Distansescharella alcicornis ( Jullien, 1882 ) López-Fé, 2006
publication ID |
https://doi.org/ 10.1080/00222930601043763 |
persistent identifier |
https://treatment.plazi.org/id/2C138783-DC16-5504-E35E-FEDCFB7521B4 |
treatment provided by |
Felipe |
scientific name |
Distansescharella alcicornis ( Jullien, 1882 ) |
status |
comb. nov. |
Distansescharella alcicornis ( Jullien, 1882) View in CoL comb. nov.
( Figures 7 View Figures 4–7 , 8 View Figures 8–13 ; Table III)
Cribrilina alcicornis Jullien 1882 View in CoL ; Harmelin 1978; Harmelin et al. 1989.
Material
Numerous colonies, with ovicells and ancestrulae, in both ‘‘ Madrepora 1’’ ( MNCN 25.03/ 3732) and ‘‘ Madrepora 2’’ ( MNCN 25.03/3737). Figured material, from ‘‘ Madrepora 1’’: MNCN 25.03/3723.
Descriptions
See Harmelin (1978) and Harmelin et al. (1989).
Remarks
Cribrilina alcicornis Jullien View in CoL is a well-known species which does not need redescription. The numerous colonies present in the material from the Enmedio Volcan fit perfectly with previous descriptions ( Harmelin 1978; Harmelin et al. 1989), although autozooids are slightly larger than in colonies from more northern waters. However, this report considerably enlarges the known geographical limits of the species, not previously cited southwards from the Straits of Gibraltar ( Harmelin 1978; Harmelin et al. 1989). Otherwise, the depth of collection is within the previously known range of this bathyal species.
Assigning Cribrilina alcicornis View in CoL to the genus Distansescharella d’Orbigny View in CoL follows the opinion of Harmelin et al. (1989), who suggested that Distansescharella seguenzai Cipolla View in CoL and Cribrilina alcicornis View in CoL could be congeneric, although they did not formally propose the new binomen. After the clarification of Cribrilina Jullien View in CoL by Bishop (1986, 1994), Cribrilina alcicornis View in CoL cannot be retained in this genus, whose avicularia, when they exist, are adventitious and located at the sides of the orifice.
Harmelin et al. (1989) based their suggestion of a generic affinity between Distansescharella seguenzai View in CoL and Cribrilina alcicornis View in CoL on the similarity of the frontal shield, ovicell, number of spines, and the shape of the avicularia and the ancestrula. In both cases, the avicularia are vicarious. The zooids of D. seguenzai View in CoL are linked by short tubules, and an alternation of kenozooids and avicularia separate the autozooids. Distansescharella alcicornis View in CoL only occasionally has kenozooids, occupying spaces which leave no room for an autozooid. In addition, the zooids of D. alcicornis View in CoL are united by dietellae in their walls, not by tubules. With these features, D. alcicornis View in CoL is even more similar than D. seguenzai View in CoL to the type species Distansescharella familiaris (von Hagenow) View in CoL , which lacks kenozooids (except for filling occasional small spaces) and is not disjunct. Distansescharella familiaris View in CoL was redescribed, and a neotype was chosen, by Voigt (1959), and was also discussed and figured by Harmelin et al. (1989). Both D. seguenzai View in CoL and D. alcicornis View in CoL lack the large spatulate avicularia of D. familiaris View in CoL , but as Harmelin et al. (1989) proposed, this may be a specific character of the type species.
MNCN |
Museo Nacional de Ciencias Naturales |
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Kingdom |
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Family |
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Genus |
Distansescharella alcicornis ( Jullien, 1882 )
López-Fé, C. M. 2006 |
Distansescharella alcicornis
López-Fé 2006 |
D. alcicornis
López-Fé 2006 |
D. alcicornis
López-Fé 2006 |
D. alcicornis
López-Fé 2006 |
Distansescharella seguenzai
Cipolla 1921 |
Distansescharella seguenzai
Cipolla 1921 |
D. seguenzai
Cipolla 1921 |
D. seguenzai
Cipolla 1921 |
D. seguenzai
Cipolla 1921 |
Cribrilina alcicornis
Jullien 1882 |
Cribrilina alcicornis
Jullien 1882 |
Cribrilina alcicornis
Jullien 1882 |
Cribrilina alcicornis
Jullien 1882 |
Cribrilina alcicornis
Jullien 1882 |
Cribrilina alcicornis
Jullien 1882 |
Distansescharella d’Orbigny
d'Orbigny. The 1853 |