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12 results for “Brachyrhamdia”
Figure 1 in Pectoral-fin glands and delivery apparatus in the catfish genus Brachyrhamdia Myers, 1927 (Siluriformes: Heptapteridae)
Figure 1: Ventral view of the pectoral region of Brachyrhamdia species, exposed in situ axillary glands after the removal of skin, hypaxial musculature and loose connective tissue and adipose tissue. (A) Brachyrhamdia marthae, LIRP 10040, 31.4 mm SL. Both left and right axillary glands (arrow) are exposed, right gland limits highlighted by white dashed line. (B) Brachyrhamdia heteropleura, LIRP 7419, 33.4 mm SL. Right axillary gland is exposed (arrow), with its limits highlighted by white dashed line, and portion of left axillary gland can be seen near pectoral-fin base by transparency. Scale bar: 1 mm.
Figure 3 in Pectoral-fin glands and delivery apparatus in the catfish genus Brachyrhamdia Myers, 1927 (Siluriformes: Heptapteridae)
Figure 3. (A₁) Dorsal view of Brachyrhamdia marthae right pectoral-fin spine and girdle, USNM 305641, total spine length 5.8 mm; (A₂) Illustration of B. marthae right pectoral-fin spine in dorsal view. Black indicates the ossified portion of spine, while gray portion indicates the unossified spurious ray; (B₁) Dorsal view of B. heteropleura right pectoral-fin spine and girdle, USNM 226105, total spine length 4.6 mm; (B₂) Illustration of B. heteropleura right pectoral-fin spine in dorsal view. Black indicates the ossified portion of the spine, while the gray portion indicates the unossified spurious ray (completed according to left pectoral-fin spine). The proximal portion of spine cannot be observed when the spine is articulated, therefore illustrations of such portion were produced according to direct observation. Abbreviations: ad = anterior denticulation, clth = cleithrum, pcp = posterior cleithrum process, ps = posterior serration.
Figure 2 in Pectoral-fin glands and delivery apparatus in the catfish genus Brachyrhamdia Myers, 1927 (Siluriformes: Heptapteridae)
Figure 2. Longitudinal oblique section of B. heteropleura left pectoral fin girdle, LIRP 7419, 30.9 mm SL, indicating gland cells wrapped by connective tissue. Abbreviations: agc = axillary gland cells (including binucleated cells), musc = musculature, clth = cleithrum. Scale bar: 0.5 mm.
Figure 4 in Pectoral-fin glands and delivery apparatus in the catfish genus Brachyrhamdia Myers, 1927 (Siluriformes: Heptapteridae)
Figure 4: Histological preparations of the right pectoral-fin spine of Brachyrhamdia species, indicating gland cells between bony spine and epidermis. (A) B. marthae, LIRP 10040, 23.9 mm SL, transversal section: (A₁) General view of spine (A₂) Detail of posterior edge of spine. (B) B. heteropleura, LIRP 7419, 30.9 mm SL, oblique transversal section: (B₁) General view of spine; (B₂) Detail of posterior edge of spine. Abbreviations: ad = anterior denticulation, ep = epidermis, ps = posterior serration, sp = pectoral-fin spine, vgc = superficial pectoral-fin spine venom gland cells. Epidermal cells indicated in B. heteropleura morphologically resemble club cells. Scale bar: 0.05 mm.
FIGURE 7 in A new Brachyrhamdia (Siluriformes: Heptapteridae) from Rio Japurá basin, Brazil, with comments on its phylogenetic affinities, biogeography and mimicry in the genus
FIGURE 7. Right pectoral spines of Brachyrhamdia species, dorsal view: A—Brachyrhamdia heteropleura, USNM 226105, 32.5 mm SL; B—Brachyrhamdia imitator, MCP 15132, 34.7 mm SL; C—Brachyrhamdia marthae, USNM 305631, 26.5 mm SL; D—Brachyrhamdia rambarrani, INPA 9188, 47.3 mm SL. Scale bars—1 mm.
FIGURE 8. Brachyrhamdia rambarrani, USNM 204694, 53.1 in A new Brachyrhamdia (Siluriformes: Heptapteridae) from Rio Japurá basin, Brazil, with comments on its phylogenetic affinities, biogeography and mimicry in the genus
FIGURE 8. Brachyrhamdia rambarrani, USNM 204694, 53.1 mm SL, paratype of Pimelodella rambarrani, Brazil, Amazonas, Rio Unini (Rio Negro basin). Photo by Vitor Masson.
