Distansescharella alcicornis ( Jullien, 1882 ) López-Fé, 2006

López-Fé, C. M., 2006, Some bathyal cheilostome Bryozoa (Bryozoa, Cheilostomata) from the Canary Islands (Spain, Eastern Atlantic), with descriptions of three new species, a new genus, and a new family, Journal of Natural History 40 (29 - 31), pp. 1801-1812 : 1807

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

Kingdom

Animalia

Phylum

Bryozoa

Class

Gymnolaemata

Order

Cheilostomatida

Family

Cribrilinidae

Genus

Distansescharella

Loc

Distansescharella alcicornis ( Jullien, 1882 )

López-Fé, C. M. 2006
2006
Loc

Distansescharella alcicornis

López-Fé 2006
2006
Loc

D. alcicornis

López-Fé 2006
2006
Loc

D. alcicornis

López-Fé 2006
2006
Loc

D. alcicornis

López-Fé 2006
2006
Loc

Distansescharella seguenzai

Cipolla 1921
1921
Loc

Distansescharella seguenzai

Cipolla 1921
1921
Loc

D. seguenzai

Cipolla 1921
1921
Loc

D. seguenzai

Cipolla 1921
1921
Loc

D. seguenzai

Cipolla 1921
1921
Loc

Cribrilina alcicornis

Jullien 1882
1882
Loc

Cribrilina alcicornis

Jullien 1882
1882
Loc

Cribrilina alcicornis

Jullien 1882
1882
Loc

Cribrilina alcicornis

Jullien 1882
1882
Loc

Cribrilina alcicornis

Jullien 1882
1882
Loc

Cribrilina alcicornis

Jullien 1882
1882
Loc

Distansescharella d’Orbigny

d'Orbigny. The 1853
1853
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