CATALOG OF ORIGINAL DESCRIPTIONS: Rotalina cultrata d'Orbigny 1839

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: pf_cat -> R -> Rotalina -> Rotalina cultrata
Other pages this level: R. canariensis, R. cultrata, R. hirsuta, R. truncatulinoides

Rotalina cultrata

Citation: Rotalina cultrata d'Orbigny 1839
Rank: species
Type locality: Not designated. Localities given Cuba, la Martinique, la Guadeloupe, et la Jamaïque.
Type age (chronostrat): Récent.
Type sample (& lithostrat): Sables marins. Assez commune
Type specimens: 1959.7.27.4 - neotype designated by Banner & Blow (1960):
Type repository: London, UK; NHM

Linked specimens: London, UK; NHM (1959.7.27.4)

Current identification/main database link: Globorotalia menardii (Parker, Jones & Brady, 1865 after dOrbigny, 1826 nomen nudum)


Original Description

Rotalina. Testa ovali, depressissima, punctata, carinata, cultrata supra subcomplanata, subtus convexiuscula; spira subplana, anfractibus duobus limbatis; loculis sex ovatis, contectis, supra limbatis.  

Coquille ovalaire, très fortement d éprimée, plus convexe en dessous qu'en dessus, très fortement carénée et tranchante sur ses bords, légèrement pointillée. Spire presque plane, composée de deux tours croissant très rapidement, dont les sutures sont marquées d'un bourrelet assez visible. Loges au nombre de six au dernier tour, tout es fortement carénées, presque plan es en dessus, un peu convexes en dessous, arrondies en festons sur leur pourtour, simples sur leurs sutures en dessous, bordées en dessus, assez peu obliques, la dernière arrondie; point de disque ombilical, les loges se réunissent simplement au centre. Ou verture peu longue sur le retour de la spire. Couleur, blanc uniforme.

Description of neotype.-The fairly large test consists of about three whorls of fairly rapidly enlarging chambers arranged in a moderately low trochospire. There are about 6 chambers present in the last whorl. The equatorial profile of the test is sub-circular and its equatorial periphery is moderately lobulate. In axial profile the test is compressed, being almost equally biconvex, and the axial periphery is acute and carinate. In dorsal aspect the chambers are weakly inflated and are little, if at all, embracing; the chambers are nearly as broad radially as they are long circumferentially. The dorsal sutures are slightly depressed and are thickened with a deposit of clear shel! material which appears to be continuous with the imperforate peripheral carina. The proximal ends of the dorsal intercameral sutures meet the moderately lobulate spiral suture almost at right angles or obtusely, the angle increasing during ontogeny. These sutures are strongly recurved and meet the periphery almost tangentially. In ventral aspect the chambers are sub-triangular and are moderately inflated. The ventral intercameral sutures are depressed, not thickened or limbate, and are nearly "radial, being slightly curved to sinuous. The umbilicus is small (compared to overal! test size) but it is open and deep. The inner parts of the ventral chamber sides form inconspicuous umbilical shoulders. The primary aperture is interiomarginal, umbilical-extraumbilical, a moderately high arch extending for the full length of the ventral basal suture of the final chamber. The primary aperture is furnished along its length with a thin, fairly broad lip. Relict parts of the apertures of the later chambers of the last whorl, together with their lips, may be seen within the umbilicus. The apertural face of the terminal chamber is slightly flattened although there is no angular delimitation between it and the adjacent ventral face; the apertural [ace is limited peripherally by a slender continuation of the carina and the face becomes very slightly concaJle between the carina and the aperture. The wal! is finely perforate, except in the imperforate regions of the dorsal sutures and the peripheral carina. The.surface of the test is smooth except for weakly pustulose areas on the ventral faces of the first two chambers of the last whorl and on the umbilical shoulder of the third chamber of the last whorl. The early part of the peripheral carina is faintly hispid. [Banner & Blow 1960]


Size: Diamètre 1/3 de millim.

Maximum diameter of neotype: 0.92 mm. [Banner & Blow 1960]


Extra details from original publication
Il est évident que, par sa forme générale et les bordures de ses loges, cette espèce a les plus grands rapports avec nos Rotalina limbata de l'Adriatique et R. nitida de l'île Sainte -Hélène; mais elle s'en distinque par une plus grande dépression, ce qui la rend bien plus tranchante. Le nombre de ses loges, au dernier tour, est aussi différent; elle se contourne indifféremment à droite ou à gauche."

