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20 results for “Macrorhynchia”
Data from: Population differentiation or species formation across the Indian and the Pacific Oceans? An example from the brooding marine hydrozoan Macrorhynchia phoenicea
Assessing population connectivity is necessary to construct effective marine protected areas. This connectivity depends, among other parameters, inherently on species dispersal capacities. Isolation by distance (IBD) is one of the main modes of differentiation in marine species, above all in species presenting low dispersal abilities. This study reports the genetic structuring in the tropical hydrozoan Macrorhynchia phoenicea α (sensu Postaire et al., 2016a), a brooding species, from 30 sampling sites in the Western Indian Ocean and the Tropical Southwestern Pacific, using 15 microsatellite loci. At the local scale, genet dispersal relied on asexual propagation at short distance, which was not found at larger scales. Considering one representative per clone, significant positive FIS values (from −0.327*** to 0.411***) were found within almost all sites. Gene flow was extremely low at all spatial scales, among sites within islands (<10 km distance) and among islands (100 to >11,000 km distance), with significant pairwise FST values (from 0.035*** to 0.645***). A general pattern of IBD was found at the Indo-Pacific scale, but also within ecoregions in the Western Indian Ocean province. Clustering and network analyses identified each island as a potential independent population, while analysis of molecular variance indicated that population genetic differentiation was significant at small (within island) and intermediate (among islands within province) spatial scales. As shown by this species, a brooding life cycle might be corollary of the high population differentiation found in some coastal marine species, thwarting regular dispersal at distances more than a few kilometers and probably leading to high cryptic diversity, each island housing independent evolutionary lineages.
FIGURE 7. Macrorhynchia whiteleggei. A, hydrocladial internodes. B, hydrotheca. C in New species, new records and redescriptions of Thecate hydroids (Cnidaria: Hydrozoa: Leptothecata) from Southern Australia
FIGURE 7. Macrorhynchia whiteleggei. A, hydrocladial internodes. B, hydrotheca. C, mature gonothecae, D, nematothecae on phylactocarp. Scale bar: A, B, D, 0.5 mm, C, 1 mm.
FIGURE 6. Macrorhynchia whiteleggei. Colony approximately 15 in New species, new records and redescriptions of Thecate hydroids (Cnidaria: Hydrozoa: Leptothecata) from Southern Australia
FIGURE 6. Macrorhynchia whiteleggei. Colony approximately 15 cm high, in situ photograph, Popes Eye reef, southern Port Phillip, depth 12 m, September 2008.
FIGURE 5. Macrorhynchia mulderi. A, hydrocladial internodes. B, C in New species, new records and redescriptions of Thecate hydroids (Cnidaria: Hydrozoa: Leptothecata) from Southern Australia
FIGURE 5. Macrorhynchia mulderi. A, hydrocladial internodes. B, C, hydrothecae, lateral views. D, hydrotheca, anterior frontal view, median nematotheca not drawn. Scale bar: A, 0.3 mm, B–D, 0.2 mm.
FIGURE 11 in Periclimenes macrorhynchia sp. nov., a new hydrozoan-associated pontoniine shrimp (Crustacea, Decapoda, Palaemonidae) from North East Kalimantan, Indonesia
FIGURE 11. Periclimenes batei (Borradaile, 1917) RMNH.CRUS.D.57200. Juvenile specimen, pocl. 1.04 mm: a, left third pereiopod; b, idem, dactylus and distal part propodus. Adult male specimen, pocl. 2.0 mm: c, right third pereiopod; d, idem, propodus and dactylus; e, idem, dactylus and distal part propodus. Scale a, d = 0.4 mm; b, e = 0.1 mm; c = 1 mm.
FIGURE 8 in Periclimenes macrorhynchia sp. nov., a new hydrozoan-associated pontoniine shrimp (Crustacea, Decapoda, Palaemonidae) from North East Kalimantan, Indonesia
FIGURE 8. Periclimenes macrorhynchia sp. nov., ovigerous female paratype (RMNH.CRUS.D. 57199): a, right first pleopod. Male allotype (RMNH.CRUS.D.57198): b, left first pleopod; c, left second pleopod. Scale a = 1 mm; b, c = 0.4 mm.
