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65 results for “Horseshoe Crabs”
FIGURE 6. Non-xiphosurid euarthropods from the Strelovec Formation. A, E in Revisiting horseshoe crab fossils from the Middle Triassic (Anisian) Strelovec Formation Konservat-Lagerstätte of Slovenia
FIGURE 6. Non-xiphosurid euarthropods from the Strelovec Formation. A, E: Aeger sp. A: PMSL T-1270. E: PMSL T- 1238 showing exceptional appendage detail. B: An as-of-yet undescribed thylacocephalan. PMSL T-1742. C, D: Exceptionally well-preserved indeterminate decapod crustaceans. C: PMSL T-1262 showing appendage segmentation and ocular structures. D: PMSL T-1263. F: Schimperella sp. PMSL T-1236. Image credit: Jure Žalohar.
FIGURE 4 in Revisiting horseshoe crab fossils from the Middle Triassic (Anisian) Strelovec Formation Konservat-Lagerstätte of Slovenia
FIGURE 4. Additional xiphosurids with genal spine indentations. Arrows indicate the structure on all taxa. A: Franconiolimulus pochankei from the Bayreuth Formation, (Early Jurassic, Hettangian) Pechgraben, Germany. SSN 8PG35, holotype. B, C: Panduralimulus babcocki from the Maybelle Limestone, Lueders Formation (Permian, Cisuralian, Kungurian), Texas, USA. B: USNM 520723, holotype. C: USNM 520724, paratype. D: Tasmaniolimulus patersoni from the Jackey Shale (Permian, Lopingian), Tasmania, Australia. UTGD 123979, holotype. E: Dubbolimulus peetae from the Ballimore Formation (Middle Triassic, Ladinian), New South Wales, Australia. MMF 27693, holotype. D coated in ammonium chloride sublimate. D and E converted to greyscale. Image credit: A: Andreas Hecker; B–D: Russell Bicknell; E: David Barnes.
FIGURE 3 in Revisiting horseshoe crab fossils from the Middle Triassic (Anisian) Strelovec Formation Konservat-Lagerstätte of Slovenia
FIGURE 3. New material referred to Sloveniolimulus rudkini. A, B, E: PMSL T-2071. A: Specimen showing prosomal doublure and possible occipital lobe on left genal spine. B: Interpretative drawing of PMSL T-2071. E: Close up of phosphatized spheres in A. C, D: PMSL T-2072. C: Specimen showing injured right genal spine and hypertrophied left genal spine. D: Interpretative drawing of PMSL T-2072. Specimens from the Western slopes of the Kalška gora Mountain, within the Kamniška Bistrica Valley. B and D colour coded for main body sections. A and C coated in ammonium chloride sublimate. All images converted to greyscale. Abbreviations: Car: cardiac lobe; In: genal spine indentation; Oc: possible occipital lobe; Pro: prosoma; Thr: thoracetron. Image credit: A, C: Russell Bicknell; E: Tomaž Hitij.
FIGURE 2 in Revisiting horseshoe crab fossils from the Middle Triassic (Anisian) Strelovec Formation Konservat-Lagerstätte of Slovenia
FIGURE 2. Holotype of Sloveniolimulus rudkini. A: PMSL T-993. B: Interpretative drawing of PMSL T-993, colour coded for main body sections. Specimen from the Section S1 of the Slatinski Plaz, Robanov Kot Valley. A coated in ammonium chloride sublimate and images converted to greyscale. Abbreviations: Car: cardiac lobe; Fla: thoracetronic flange; In: genal spine indentation; Med: medial thoracetronic lobe; Oph: ophthalmic ridge; PDub: prosomal doublure; Pro: prosoma; TDub: thoracetronic doublure; Thr: thoracetron; Tel: telson; Tk: telson keel. Image credit: Russell Bicknell.
Figure 3 in Influence of environmental variability on the body condition of the mangrove horseshoe crab Carcinoscorpius rotundicauda from Banyuasin Estuarine, South Sumatra, Indonesia
Figure 3. The relative condition factor (Kn) of C. rotundicauda from Banyuasin Estuary Waters. There was a significant difference between Kn values for males and females at a significant level of 0.05.
Figure 2 in Influence of environmental variability on the body condition of the mangrove horseshoe crab Carcinoscorpius rotundicauda from Banyuasin Estuarine, South Sumatra, Indonesia
Figure 2. The prosoma width-weight relationship of C. rotundicauda from Banyuasin Estuary Waters. There was a different growth pattern for both sexes where males indicated negative allometric and females indicated isometric.
Chromosome-level genome assembly of a living fossil, the Atlantic Horseshoe Crab Limulus polyphemus
<p>Associated data for male Atlantic horseshoe crab <em>Limulus polyphemus </em>chromosome-scale genome and annotations, including genome (FASTA), structural gene annotations (GFF3), functional annotations (TSV), coding sequences (CDS), protein sequences (PEP), RepeatModeler library (FA.CLASSIFIED), and repeat annotations (OUT).</p> <p>qaLimPoly3.1 - Publication analyses were completed with this genome. </p> <p>qaLimPoly3.3 - This is the current reference assembly. Assembly updated with Sanger sequencing based edits of Chr11 and removal of adapter contamination. Gene annotations updated with curation of canonical proclotting genes. Repeat annotations updated with curation of repeat elements ltr-1_family-1, ltr-1_family-4, and ltr-1_family-26. </p> <p>HSC_Genomic_FacC_860F_PREMIX_CNNJ42_1.ab1 and HSC_Genomic_FacC_1544R_PREMIX_CNNJ43_2.ab1 are Sanger sequenced PCR products for Lp_g42129 (Factor C) from primers FacC_860F.fasta and FacC_1544R.fasta.</p>
Fig. 4. A. Synziphosurine horseshoe crab Pasternakevia podolica, specimen ISEA I−F in Silurian synziphosurine horseshoe crab Pasternakevia revisited
Fig. 4. A. Synziphosurine horseshoe crab Pasternakevia podolica, specimen ISEA I−F/MP/3/1499/08 (A1) and reconstruction (A2). B. Slab comprising a counterpart ISEA I−F/MP/1/1499/08 and a carcinoid, Baltoeurypterus tetragonophthalmus (B1); part of specimen WNoZ/S/3/40 (B2) and counterpart ISEA I−F/MP/1/1499/08 (B3); reconstruction (B4). Scale bars 10 mm.
