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36 results for “Crepidula”
Body mass index does not decline during winter for the sedentary marine gastropod Crepidula fornicata
<p><span>Extremes in environmental conditions can limit growth and reproduction of animals. Sedentary marine animals are particularly susceptible to winter food limitation since they cannot relocate to more favorable conditions. Winter conditions have been linked to tissue mass declines as high as 70% in several temperate-zone suspension-feeding bivalve species; however, no comparable studies have been conducted on intertidal gastropods. Here, we investigate whether the suspension-feeding intertidal marine gastropod Crepidula fornicata also loses substantial tissue mass during the winter. We calculated body mass index (BMI; mg dry weight/(cm shell length)3) for individuals collected at different times of year for seven years from 2009-2019 and determined whether winter or environmental conditions influenced BMI. Remarkably, C. fornicata body mass did not decline during winter months; indeed, a relatively poorer body condition was associated with higher seawater temperature, higher air temperature and higher chlorophyll concentration. In a laboratory experiment, we found that C. fornicata that were starved for three weeks at 6 °C (local winter seawater temperature) showed no detectable declines in BMI compared to field collected individuals. Future studies should document energy budgets of sedentary marine animals at low winter seawater temperatures, and the impact of short-term elevated temperatures on those energy budgets.</span></p>
Data from: CRISPR/Cas9 knockout of shell matrix protein 1 in the slipper-snail Crepidula atrasolea
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Body mass index does not decline during winter for the sedentary marine gastropod Crepidula fornicata
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Spatial-temporal expression analysis of lineage-restricted shell matrix proteins in the slipper snail Crepidula atrasolea reveals shell field regionalization and distinct cell populations
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FIGURES 88–96, Crepidula depressa anatomy. Fig. 88 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 88–96, Crepidula depressa anatomy. Fig. 88: pallial cavity roof, detail of region of osphradium and anterior end of gill, ventral view. Fig. 89: head and haemocoel, ventral view, foot removed. Fig. 90: dorsal region of buccal mass, ventral view, odontophore removed, anterior esophagus sectioned longitudinally, inner surface exposed. Fig. 91: headfoot, male, dorsal view, pallial cavity and visceral mass removed. Fig. 92: digestive tubes as in situ, ventral view, topology of pallial oviduct also shown. Fig. 93: isolated visceral mass, male, ventral view, structures seen by transparency. Fig. 94: central nervous system, ventral view, adjacent portion of esophagus also shown, a single statocyst shown. Fig. 95: detail of female genital papilla, posterior view. Fig. 96: pallial oviduct as in situ, ventral view. Scale bars = 1 mm.
FIGURES 119–129 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 119–129, Type and voucher specimens of some Crepidula worthy for this study. Fig. 119–122: Crepidula aplysioides, one of four syntypes, BMNH 1977137 (length= 23 mm); Figs 119–121: ventral, dorsal and right views respectively; Fig. 122: detail of region of right side of septum insertion, showing large muscle scar (arrow). Figs. 123–125: Crepidula glauca voucher specimen (one of four) from Reeve (1859), BMNH 1829 (length= 20 mm), ventral, dorsal and left views respectively. Figs 126–129: Crepidula convexa voucher specimens; Figs. 126–127: specimen figured by Reeve (1859), BMNH 1829 (length= 10 mm), ventral and right views. Figs. 128–129: voucher of Hoagland (1977), ANSP 357830 (length= 11 mm), ventral and rightslightly oblique views.
FIGURE 118 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURE 118: Biogeographic mapping between obtained cladogram (right) and geographic occurrence of each studies species (left), showing a general evolutionary ascension from south to north of the ingroup species..
FIGURES 107–110, Crepidula carioca anatomy. Fig. 107 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 107–110, Crepidula carioca anatomy. Fig. 107: pallial cavity roof, detail of region of osphradium and anterior end of gill, ventral view. Fig. 108: headfoot, male, dorsal view, pallial cavity and visceral mass removed. Fig. 109: isolated visceral mass, male, ventral view, structures seen by transparency. Fig. 110: pallial oviduct as in situ, ventral view, topology of anus also shown. Scale bars = 1 mm.