FROM BANNER & BLOW 1960

Taxonomic remarks: D'Orbigny (1839) described this species from recent marine sands of Cuba, Martinique, Guadaloupe and Jamaica. It was adequately described both in Latin and French and well illustrated. With the assistance of MM. Marie, Lys and Sornay we searched through the A. d'Orbigny collections in Paris but were unable to find any syntypic material of this species. The French authorities are in agreement with us that no syntypes exist. Consequently, we examined topotypic material for specimens which agree with d'Orbigny's descriptions and illustrations. Apertural face of the terminal chamber is slightly flattened specimen (illustrated here) was found in material collected by A. Earland from recent sands off Cape Cruz, Cuba, and it is clearly conspecific with d'Orbigny's form. We could find no other form which could possibly be ascribed to that described and illustrated by d'Orbigny. D'Orbigny noted (op. cit., loco cit.) that R. cultrata was common in the areas he mentioned; the specimen here illustrated belongs to a species which is common in the same areas, and which, like d'Orbigny's species R. cultrata, shows""... les plus grands rapports avec nos Rotalina limbata de l'Adriatique et R. nitida de I'ile Sainte-Helene; rnais elle s'en distinque par une plus grande depression, ce qui la rend bien plus tranchante"" (d'Orbigny, op. cit., p. 76). The specimen illustrated here (pl. 6, figs. la-c) which came from unsorted material in the Earland collection in the British Museum (Natural History), is now isolated into a single-celled slide and registered as specimen number 1959.7.27.4 in the British Museum (Natural History) records. In accordance with the Copenhagen Decisions on Zoological Nomenclature (Hemming, 1957, pp. 28-31) we hereby propose this specimen as neotype of the species Rotalina cultrata d'Orbigny 1839.

Remarks:-As d'Orbigny pointed out (op. cit., p. 76) Rotalina cultrata only differs from Rotalia limbata and R. nitida in its flatter, more compressed test and in the presence of six chambers in the last whorl as compared to five in ""limbata"" and "" nitida."" It is interesting to note that although d'Orbigny's syntypes of R. limbata and R. nitida are the same as the popula; concept of ""R. menardii d'Orbigny,"" d'Orbigny, himself, never used his earlier name R. menardii after 1826. A review of forms ascribed by authors to "" Globorotalia menardii d'Orbigny"" shows a variation in the number of chambers in the last whorl, ranging from 5 8. Like these authors, we consider that the number of chambers in the last whorl, within these limits and by themselves, are not of taxonomic importance in this species. The number of chambers per whorl often increases during ontogeny and seems to be associated with ecological factors. However, certain large multicamerate forms, at present largely restricted to tropical waters, seem to be worth considering at subspecific level. These forms include those described as Globorotalia menardii var. multicamerata Cushman and Jarvis 1930 and Globorotalia menardii var. fijienJiJ Cushman 1934. Besides merely possessing additional chambers in the last whorl, there are other differences such as chamber shape and rate of the opening of the spire which have to be considered. It seems likely that these multicamerate forms show geographical subspeciation orriginating from Rotalina cultrata which is here considered to be referable to the genus Globorotalia Cushman 1927 JenJU Jtricto (see Banner and Blow, 1959). We believe that Rotalina limbata d'Orbigny, Rotalia nitida d'Orbigny, Rotalia menardii Parker, Jones and Brady and Discorbina sacharina Schwager 1866 are all conspecific with (although not necessarily fully synonymous with) Rotalina cultrata d'Orbigny 1839. Globorotalia cultrata (d'Orbigny) has been recorded by authors (as "" Globorotalia menardii (d'Orbigny)"") from Uppermost Burdigalian to Recent (see Blow, 1959); an outline of the phylogeny of the G. cultrata stock is given in text-figure 2 (p. 28). [Banner & Blow 1960]

"

References:

Banner, F. T. & Blow, W. H. (1960a). Some primary types of species belonging to the superfamily Globigerinaceae. Contributions from the Cushman Foundation for Foraminiferal Research. 11: 1-41. gs V O

d'Orbigny, A. (1839a). Foraminiferes. In, de la Sagra, R. (ed.) Histoire physique et naturelle de l'Ile de Cuba. A. Bertrand, Paris, France 1-224. gs V O


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Rotalina cultrata compiled by the pforams@mikrotax project team viewed: 9-3-2021

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