Fig. 5 in Silurian synziphosurine horseshoe crab Pasternakevia revisited
Fig. 5. Comparison of pleurae in synziphosurine horseshoe crab specimen ISEA I−F/MP/3/1499/08 (A) and specimen ISEA I−F/MP/2a/1499/08 (B). Arrows indicate borders between basal and distal portion of pleura and the position where "pseudofurrows" may arise (further explanation in text). Out of scale.
Fig. 3 in Silurian synziphosurine horseshoe crab Pasternakevia revisited
Fig. 3. Synziphosurine horseshoe crab Pasternakevia podolica Selden and Drygant, 1987. Specimen ISEA I−F/MP/2a/1499/08: part (A) and counterpart ISEA I−F/MP/2b/1499/08 (B), reconstruction (C), front of carapace (D), region of microtergite, m indicates microtergite (E), base of telson, s indicates structure within tergite 10 (F), plausible original position of the animal preserved, only carapace and tergites shown (G).
Fig. 1 in Silurian synziphosurine horseshoe crab Pasternakevia revisited
Fig. 1. Synziphosurine Pasternakevia podolica Selden and Drygant, 1987; reconstruction of holotype (redrawn after Selden and Drygant 1987: fig. 3d; changed).
Figure 3 in The morphometric variability of the mangrove horseshoe crab (Carcinoscorpius rotundicauda) from Banyuasin estuarine of South Sumatra, Indonesia
Figure 3. The size distribution of Carcinoscorpius rotundicauda. Females were greater in size than males for each measurement of prosoma width (A), carapace length (B), telson length (C) and total length (D).
Figure 6 in The morphometric variability of the mangrove horseshoe crab (Carcinoscorpius rotundicauda) from Banyuasin estuarine of South Sumatra, Indonesia
Figure 6. Prosoma width-total length (left) and telson length-total length (right) relationship of males and females Carcinoscorpius rotundicauda from Banyuasin estuarine of South Sumatra, Indonesia. The telson length or prosoma width grew slowly with respect to the total length (negative allometric, b <1, p <0.05) for both sexes.
Figure 2 in The morphometric variability of the mangrove horseshoe crab (Carcinoscorpius rotundicauda) from Banyuasin estuarine of South Sumatra, Indonesia
Figure 2. The morphometric measurement of the horseshoe crab; total length (TL), telson length (TEL), prosoma width (PW), and carapace length (CL). The measurement was recorded to 1 mm accuracy.
Figure 5 in The morphometric variability of the mangrove horseshoe crab (Carcinoscorpius rotundicauda) from Banyuasin estuarine of South Sumatra, Indonesia
Figure 5. Carapace length-body weight (left) and prosoma width-carapace length (right) relationship of males and females Carcinoscorpius rotundicauda from Banyuasin estuarine of South Sumatra, Indonesia. The body weight grew slowly with respect to the carapace length (negative allometric, b <3, p <0.05) for both sexes while the carapace length and prosoma width grown at the same rate (isometric, b = 1, p <0.05).
Figure 4 in The morphometric variability of the mangrove horseshoe crab (Carcinoscorpius rotundicauda) from Banyuasin estuarine of South Sumatra, Indonesia
Figure 4. Total length-body weight (left) and prosoma width-body weight (right) relationship of males and females Carcinoscorpius rotundicauda from Banyuasin estuarine of South Sumatra, Indonesia. Both sex indicated the body weight grown slowly with respect to the total length (negative allometric, b <3, p <0.05) while the body weight of females also grown slowly with respect to the prosoma width (negative allometric, b <3, p <0.05) but the prosoma width and body weight for males grown at the same rate (isometric, b = 3, p <0.05).
Figure 1 in The morphometric variability of the mangrove horseshoe crab (Carcinoscorpius rotundicauda) from Banyuasin estuarine of South Sumatra, Indonesia
Figure 1. The sampling sites map in Banyuasin Estuarine of South Sumatra, Indonesia (Fauziyah et al. 2019).
Figure 3 in The first investigation record of threatened horseshoe crabs in the Banyuasin estuarine, South Sumatra, Indonesia
Figure 3. The geographic distribution map of horseshoe crabs in Banyuasin Estuarine, South Sumatra, Indonesia.
Figure 2 in The first investigation record of threatened horseshoe crabs in the Banyuasin estuarine, South Sumatra, Indonesia
Figure 2. Carcinoscorpius rotundicauda from Banyuasin Estuarine Waters, South Sumatra, Indonesia. This species is smaller than the others and the only species where the telson cross-section is rounded. Female has a chelate clasper like scissors (red oval) while the male has a hemichelate clasper like hooks on the first and second walking legs (yellow oval).
Figure 1 in The first investigation record of threatened horseshoe crabs in the Banyuasin estuarine, South Sumatra, Indonesia
Figure 1. Tachypleus gigas from Banyuasin Estuarine Waters, South Sumatra, Indonesia. This species has a triangular telson shape and only one spine (yellow arrow) on the rear part of the opisthosoma. Female has a chelate clasper like scissors (red oval) while the male has a hemichelate clasper like hooks on the first and second walking legs (yellow oval).
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