FIGURES 97–101, Crepidula pyguaia anatomy. Fig. 97 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 97–101, Crepidula pyguaia anatomy. Fig. 97: headfoot, female, dorsal view, pallial cavity and visceral mass removed. Fig. 98: pallial cavity roof and visceral mass, dorsal view, headfoot removed. Fig. 99: visceral mass and pallial cavity separated from headfoot, ventral view, ventral portion of visceral mass (floor of pallial cavity) sectioned longitudinally at left (right in Fig.) and deflected, some portions of gill filaments partially removed, pallial roof exposed. Fig. 100: pallial cavity roof, detail of region of osphradium and anterior end of gill, ventral view. Fig. 101: pallial cavity roof, transversal section tangent to rectum. Scale bars = 2 mm.
FIGURES 83–87, Crepidula depressa anatomy. Fig. 83 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 83–87, Crepidula depressa anatomy. Fig. 83: whole view of a specimen removed from shell, female, dorsal view. Fig. 84: headfoot, female, dorsal view, pallial cavity and visceral mass removed. Fig. 85: pallial cavity roof, transversal section tangent to rectum. Fig. 86: visceral mass and pallial cavity separated from headfoot, ventral view. Fig. 87: same, ventral portion of visceral mass (floor of pallial cavity) sectioned longitudinally at left (right in Fig.) and deflected, some portions of gill filaments partially removed, pallial roof exposed. Scale bars = 2 mm.
FIGURES 79–82, Crepidula atrasolea anatomy. Fig. 79 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 79–82, Crepidula atrasolea anatomy. Fig. 79: headfoot, male, dorsal view, pallial cavity and visceral mass removed. Fig. 80: isolated visceral mass, male, ventral view, structures seen by transparency. Fig. 81: penis, ventral view. Fig. 82: pallial oviduct as in situ, ventral view. Scale bars = 0.5 mm.
FIGURES 73–78, Crepidula atrasolea anatomy. Fig. 73 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 73–78, Crepidula atrasolea anatomy. Fig. 73: pallial cavity roof, detail of region of osphradium and anterior end of gill, ventral view. Fig. 74: visceral mass portion encroaching in pallial roof, ventral view, ventral membrane of pericardium mostly removed, only a short portion of gill shown. Fig. 75: head and haemocoel, ventral view, foot removed. Fig. 76: isolated odontophore, ventral view. Fig. 77: visceral mass portion encroaching in pallial roof, ventral view, details of renal area, ventral membrane of pericardium removed, renal ventral wall sectioned longitudinally and deflected, inner structures exposed. Fig. 78: middle and distal digestive tubes, ventral view, seen as in situ, some adjacent structures also shown. Scale bars = 1 mm.
FIGURES 102–106, Crepidula pyguaia anatomy. Fig. 102 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 102–106, Crepidula pyguaia anatomy. Fig. 102: visceral mass portion encroaching in pallial roof, ventral view, ventral membrane of pericardium removed, renal ventral wall sectioned longitudinally and deflected, inner structures exposed. Fig. 103: head and haemocoel, ventral view, foot removed. Fig. 104: odontophore, ventral view, both cartilages deflected, left m5 deflected, radular ribbon removed and deflected downwards. Fig. 105: digestive tubes as in situ, ventral view, topology visceral mass shown. Fig. 106: pallial oviduct as in situ, ventral view, topology of anus also shown. Scale bars = 0.5 mm.
FIGURES 52–56, Crepidula plana anatomy. Fig. 52 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 52–56, Crepidula plana anatomy. Fig. 52: whole view of a specimen removed from shell, female, dorsal view. Fig. 53: headfoot, female, dorsal view, pallial cavity and visceral mass removed. Fig. 54: visceral mass and pallial cavity separated from headfoot, ventral view. Fig. 55: same, ventral portion of visceral mass (floor of pallial cavity) sectioned longitudinally at left (right in fig.) and deflected, some portions of gill filaments partially removed, pallial roof exposed. Fig. 56: pallial cavity roof, transversal section tangent to rectum. Scale bars = 2 mm.
