson, 1861 (Decapoda: Trichodactylidae) in the Araguari River, south-eastern Brazil
Figure 2. (a) Dilocarcinus pagei Stimpson, 1861; (b) abdomen width; (c) carapace width; (d) right propodus length; (e) female with eggs; (f) female with eggs and juveniles in the abdominal cavity (both at the same time); (g) female with juveniles in the abdominal cavity. Scale bar: 20 mm.
Figure 1 in Population biology of the freshwater crab Dilocarcinus pagei Stimpson, 1861 (Decapoda: Trichodactylidae) in the Araguari River, south-eastern Brazil
Figure 1. Location (a) and characterisation (b–e) of the study area in the Araguari River, Tupaciguara, Minas Gerais, Brazil. The sampled section is shown inside the red circle. b = partially exposed Melo Viana bridge found in the original riverbed. The Melo Viana bridge connected the cities of Araguari and Tupaciguara before the dam´s construction in the 1970s when it was submerged by the reservoir filling. b–d = grasses and macrophytes on the banks; e = burrows on the slopes.
Figure 3 in Population biology of the freshwater crab Dilocarcinus pagei Stimpson, 1861 (Decapoda: Trichodactylidae) in the Araguari River, south-eastern Brazil
Figure 3. Sampled data on local rainfall and water level in the reservoir during the sampling period, from September 2020 to November 2021.
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