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47 results for “Megalomma”
FIGURE 24 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 24. Megalomma splendidum (Moore, 1905). A) Body, anterior end, ventro-lateral view; B) anterior end, dorsal view; C) same, lateral view; D) collar, ventral view showing the parallel lamellae as indicated with arrows; E) thoracic torus and chaetigers; F) thoracic chaetigers; G–H) eyes from dorsalmost radioles; I) eye from 2nd dorsalmost radiole; J) abdominal chaetiger. A–J) Specimens from British Columbia, Canada, LACM, 003466. Abbreviation: apr anterior peristomial ring. Scale bars: A–B) 2 mm; C–F) 1 mm; G–J) 0.5 mm.
FIGURE 34 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 34. Simplified neighbour-joining tree of COI sequences included in this study using K2P distances.
FIGURE 23. Megalomma pigmentum Reish, 1963. A, H in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 23. Megalomma pigmentum Reish, 1963. A, H) Thorax, dorsal views; B) thorax, lateral view; C–D, G) thorax, ventral views; E) dorsal and ventral lips; F) dorsalmost radiolar eye; I) thoracic uncini and companion chaeta; J) spermatozoon; K) abdominal uncinus; L) inferior thoracic chaetae type C; M–N) superior narrowly hooded thoracic chaetae; O) last abdominal chaetiger, nephridia and sperm tissue in grey. A–O) Specimens from San Quintín, México. Abbreviations: apr anterior peristomial ring, ca caruncle, dl dorsal lip, fl flange, vl ventral lip, vs ventral sacs, vsc ventral shield of collar. Scale bars: A–D, G–H: 1 mm; E: 0.5 mm; F: 0.25 mm; I, K–O: 40 µm; J: not scaled.
FIGURE 22. Megalomma pigmentum Reish, 1963. A in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 22. Megalomma pigmentum Reish, 1963. A) Anterior end, dorsal view; B) same, ventral view; C) same, lateral view; D) tube; E) collar, dorsal view; F) same, ventral view; G) same, lateral view; H) dorsalmost radiolar eye; I) lateral radiole; J–K) posterior abdomen. A–K) Specimens from Bahia San Quintín, México, ECOSUR. Ventral flanges in B–C, F as indicated with arrows. Scale bars: A–D) 1 mm, E–G, J–K) 0.5 mm, H–I) 0.2 mm.
FIGURE 14. Megalomma heterops Perkins, 1984. A in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 14. Megalomma heterops Perkins, 1984. A) Tube from posterior abdomen; B, E–F) thorax, dorsal view; C) same, ventral view; D) same, lateral view; G) dorsal lip; H) dorsalmost radiolar eye; I) eye from a dorsal radiole; J–K) eyes from lateral radioles; K) eye from a ventral radiole. A, D) holotype from Florida, USNM, 54721; B–C, E–H) paratype from Florida, USNM, 67953; I–L) specimen from Cozumel, México, ECOSUR. Abbreviations: dl dorsal lip; vsc ventral shield of collar. Scale bars: A) 1 mm; B–G) 0.5 mm; H) 0.2 mm; I–L) 0.3 mm.
FIGURE 21 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 21. Megalomma perkinsi Tovar-Hernández and Salazar-Vallejo, 2006. A) Thorax, dorsal view; B) same, lateral view; C) same, ventral view; D) dorsal lips; E) dorsalmost radiolar eye; F) eye from a lateral radiole; G) eye from a ventral radiole. A–G) Holotype from North Carolina, USNM, 53976. Abbreviations: dl dorsal lip; vl ventral lip. Scale bars: A–C) 1 mm; D) 0.5 mm; E–G) 0.3 mm.
FIGURE 15 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 15. Megalomma lanigera (Grube, 1846). A, D) Thorax, dorsal view; B) collar, dorsal view; C) collar, ventral view; E) thorax, ventral view; F) ventral and dorsal lip; G) dorsalmost radiolar eye, spherical; H) spiraled eye from a dorsal radiole; I) oval eye from a lateral radiole; J) spherical eye from a ventral radiole. A–C, G–J) Specimens from the Aegean Sea, USNM, 97444; D–F) specimen from Naples, MCZ, 1517. Abbreviations: dl dorsal lip; vl ventral lip. Scale bars: A–F) 2 mm; G–J) 0.25 mm.
