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Chapter 35. Remarks of the benthic Ostracoda on the Tunisian Shelf

Chapter 35. Remarks of the benthic Ostracoda on the Tunisian Shelf

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450 G.~ N A D U C E M.

,

MASOLIAND N.PIJGLIESE



TEXT-FIG.

1-Sample location map.



THEENVIRONMENT

Clairefond and Cochet (1979) established 12 marine bottom facies in the Gulf of Gab& Their

data have been integrated by those furnished by Blampied, Burollet, dlairefond and Shimi (1979)

on recent sediments for the same area.

The purpose of the present paper is to define the correlation between bottom facies, sedimentology and composition of th’e ostracod assemblages belonging to the thanatocoenosis. In defining

the ostracod assemblages we did not take into consideration the fossil and allochthonous

specimens, on the basis of the previous literature and our knowledge of the living and recent

ostracod distributions in the Mediterranean Sea.

According to Clairefond and Cochet, our samples belong to the following 11 bottom facies

(Text-fig. 2):

1) coastal sand; 2) muddy sand; 3) Posidonia oceanica meadow; 4) Caulerpa prolifera meadow;

5) infralittoral mud; 6) sorted channel sand; 7) circalittoral bioclastic sand; 8) circalittoral muddy

bioclastic sand; 9) circalittoral mud; 10) outer shelf sand and gravel; 11) open marine mud.



Benthic Ostracoda on Tunisian Shev 451



T~xr-mc. 2-Bottom facies map (after Clairefond and Cochet, 1979), modified. 1) coastal sand; 2) muddy

sand; 3) Posidonia oceanica meadow; 4) Caulerpa prolifera meadow; 5 ) infralittoral mud; 6) sorted

channel sand; 7) circalittoral bioclastic sand; 8) circalittoral muddy bioclastic sand; 9) circalittoral mud;

10) outer shelf and gravel; 11) open marine mud.



THEOSTRACOD

DISTRIBUTION

1-Coastal Sand, with Posidonia and Algal Detritus.

Samples : near-shore from Cekhira and Gabts.

Bathymetry: 0-1 m.

The coastal environment from Cekhira and Gab& is mostly sandy, but appears partly rocky in

some sampling sites. In both cases, the ostracod assemblage seemed to include the same species.

The most frequently recorded were the following, in alphabetical order:

Aurila convexa (Baird, 1850)

Aurila sp. 1

Bairdia reticulata G.W. Muller, 1894

Callktocythere adriatica Masoli, 1968

Callistocythereflavidofusca (Ruggieri, 1950)



452 G.BONADUCE,

M.MASOLIAND N.PUGLIESE



Callistocythere littoralis (G.W. Miiller, 1894)

Callistocythere lobiancoi (G.W. Muller, 1912)

Caudites sp. 1

Costa batei (Brady, 1866)

Cytheretta subrudiosa (Roemer, 1838)

Hiltermannicythere aff. H. rubra (G.W. Miiller, 1894)

Loculicytheretta pavonia (Brady, 1866)

Loxoconcha bairdi G.W. Miiller, 1912

Loxoconcha rubritincta Ruggieri, 1964

Loxoconcha tumida Brady, 1868

Pontocythere turbida (G.W. Miiller, 1894)

Procytherideis complicata (Ruggieri, 1953)

Sagmatocythere napoliana (Puri, 1963)

Semicytherura acuticostuta (Sars, 1866)

Semicytherura kaloderma Bonaduce and Pugliese, 1976

Semicytherura incongruens (G .W. Miiller, 1894)

Semicytherura inversa (Seguenza, 1880)

Semicytherura sulcata (G.W. Miiller, 1894)

Triebelina raripila (G.W. Miiller, 1894)

Urocythereis neapolitana Athersuch, 1977

Xestoleberis communis G.W. Miiller, 1894

Xestoleberis rara G.W. Miiller, 1894



Together with mostly typical infralittoral marine species, we found some species which live

under a wide range of salinity conditions, such as:

Leptocythere lagunae Hartmann, 1958

Loxoconcha elliptica Brady, 1868

Loxoconcha stellifera G.W. Miiller, 1894



These species commonly occur in brackish water environments in the Mediterranean area

(Northern Adriatic Sea Lagoon, Orbetello Lagoon). Moreover, we recorded the common presence of Leptocythere macella Ruggieri, 1975 and Neocytherideis fasciata (Brady and Robertson,

1894) which are characteristic of marine environments that are strongly influenced by continental

waters (Gulf of Salerno, Gulf of Policastro, Gulf of Taranto). In the thanatocoenosis, we frequently

recorded the presence of scattered valves of Cyprideis torosa (Jones, 1857) coming from the nearby

brackish environment.