FIGURE 5 in Periclimenes macrorhynchia sp. nov., a new hydrozoan-associated pontoniine shrimp (Crustacea, Decapoda, Palaemonidae) from North East Kalimantan, Indonesia
FIGURE 5. Periclimenes macrorhynchia sp. nov., ovigerous female paratype (RMNH.CRUS.D.57199): a, right major second pereiopod; b, idem, detail chela. Male allotype (RMNH.CRUS.D.57198): c, left major second pereiopod, chela and carpus. Scale a, c = 1 mm; b = 0.4 mm.
FIGURE 2 in Periclimenes macrorhynchia sp. nov., a new hydrozoan-associated pontoniine shrimp (Crustacea, Decapoda, Palaemonidae) from North East Kalimantan, Indonesia
FIGURE 2. Periclimenes macrorhynchia sp. nov.: a, d, ovigerous female holotype (MZB Cru 4193); b, male allotype (RMNH.CRUS.D.57198); c, e, ovigerous female paratype (RMNH.CRUS.D.57199); a–c, rostrum and carapace, lateral view; d, telson and uropods; e, distal part telson. Scale a–c = 0.8 mm; d = 0.5 mm; e = 0.2 mm.
FIGURE 10 in Periclimenes macrorhynchia sp. nov., a new hydrozoan-associated pontoniine shrimp (Crustacea, Decapoda, Palaemonidae) from North East Kalimantan, Indonesia
FIGURE 10. Periclimenes batei (Borradaile, 1917) RMNH.CRUS.D.57200. Juvenile specimen, pocl. 1.04 mm: a, left major second pereiopod. Adult male specimen, pocl. 2.0 mm: b, left major second pereiopod; c, idem, chela open, mediodorsal view; d, idem, chela closed; e, right minor second pereiopod. Scale a = 0.4 mm; b–e = 1 mm.
FIGURE 1 in Periclimenes macrorhynchia sp. nov., a new hydrozoan-associated pontoniine shrimp (Crustacea, Decapoda, Palaemonidae) from North East Kalimantan, Indonesia
FIGURE 1. Periclimenes macrorhynchia sp. nov., ovigerous female holotype (MZB Cru 4193): habitus. Scale = 2 mm.
FIGURE 7 in Periclimenes macrorhynchia sp. nov., a new hydrozoan-associated pontoniine shrimp (Crustacea, Decapoda, Palaemonidae) from North East Kalimantan, Indonesia
FIGURE 7. Periclimenes macrorhynchia sp. nov., ovigerous female paratype (RMNH.CRUS.D.57199): a, left fourth pereiopod; b, idem, detail dactylus and distal part propodus; c, left fifth pereiopod; d, idem, detail dactylus and distal part propodus. Scale a, c = 1 mm; b, d = 0.2 mm.
FIGURE 4 in Periclimenes macrorhynchia sp. nov., a new hydrozoan-associated pontoniine shrimp (Crustacea, Decapoda, Palaemonidae) from North East Kalimantan, Indonesia
FIGURE 4. Periclimenes macrorhynchia sp. nov., ovigerous female paratype (RMNH.CRUS.D.57199): a, left third maxilliped; b, left first pereiopod; c, idem, detail basal joints. Scale a = 0.4 mm; b = 1 mm; c = 0.2 mm.
FIGURE 9 in Periclimenes macrorhynchia sp. nov., a new hydrozoan-associated pontoniine shrimp (Crustacea, Decapoda, Palaemonidae) from North East Kalimantan, Indonesia
FIGURE 9. Periclimenes batei (Borradaile, 1917), RMNH.CRUS.D.57200. Juvenile specimen, pocl. 1.04 mm: a, rostrum and carapace. Adult male specimen, pocl. 2.0 mm: b, rostrum; c, fourth and fifth thoracic sternites, proximoventral view; d, telson; e, right first pereiopod; f, idem, detail basal segments. Scale a–d = 0.5 mm; e = 1 mm; f = 0.2 mm.