FIGURE 17 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 17. Megalomma modestum (de Quatrefages, 1866). A, D) Thorax, dorsal views; B, E) thorax, ventral views; C) thorax, lateral view; F) dorsalmost radiolar eye. A–C, F) Specimen from Balboa, Panamá, ECOSUR; D–E) syntype from Perú, MNHN, 163. Scale bars: A–E) 1 mm; F) 0.3 mm.
FIGURE 19 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 19. Megalomma pacifici (Grube, 1859). A–B) Thorax, dorsal views; C) thorax, ventral view; D) dorsalmost radiolar eye; E) eye from 5th dorsal radiole; F) eye from a lateral radiole; G) ventralmost radiolar eye; H) thoracic chaetae; I) thoracic uncini and companion chaetae; J) abdominal uncini; K) abdominal chaetae. A–K) Specimen from Costa Rica, ECOSUR. Scale bars: A–C) 2 mm; D–G) 0.25 mm; H) 50 µm; I–J) 10 µm; K) 40 µm.
FIGURE 12 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 12. Megalomma gesae Knight-Jones, 1997. A) Collar and keel as indicated with arrow; B) thorax, dorsolateral view; C) ventral sacs as indicated with arrow; D) dorsalmost radiolar eye; E) posterior abdomen and pygidium. A–E) Specimen from Balboa, Panama, ECOSUR. Abbreviations: apr anterior peristomial ring. Scale bars: A–C, E) 1 mm; D) 0.3 mm.
FIGURE 11 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 11. Megalomma fauchaldi Giangrande et al. 2007. A) Thorax, dorsal view; B) same, lateral view; C) same, ventral view; D) dorsalmost radiolar eye; E–G) eyes from lateral radioles. A–G) Specimen from Galeta Reef, Panama, USNM, 066403. Abbreviations: dlc dorsal lappets. Scale bars: A–C) 0.5 mm, D–G) 0.3 mm.
FIGURE 9 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 9. Megalomma coloratum (Chamberlin, 1919). A) Body, lateral view; B) branchial crown, dorsal view; C) thorax, dorsal view; D) dorsal and ventral lips; E) peristomium, frontal view; F) oocytes; G) abdominal uncinus; H–I) thorax, ventral views; J) superior thoracic narrowly hooded chaeta; K) inferior thoracic chaeta type C; L–M) abdominal broadly hooded chaetae; N) dorsalmost radiolar eyes; O–P) eyes from from 5th dorsal radiole in adult and juvenile stages, respectively; Q) ventral radiole; R–S) thoracic uncini and companion chaetae. A–S) Specimens from Mazatlán, México, ECOSUR. Abbreviations: bls basal lateral skeleton; d dorsum; dl dorsal lip; ep epithelium; no nuchal organ; rs radiolar skeleton; v ventrum; vl ventral lip. Scale bars: A–E, H–I) 1 mm; F) 15 µm; G, J–M, R–S) 20 µm; N) 125 µm.
FIGURE 7 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 7. Megalomma coloratum (Chamberlin, 1919). A) Body, lateral view; B) thorax, lateral view; C) glandular ridge on chaetiger 3 as indicated with arrow; D) thorax, ventral view; E) branchial crown and thorax, dorsal view; F) ventralmost radiole; G) dorsalmost radiolar eye; H) eye from 5th dorsal radiole; I) abdominal tori; J–L) pygidiums. A–L) Specimens from Mazatlán, México, ECOSUR. Scale bars: A, E) 10 mm; B–D) 3 mm; F–H) 0.3 mm; I–L) 3 mm.