2-Muddy



Sand.



Samples: 10, 11, 12.

Bathymetry: 18-28 m.

Type of bottom: varies from sandy pelite to very sandy pelite, mostly with scattered algal

vegetation. The muddy-sand area represented by the 3 samples is located West of Dijerba Island.

The basic ostracod assemblage included : Costa edwarhi (Roemer, 1838); Cytherois triangularis

Bonaduce, Masoli, Minichelli and Pugliese, 1979; Leptocythere macella Ruggieri, 1975; Loxoconcha tumida Brad y, 1868 ; Pseudopsammocythere similis (G.W. Muller, 1894); Semicytherura

ruggierii (Pucci, 1955); Xestoleberis communis G.W. Muller, 1894.

Of lesser quantitative importance were Basslerites berchoni (Brady, 1860); Cytherois aff. C.

uffenordei Ruggieri, 1975; Microcythere spp. ; Paradoxostoma simile G.W.Muller, 1894; Semicytherura neglecta (G.W. Muller, 1894).

The cited assemblages and above all Leptocythere macella, Hemicytherura defiorei, Loxoconcha

tumida and Semicytherura rueierii, appeared fairly abundant in most of the area except for a small



Benthic Ostracoda on Tunisian Sherf 453



region at the boundary of the Caulerpa meadow where the number of specimens was very low and

the assemblage was dominated by several species of Semicytherura, and above all Semicytherura

neglecta. Moreover, we observed the scattered presence of the brackish Cyprideis torosa (Jones,

1853, which we consider a contaminant in the assemblage.



3-Posidonia oceanica Meadow.

Samples: 7, 85, 86, 87.

Bathymetry: 17-26 m.

The Posidonia oceanica meadow forms a belt around Kerkennak Isle and occurs in a small area

in front of Cekhira.

Type of bottom: more or less pelitic fine sands.

The assemblage appeared more diversified and abundant around Kerkennak Isle and included :

Aurila sp. 1

Basslerites berchoni (Brady, 1860)

Callistocytherejlavidofuscu (Ruggieri, 1950)

Callistocytherelittordis (G.W. Muller, 1894)

Callistocytheremediterranea (G.W. Miiller, 1894)

Callistocythere rastrifera Ruggieri, 1953

Caudites sp. 1

Costa batei (Brady, 1866)

Cytheretta adriatica Ruggieri, 1952

Cytheroisfrequens G.W. Miiller, 1894

Cytherois aff. C. uffenordei Ruggieri, 1975

Hemicytherura defiorei Ruggieri 1953

Loxocauda decipiens (G.W. Miiller, 1894)

Loxoconcha bairdi G.W. Miiller, 1912

Loxoconcha rhomboidea (Fischer, 1855)

Loxoconcha tumida Brady, 1868

Microcythere spp.

Polycope reticulata G.W. Miiller, 1894

Pseudopsammocythere similis (G.W. Muller, 1894)

Semicytherura acuta (G.W. Muller, 1912)

Semicytherura acuticostata (Sars, 1866)

Semicytherura alifera Ruggieri, 1959

Semicytherura kaloderma Bonaduce and Pugliese, 1976

Semicytherura quadridentata (Hartmann, 1953)

Semicytherura rarecostata Bonaduce, Ciampo and Masoli, 1976

Semicytherura sulcatu (G.W. Miiller, 1894)

Semicytherura trachina Bonaduce, Ciampo and Masoli, 1975

Tenedocythere prava Baird, 1850

Xestoleberis communis G.W. Muller. 1894



The most common species was Pseudopsammocythere similis (sample 86). The assemblage

seemed 'contaminated by scattered valves of Cyprideis torosa (Jones, 1857).

The area in front of Cekhira showed a very poor assemblage mostly consisting of Aglawcypris

complanata(Brady and Robertson, 1869), Bairdia gr. B. mediterranea G.W. Muller, 1894, Loxoconcha

bairdi G.W. Muller, 1912. Loxoconcha gibberosa Terquem, 1878, Pseudopsammocythere similis

(G.W. Muller, 1894) and juveniles of Xestoleberis communis G.W. Muller, 1894.



