295:, as each worm tries to inject sperm into the other with one of its two stubby penises, while trying to avoid being inseminated itself. One explanation advanced for this behavior is that the female role entails more investment in the resulting fertilized eggs. Another possible explanation is that the duel awards mating advantage to the better of two dueling partners—so that the penis duel's loser, becoming the "female," is compensated by creating offspring with genes even better than hers.
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is intense blue to black with white and orange peripheral bands and a purple fringe. The two short cephalic antennaie are easily overlooked because they are the same color as the body. Inferiorly, this species is purple with a medial line."
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Using new camera technology, Marine
Biologist Leslie Newman of Australia's Southern Cross University participated in filming the marine flatworm Pseudobiceros hancockanus engaging in some odd reproductive behavior -- referred to as penis
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Eberhard also points out the difficulty of untangling the interests of the sexual combatants. Is a dodging partner just filtering out lousy duelers?
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It is thought to feed on small invertebrates that live in sponges in coral reefs rather than eating the coral itself.
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with each individual able to function as either a male or female. Mating between two such worms involves
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reefs, other times among coral fragments or stones. It has been observed near such places as
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Pseudobiceros hancockanus (Collingwood, 1876) This is not nudibranch or sea slug.
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is translucent gray with a white line only on the outside, while the margin of
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is pure bright white. It can grow up to 14 cm (5.5 inch) in length.
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can travel long distances, swimming by undulating the edges of its body.
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Museum, c=AU; co=Queensland
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392:: CS1 maint: multiple names: authors list (
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432:"Fighting to mate: Flatworm penis fencing"
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317:Harry Erhardt; Horst Moosleitner (1998).
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323:. Steven Simpson Books. p. 519.
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209:is very similar in appearance to
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457:"Hermaphrodites duel for manhood"
234:lives in warm seas, sometimes on
277:Like other members of the genus
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320:Baensch Marine Atlas, Volume 2
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345:"Pseudobiceros uniarborensis"
408:"Pseudobiceros hancockanus"
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484:PBS website with video of
665:Animals described in 1876
536:Pseudobiceros_hancockanus
507:Pseudobiceros hancockanus
486:Pseudobiceros hancockanus
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232:Pseudobiceros hancockanus
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176:of hermaphroditic marine
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41:Scientific classification
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25:Pseudobiceros hancockanus
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227:Habitat and distribution
184:. It is also known as
198:Baensch Marine Atlas,
370:"Hancock's Flatworm"
132:P. hancockanus
16:Species of flatworm
186:Hancock's Flatworm
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499:Taxon identifiers
374:www.qm.qld.gov.au
196:According to the
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459:. Science News
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141:Binomial name
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461:. Retrieved
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412:. Retrieved
410:. Nudi Pixel
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377:. Retrieved
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349:. Retrieved
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273:Reproduction
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660:Turbellaria
570:iNaturalist
192:Description
158:Collingwood
88:Polycladida
654:Categories
463:2011-01-24
438:2011-01-24
414:2011-01-24
379:2022-10-11
351:2011-01-24
299:References
94:Suborder:
240:Indonesia
126:Species:
64:Kingdom:
58:Eukaryota
588:11132245
522:Q3015084
516:Wikidata
444:fencing.
388:cite web
262:Behavior
178:flatworm
104:Family:
74:Phylum:
68:Animalia
54:Domain:
624:5023412
601:1047280
562:4859871
174:species
160:, 1876)
114:Genus:
98:Cotylea
84:Order:
637:879578
621:uBio:
614:879578
575:325946
327:
246:, and
632:WoRMS
583:IRMNG
549:4NPT8
434:. PBS
248:Kenya
236:coral
172:is a
609:OBIS
596:ITIS
557:GBIF
394:link
325:ISBN
254:Diet
244:Fiji
544:CoL
531:AFD
287:is
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