FIGURE 5 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 5. Megalomma bioculatum (Ehlers, 1887) and M. claparedei (Gravier, 1908). A, I) Thorax, dorsal views; B–C, H) thorax, ventral views; D, P) thoracic uncini; E–F, N) companion chaetae; G) inferior thoracic chaeta type B; J) dorsalmost radiolar eye; K) abdominal uncinus; L) superior thoracic narrowly hooded chaeta; M) abdominal broadly hooded chaeta; O) inferior thoracic chaeta type B. A–G) Megalomma bioculatum; H–P) Megalomma claparedei. A) Specimen from Florida, MCZ, 47066; B–G) modified from Perkins, 1984; H–I) syntype from Djibouti, MNHN 559; J–P) modified from Gravier, 1908. Abbreviations: apr anterior peristomial ring; dl dorsal lip; dp dorsal pockets; vsc ventral shield of collar. Scale bars: A) 1 mm; H–I) 0.5 mm; B–G, J–P) not scaled.
FIGURE 4 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 4. Megalomma circumspectum (Moore, 1923). A) Thorax, dorsal view; B) same, ventral view; C) same, lateral view; D) ventral sacs as indicated with arrows, branchial crown removed; E) posterior end; F) eyes from dorsal radioles; G) dorsalmost radiolar eye; H) eye from 2nd dorsal radiole; I) eye from a lateral radiole; J) ventralmost ocular spot. A–J) Specimens from La Paz, México, ECOSUR. Scale bars: A–C, E) 1 mm; D) 0.5 mm; F) 2 mm; G–J) 0.3 mm.
FIGURE 1 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 1. Variations on dorsal margins of collar and inferior thoracic chaetae in Megalomma. A–C) Margins fused to faecal groove; D) margins not fused to faecal groove; E) chaeta type A; F) chaeta type B; G) chaeta type C. A–D) Schematized; E–G) modified from Fitzhugh (1989). Abbreviations: dlc dorsal lappets; fg faecal groove. The partial exposition of the anterior peristomial ring is marked in gray.
FIGURE 2 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 2. Megalomma acrophthalmos (Grube, 1878). A) Thorax, dorsal view; B) thorax, ventral view; C) collar and anterior segments, ventral view; D) peristomium, frontal view; E) thoracic chaetigers; F) dorsal and ventral lips; G) collar and anterior segments, dorsal view; H–I) inferior thoracic chaetae type B; J) dorsalmost radiolar eye; K) eye from a lateral radiole; L) eye from a ventral radiole. A–L) Specimens from Philippines, USNM, 38683. Abbreviations: apr anterior peristomial ring; ca caruncle; d dorsum; dl dorsal lip; dlc dorsal lappets of collar; nl notopodial lobe; v ventrum; vl ventral lobe; vs ventral sacs; vsc ventral shield of collar. Scale bars: A–D, G) 1 mm; E) 0.5 mm; F) 1 mm; H–I) 50 µm; J–L) 0.3 mm.
FIGURE 31 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 31. Strict consensus tree of 26 MPT.
FIGURE 26. Megalomma georgiense n in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 26. Megalomma georgiense n. sp. A) Thorax, dorsal view; B–C) same, ventral views; D) dorsalmost radiolar eye; F) eye and spot of a lateral radiole; G) eye and spot of a ventral radiole; H) thoracic paleate chaetae; I) thoracic narrowly hooded chaetae; J) abdominal parapodium; K) thoracic uncini; L) abdominal uncini. A–B, D–L) Holotype from Georgia, USNM, 061328; C) paratype, USNM, 061328. Scale bars: A–C) 1 mm; D–F) 0.3 mm; H–L) 0.02 mm.
FIGURE 20 in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861
FIGURE 20. Selected structures of Megalomma pacifici (Grube, 1859). A) Tube; B) thorax, dorsal view; C, F) thorax, ventral views; D–E) thorax, lateral views; G) posterior abdomen; H) collar dorsal view; I) pygidium; J) dorsalmost radiolar eye. A–D, I–J) Megalomma pacifici (Grube, 1859); E–H) Pseudopotamilla panamica Chamberlin, 1919, MCZ, 72. A–D, J) Holotype from Costa Rica, ZMUC POL 1985; E–H) holotype from Panama, MCZ, 72; I) specimen from Costa Rica, ECOSUR. Scale bars: A: 5 mm; B–D: 3 mm; E–H: 2 mm; I–J: 0.25 mm.
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