CCaulerpa prolifera Meadow.

Samples: 1, 2, 5, 6, 8, 13, 14, 15, 16, 17, 18, 25, 26, 27, 28, 81, 83, 84, 90, 91,92,93, 95,99.

Batfiymetry: 1548 m.



454 G.BONADUCE,

M. M ~ LAND

I N. PUGLIESE



The Caulerpa meadow is widely distributed in the area examined. It generally occurred from the

Posidonia boundary down to circalittoral bioclastic sand bottoms. It was well represented in the

area around Kerkennak Isle, in the bay south of Cekhira and east and southeast of Djerba Isle.

The type of bottom appeared different from area to area. In fact around Kerkennak Isle, it

varied from more or less pelitic fine sand to sandy pelite.

The ostracod assemblage included :

Aurila convexa (Baird, 1850)

Aurila speyeri (Brady, 1868)

Aurila sp. 1

Bairdia corpulenta G.W. Miiller, 1894

Bairdia longevaginata G.W. Miiller, 1894

Bairdia reticulata G.W. Miiller. 1894

Callistocythere fiavidofusca (Ruggieri, 1950)

Callistocythere mediterranea (G.W. Muller, 1894)

Callistocytherepraecincta Ciampo, 1976

Costa batei (Brady, 1866)

Cytherella vandenboldi Sissingh, 1971

Cyzheroisfrequens G.W. Miiller, 1894

Hemicytherura defiorei Ruggieri, 1953

Loxoconcha bairdi G.W. Miiller, 1912

Loxoconcha gibberosa Terquem, 1878

Loxoconcha rhomboidea (Fisher, 1855)

Loxoconcha rubritincta Ruggieri, 1964

Loxoconcha stellifera G .W. Muller, 1894

Loxoconcha tumida Brady, 1868

Microcythere spp.

Paracytheridea depressa G.W. Miiller, 1894

Paradoxostoma versicolor G.W. Miiller, 1894

Semicytherura aenariensis Bonaduce, Ciampo and Masoli, 1975

Semicytherura alifera Ruggieri, 1959

Semicytherura amorpha Bonaduce, Ciampo and Masoli, 1975

Semicytherura dispar (G.W. Miiller, 1894)

Semicytherura heinzei Puri, 1963

Semicytherura incongruens (G.W. Miiller, 1894)

Semicyrherura inversa (Seguenza, 1880)

Semicytherura rarecostata Bonaduce, Ciampo and Masoli, 1975

Semicvtherura robusta Bonaduce, Ciampo and Masoli, 1975

Tenedocythere prava Baird, 1850

Xestoleberis communis G.W. Miiller, 1894

Xestoleberis dispar G.W. Miiller, 1894

Xestoleberis pellucida G.W. Miiller, 1894

Xestoleberis plana G.W. Miiller, 1894

I



Callistocythere flavidofusca, Callistocythere mediterranea, Callistocythere praecincta, Costa

batei, Cytherella vandenboldi, Cytherois frequens, Hemicytherura dejiorei, Loxoconcha stellifera,

Microcythere spp., Paradoxostoma versicolor and Tenedocythere prava occurred rarely and in

scattered samples. From the bathymetric point of view, we noted the first appearance of Microxestoleberis xenomys (Barbeito-Gonzalez, 1971) at 48 m (sample 81).

In the bay south of Cekhira, the sediments varied from pelitic medium to very sandy pelite.

These sediments encircled # muddy sand-infralittoral mud area. Their depth range was between

17 and 33 m.

The ostracod assemblage was as follows:



Benthic Ostracoda on Tunision Shev 455

Aurila sp. 1

Cytherois triangularis Bonaduce, Masoli, Minichelli and Pugliese, 1979

Hemicytherura defiorei Ruggieri, 1953

Loxoconcha bairdi G.W. Muller, 1912

Loxoconcha gibberosa Terquem, 1878

Loxoconcha rhomboidea (Fisher, 1855)

Loxoconcha tumida Brady, 1868

Paracytheridea depressa G.W. Miiller, 1894

Semicytherura acuticostata (Sars, 1866)

Tenedocythereprava Baird, 1850

Xestoleberis communis G.W. Miiller, 1894

Xestoleberis dispar G.W. Miiller, 1894



We also noted the sporadic occurrence of:

Aglaiocypris rara G.W. Muller, 1894

Callistocythere diffusa (G.W. Miiller, 1894)

Callistocythere mediterranea (G.W. Miiller, 1894)

Callistocythere praecincta Ciampo, 1976

Cytheroisfrequens G.W. Miiller, 1894

Leptocythere macella Ruggieri, 1975

Pseudopsammocythere similis (G.W. Miiller, 1894)

Semicytherura dispar (G.W. Muller, 1894)

Semicytherura ruggierii (Pucci, 1955)



We cite Aurila sp. 1 (sample 17) as one of the quantitatively most important species.