FIGURE 5 in A new Brachyrhamdia (Siluriformes: Heptapteridae) from Rio Japurá basin, Brazil, with comments on its phylogenetic affinities, biogeography and mimicry in the genus
FIGURE 5. Caudal skeleton of Brachyrhamdia thayeria, LIRP 10237, 55.2 mm SL, paratype. Abbreviations: cf—caudal artery foramen; ep—epural; ha+has—complex hypurapophysis composed of hypurapophysis and secondary hypurapophysis; hu1+hu2—complex ventral plate formed by co-ossification of hypurals 1 and 2; hu3+hu4—complex dorsal plate formed by coossification of hypurals 3 and 4; hu5—hypural 5; ph—parhypural; pu1+u1—complex centrum composed of preural centrum 1 and ural centrum 1; pu2—preural centrum 2; and ur—uroneural. Scale bar—1 mm.
FIGURE 4 in A new Brachyrhamdia (Siluriformes: Heptapteridae) from Rio Japurá basin, Brazil, with comments on its phylogenetic affinities, biogeography and mimicry in the genus
FIGURE 4. Right pectoral spine of Brachyrhamdia thayeria, dorsal view, LIRP 10237, 55.2 mm SL, paratype. Scale bar—1 mm.
FIGURE 3 in A new Brachyrhamdia (Siluriformes: Heptapteridae) from Rio Japurá basin, Brazil, with comments on its phylogenetic affinities, biogeography and mimicry in the genus
FIGURE 3. Branchial arches of Brachyrhamdia thayeria, dorsal view, LIRP 10237, 55.2 mm SL, paratype. Gill rakers and dorsal elements of left gill arches not shown. Abbreviations: ac4—accessory element of ceratobranchial 4; cn—cartilaginous nodule; bb2–4—basibranchials 2 to 4; cb1–5—ceratobranchials 1 to 5; eb1–4—epibranchials 1 to 4; hb1–3—hypobranchials 1 to 3; pb1—pharyngobranchial 1; pb3–4—pharyngobranchials 3 and 4; tp—tooth plate; and up—uncinate process. Scale bar—1 mm.
FIGURE 2 in A new Brachyrhamdia (Siluriformes: Heptapteridae) from Rio Japurá basin, Brazil, with comments on its phylogenetic affinities, biogeography and mimicry in the genus
FIGURE 2. Cranium of Brachyrhamdia thayeria, dorsal view, LIRP 10237, 55.2 mm SL, paratype. Abbreviations: afanterior fontanel; an—antorbital; ap—autopalatine; at—antorbital tubule; ec, ethmoidean cartilage; ep—epioccipital; esextrascapula; ex—exoccipital; fr—frontal; i1–6—infraorbital sensory branches 1 to 6; le—lateral ethmoid; me—mesethmoid; mx—maxilla; na—nasal; pf—posterior fontanel; pre—premaxilla; po1+pm11—postotic–preoperculomandibular complex sensory branch (postotic sensory branch 1+ preoperculomandibular sensory branch 11); po2—postotic sensory branch 2; ptpterotic; s1–4—supraorbital sensory branches 1 to 4; s6—supraorbital sensory branch 6 (epiphyseal branch); s7—supraorbital sensory branch 7 (postorbital branch); s8—supraorbital sensory branch 8 (parietal branch); sp—sphenotic; st1–4—suborbital tubules 1 to 4; soc—supraoccipital; socp—supraoccipital process. Scale bar—2 mm.
FIGURE 1. Brachyrhamdia thayeria, INPA 39534, 50.7 in A new Brachyrhamdia (Siluriformes: Heptapteridae) from Rio Japurá basin, Brazil, with comments on its phylogenetic affinities, biogeography and mimicry in the genus
FIGURE 1. Brachyrhamdia thayeria, INPA 39534, 50.7 mm SL, holotype, Brazil, Amazonas, Maraã, Lago Amanã, Rio Japurá basin.
FIGURE 6 in A new Brachyrhamdia (Siluriformes: Heptapteridae) from Rio Japurá basin, Brazil, with comments on its phylogenetic affinities, biogeography and mimicry in the genus
FIGURE 6. Map of northern South America, showing distribution of Brachyrhamdia thayeria.
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