FIGURE 6 in Periclimenes macrorhynchia sp. nov., a new hydrozoan-associated pontoniine shrimp (Crustacea, Decapoda, Palaemonidae) from North East Kalimantan, Indonesia
FIGURE 6. Periclimenes macrorhynchia sp. nov., ovigerous female paratype (RMNH.CRUS.D.57199): a, left minor second pereiopod; b, idem, chela; d, left third pereiopod; e, idem, detail dactylus and distal part propodus. Male allotype (RMNH.CRUS.D.57198): c, right minor second pereiopod. Scale a, c, d = 1 mm; b, e = 0.2 mm.
FIGURE 3 in Periclimenes macrorhynchia sp. nov., a new hydrozoan-associated pontoniine shrimp (Crustacea, Decapoda, Palaemonidae) from North East Kalimantan, Indonesia
FIGURE 3. Periclimenes macrorhynchia sp. nov., ovigerous female paratype (RMNH.CRUS.D.57199): a, antennular peduncle, dorsal view; b, anntenal peduncle, ventral view; c, fourth and fifth thoracic sternites, proximoventral view; d, left mandible; e, left maxillula; f, left maxilla; g, left first maxilliped; h, left second maxilliped. Scale a, b = 0.5 mm; c = 1 mm; d–h = 0.4 mm.
FIGURE 13. Periclimenes obscurus Kemp, 1922, RMNH.CRUS.D.42432. Male, pocl. 2.0 in Periclimenes macrorhynchia sp. nov., a new hydrozoan-associated pontoniine shrimp (Crustacea, Decapoda, Palaemonidae) from North East Kalimantan, Indonesia
FIGURE 13. Periclimenes obscurus Kemp, 1922, RMNH.CRUS.D.42432. Male, pocl. 2.0 mm: a, left third pereiopod; b, idem, propodus and dactylus; c, idem, dactylus and distal part propodus. Scale a = 1 mm; b = 0.4 mm; c = 0.1 mm.
FIGURE 12. Periclimenes obscurus Kemp, 1922, RMNH.CRUS.D.42432. Ovigerous female, pocl. 2.5 in Periclimenes macrorhynchia sp. nov., a new hydrozoan-associated pontoniine shrimp (Crustacea, Decapoda, Palaemonidae) from North East Kalimantan, Indonesia
FIGURE 12. Periclimenes obscurus Kemp, 1922, RMNH.CRUS.D.42432. Ovigerous female, pocl. 2.5 mm: a, rostrum. Male, pocl. 2.0 mm: b, rostrum; c, telson; d, left first pereiopod; e, idem, detail basal segments; f, left second pereiopod. Scale a–c = 0.5 mm; d, f = 1 mm; e = 0.2 mm.
Data from: Population differentiation or species formation across the Indian and the Pacific Oceans? An example from the brooding marine hydrozoan Macrorhynchia phoenicea
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FIGURE 5. Macrorhynchia philippina. a in Notes on seven Aglaopheniids (Cnidaria: Hydrozoa: Aglaopheniidae) from Andaman and Nicobar Islands with three new records to India
FIGURE 5. Macrorhynchia philippina. a, Colony at Paget Island. b, Colony at Sir Hugh Ross Island. c, Nudibranch, Lomanotus vermiformes, on M. philippina at North Bay. d, Gonothecae on modified hydrocladia. Scale bar, d= 1mm.
FIGURE 6. Macrorhynchia phoenicea. a in Notes on seven Aglaopheniids (Cnidaria: Hydrozoa: Aglaopheniidae) from Andaman and Nicobar Islands with three new records to India
FIGURE 6. Macrorhynchia phoenicea. a, Colony at West Island. b, Colony overgrowing entire substrates at West Island. c, Bivalve, Pterelectroma physoides, on M. phoenicea at Elizabeth Bay. d, Hydrocaulus showing secondary branching. e, Hydrocaulus showing cauline nematothecae. f, Modified hydrocladia on hydrocaulus. Scale bar, d= 2mm, e=200µm, f= 1mm.
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