The area southeast of Djerba Isle was characterized by a pelitic medium sandy bottom varying

from a depth of 16 to 25 m. This area seemed to be influenced by vortex currents (Burollet, 1979).

The ostracod assemblage included :

Aurila sp. 1

Bairdia longevaginata G.W. Muller, 1894

Bythocythere minima Bonaduce, Ciampo and Masoli, 1975

Cytherella vandenboldi Sissingh, 1971

Loxoconcha bairdi G.W. Miiller, 1912

Loxoconcha tumida Brady, 1868

Loxoconcha turbida G.W. Miiller, 1894

Paracytheridea depressa G.W. Miiller, 1894

Paracytheridea pachina Barbeito-Gonzalez, 1971

Paracytheridea parallia Barbeito-Gondez, 1971

Semicytherura alifra Ruggieri, 1959

Semicytherura inversa (Seguenza, 1880)

Tenedocythere prava Baird, 1850

Xestoleberis communis G.W. Miiller, 1894

Xestoleberis dispar G.W. Miiller, 1894

Xestoleberisplana G.W. Miiller, 1894



Some of the samples (26, 27) were very poor in ostracods.



5-Infralittoral Mud.

Sample: 9.

Bathymetry: 24 m.

This facies, restricted to a small area located southwest of Djerba Isle, was represented by a very

sandy pelite bottom. It occurred between muddy sand and the Caulerpa meadow facies.



456 G . ~ N A D U C E M.

,

MASOLI

AND N.~ G U E S E



The ostracod assemblage was characterized by the absence of dominant species; the most

common species were the following:

Costa edwardsi (Roemer, 1838)

Leptocythere macella Ruggieri, 1975

Loxoconcha rhomboidea (Fisher, 1855)

Semicytherura acuticostata (Sars, 1866)

Xestoleberis communis G.W. Miiller, 1894



We also recorded the scattered presence of:

Aurila sp. 1

Cytheridea neapolitana Kollmann, 1960

Cytherois triangularis Bonaduce, Masoli, Minichelli and Pugliese, 1979

Cytherois sp. 1

Loxoconcha tumida Brady, 1868

Paradoxostoma simile G.W. Miiller, 1894

Pseudopsammocythere reniformis (G.W. Miiller, 1894)

Semicytherura dispar (G.W. Miiller, 1894)

Xestoleberis dispar G.W. Miiller, 1894



"Sorted



Channel Sand.

Sample: 97.

Bathymetry: 17 m.

This area located west of Kerkennak Island was characterised by a coarse sandy bottom.

The ostracod fauna was very poor in both species and number of specimens and included:

Callistocythere mediterranea (G.W. Miiller, 1894), Hemicytherura defiorei Ruggieri, 1953, Semicytherura spp., Xestoleberis dispar G.W. Muller, 1894.



7-Circalittoral Bioclastic Sand.

Samples: 3, 4, 8, 18, 19, 20, 29, 31, 35, 37, 39, 40, 45, 47, 48, 49, 50, 52, 54, 55, 56, 58, 59,

60, 61, 63, 67, 68, 69, 76, 77, 79, 89, 101, 102, 105, 106, 121.

Bathymetry: 35-125 m.

Type of bottom: the grain-size of the sediments varied from shallower medium sand to the

deeper very sandy pelite.

This facies was generally circumscribed by the shallower Caulerpa meadow and the deeper

circalittoral muddy bioclastic sandy facies and appeared widely distributed in the area studied.

This facies, together with the following ones, showed a very high number of species and specimens.

