The Wyoming Jurassic fossil Dentalium subquadratum Meek, 1860 is not a scaphopod but a serpulid worm tube

2004 ◽  
Vol 39 (2) ◽  
pp. 85-91 ◽  
Author(s):  
C. P. Palmer
Keyword(s):  



Facies ◽  
1997 ◽  
Vol 36 (1) ◽  
pp. 57-67 ◽  
Author(s):  
Baba Senowbari-Daryan
Keyword(s):  


1999 ◽  
Vol 73 (4) ◽  
pp. 634-640 ◽  
Author(s):  
Ellis L. Yochelson ◽  
Ronald Goodison

Dentalium martini Whitfield, 1882, is a calcareous worm tube, not a mollusk, and is placed in synonymy of Coleolus crenatocinctum Hall, 1879. The growth of D. martini mimics logarithmic curvature in the holotype, but in other specimens shape varies from irregularly curved to straight. A prime reason for reassignment is variation of the wall thickness around the circumference in D. martini, which in late Paleozoic and Recent scaphopods of the same size is of uniform thickness.



2001 ◽  
Vol 53 (3) ◽  
pp. 253-255 ◽  
Author(s):  
C. P. Palmer
Keyword(s):  


1986 ◽  
Vol 60 (3) ◽  
pp. 680-688 ◽  
Author(s):  
Ellis L. Yochelson

Styliolina obtusa (Hall, 1879), only known from specimens on two slabs, is placed in synonymy with S. fissurella (Hall, 1843), a ubiquitous fossil in western New York. Styliolina spica (Hall, 1888) is known only from the holotype. This individual is about three times larger than specimens of S. fissurella (Hall); it is removed from the genus. “S.” spica is based on the broken apical end of a calcareous worm tube and is similar to Coleolus. Both of these poorly known taxa were described from different intervals in the Wanakah Shale Member of the Ludlowville Formation near Buffalo, New York.





2010 ◽  
Vol 91 (6) ◽  
pp. 1295-1305
Author(s):  
Ilana Rosental Zalmon ◽  
Merit McCrea ◽  
Milton Stevens Love

A biogenic structure ecosystem of extensive worm tubes of Chaetopterus sp. harbouring different fish species was investigated at Anacapa Island, southern California to determine the numerical abundance, species composition, body size, and seasonality of the ichthyofauna associated, and their relation with the worm patch size. Bimonthly, a 30-m swimming transect and a quadrat-based survey estimated the length of each fish, the type of habitat it occupied, and the worm tube patch size-class. Larger worm mats harboured higher densities of fish, mainly the dominants Rhinogobiops nicholsii and Chaenopsis alepidota, which live inside the worm tube patches. Fish population density varied between the ‘inside’ and ‘edge’ of Chaetopterus beds as smaller and younger individuals were hindered from reaching the middle of the patch by larger, older and territorial individuals. The prevalence of positive and significant correlations between the abundance of smaller individuals of R. nicholsii and specific habitat features (e.g. edge) suggests that the abundance and distribution of juveniles might be habitat-dependent besides intraspecific competition between older and younger individuals. There was a decreasing density of R. nicholsii at greater than 20 cm away from worm tubes and there were no individuals beyond 6 m away from structure. Chaenopsis alepidota was not recorded when the patch size was less than 50% tube coverage. Our results revealed that complex habitat structure had a positive influence on the abundance of juvenile and adult of C. alepidota and R. nicholsii, and suggest that these structured areas are preferentially utilized, which contributes to its patchy distribution pattern. The presence of biological structures in low-relief sedimentary habitats can have critical functional significance even for reef fish. These important habitat features may need to be identified and protected.



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