FIGURES 57–62, Crepidula plana anatomy. Fig. 57 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 57–62, Crepidula plana anatomy. Fig. 57: pallial cavity roof, detail of region of osphradium and anterior end of gill, ventral view. Fig. 58: head and haemocoel, ventral view, foot removed. Fig. 59: visceral mass portion encroaching in pallial roof, ventral view, ventral membrane of pericardium mostly removed, only a short portion of gill shown. Fig. 60: isolated odontophore, dorsal view. Fig. 61: same, ventral view. Fig. 62: digestive tubes as in situ, ventral view, topology of pallial oviduct also shown, some inner gastric structures seen by transparency. Scale bars = 1 mm.
FIGURES 63–67, Crepidula plana anatomy. Fig. 63 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 63–67, Crepidula plana anatomy. Fig. 63: headfoot, male, dorsal view, pallial cavity and visceral mass removed. Fig. 64: visceral organs of male genital system, ventral view, seminal vesicle partially uncoiled, remainder as in situ. Fig. 65: isolated visceral mass, male, ventral view, structures seen by transparency. Fig. 66: pallial oviduct and adjacent structures, ventral view. Fig. 67: penis and some adjacent structures, ventral view. Scale bars = 1 mm.
FIGURES 38–44, Crepidula margarita anatomy. Fig. 38 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 38–44, Crepidula margarita anatomy. Fig. 38: visceral mass and pallial cavity separated from headfoot, ventral view. Fig. 39: same, ventral portion of visceral mass (floor of pallial cavity) sectioned longitudinally at left (right in Fig.) and deflected, some portions of gill filaments partially removed, pallial roof exposed. Fig. 40: pallial cavity roof, transversal section tangent to rectum. Fig. 41: visceral mass portion encroaching in pallial roof, ventral view, ventral membrane of pericardium mostly removed, only a short portion of gill shown. Fig. 42: head and haemocoel, ventral view, foot removed. Fig. 43: foregut, ventralslightly left view, nerve ring shown as in situ. Fig. 44: dorsal portion of buccal mass, ventral view, odontophore removed, anterior esophagus partially sectioned longitudinally and part deflected. Scale bars = 1 mm.
FIGURES 45–51, Crepidula margarita anatomy. Fig. 45 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 45–51, Crepidula margarita anatomy. Fig. 45: isolated odontophore, ventral view. Fig. 46: same, dorsal view. Fig. 47: same, ventral view, superficial membrane removed, some muscles sectioned transversally, insertion of some muscles shown by transparency. Fig. 48: same, dorsal view. Fig. 49: odontophore, ventral view, subradular membrane removed, both cartilages strongly deflected, right m4 and m5 deflected. Fig.50: pallial oviduct and adjacent structures, ventral view. Fig. 51: digestive tubes as in situ, ventral view, topology of pallial oviduct also shown. Scale bars= 0.5 mm.
FIGURES 35–37, Crepidula margarita anatomy. Fig. 35 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 35–37, Crepidula margarita anatomy. Fig. 35: whole view of a specimen removed from shell, female, dorsal view. Fig. 36: head:foot, female, dorsal view, pallial cavity and visceral mass removed. Fig. 37: pallial cavity roof, detail of region of osphradium and anterior end of gill, ventral view. Scale bars = 1 mm.
FIGURES 26–34 in Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil
FIGURES 26–34, Radulae in SEM: Figs.26–27: Crepidula margarita. Figs. 28–29: C. plana. Figs.30–31: C. atrasolea. Fig. 32: C. depressa. Scale bars = 30 "m, except Fig. 11 = 20 "m. Fig. 33: C. carioca. Fig.34: C. pyguaia.
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