Most of the species were considered allochthonous, deriving mainly from previous shallower

facies, several of which (especially the vegetable-dwellers) tended to disappear with increasing

depth. Among the contaminants, the following species occurred more commonly:

Aurila convexa (Baird, 1850)

Aurila speyeri (Brady, 1868)

Aurila sp. 1

Bairdia longevaginata G.W. Miiller, 1894

Callistocythereadriatica Masoli, 1968

Callistocythere flavidofusca (Ruggieri, 1950)

Callistocytherepraecincta Ciampo, 1976

Caudites sp. 1

Cyfherettusubradiosu (Roemer, 1838)



Benthic Ostracoda on Tunisian Sherf 457



Loxoconcha bairdi G.W. Miiller, 1912

Loxoconcha gibberosa Terquem, 1878

Loxoconcha rhomboidea (Fisher, 1855)

Loxoconcha tumida Brady, 1868

Paracytheridea depressa G.W. Miiller, 1894

Pontocythere turbida (G.W. Miiller, 1894)

Semicytherura heinzei Puri, 1963

Semicytherura inversa (Seguenza 1880)

Semicytheruraparadoxa (G.W. Miiller, 1894)

Semicytherura ruggierii (Pucci, 1955)

Xestoleberis communis G.W. Miiller, 1894

Xestoleberis dispar G.W. Miiller, 1894

35



45



55



65



75



85 95



Argilloecia



bulbifera



G.W.MOller, 1894



Argilloecia



caudata



G.W.Mtller, 1894



Bosquetina



dentata



(C.W.Mfjller, 1894)



Buntonia



sublatissirna ( Neviani, 1906)



Cluthia



keiji



Cuneocythere



sernipunctata (Brady, 1868)



NPale, 1975



Cytherella



vulgata



Ruggieri, 1952



Cytheropteron aff. C. alaturn

Cytheropteron

rnonocerns



Sars, 1866

Bonaduce e t al. 1975



Cytheropteron

Echinocythereis



sulcaturn

sp. 1



Bonaduce e t a1 1975



Eucythere

Henryhowella



curta

sarsi



Ruggieri. 1975

(G.W.MGller, 1894)



Hilterrnannicythere turbida

Krithe



aff.



Macrocypris



(G.W.MGller, 1894)



K.. praetexta (Sars, 1866)

ligustica



Microxestoleberis xenornis



Bonaduce et al. 1977

Barbeito-Gonzalez, 1971



Monoceratina



oblita



Bonaduce e t al. 1975



Parakrithe



dirnorpha



Bonaduce et al. 1975



Pterygocythereis



jonesi



(Baird, 1850)



Pterygocythereis



siveteri



Athersuch, 1978



Rectobuntonia



rniranda



Bonaduce e t al. 1975



Sagrnatocythere



versicolor



(G.W.Miiller, 1894)



Tetracytherura



angulosa



(Seguenza, 1880)



Acanthocythereis hystrix

(Seguenza, 1880)

Buntonia

sublatissirna (Neviani, 1906)

Buntonia



subulata



Ruggieri, 1954



costa



edwarsi



(Roerner, 1838)



Cytheridea



neapolitana



Kollrnann, 1960



Echinocythereis



sp. 1



Eucythere



curta



Ruggieri, 1975



Henryhowella



sarsi



(G.W.MOller, 1894)



Hilterrnannicythere turbida



(G.W.Miiller, 1894)



Monoceratina



oblita



Bonaduce e t al. 1975



Phlyctocythere



pellucida



(G.W.Mijller, 1894)



Propontocypris

Pterygocythereis



solida

jonesi



Ruggieri, 1952

(Baird, 1850)



Pterygocythereis



siveteri



Athersuch, 1978



Sagrnatocythere



versicolor



(G.W.Miiller, 1894)



Tetracytherura



angulosa



(Seguenza. 1880)



TEXT-& 3-Depth range distribution of the ostracod assemblage of bottom facies 7.



105 115 12:



458



G.BONADUCE,

M. MASOLI

AND N.PUGLIESE



The areal distribution of the species considered autochthonous did not appear uniform within

the facies. In fact, the southern area showed a reduced number of species and specimens with

respect to the northern one. Moreover, the greatest variety occurred mostly in the deepest part of

the facies.

Text-fig. 3 shows the areal and bathymetric distribution of the autochthonous species in both

areas.



8-Circalittoral Muddy Bioclastic Sand.

Samples: 21, 22, 32,33, 41,42,43,44,66, 73, 103, 104, 107, 114, 122, 129, 131.

Bathymetry: 52-175 m.

Type of bottom: varied from pelitic fine sands to more or less sandy pelites.

In spite of considerable contamination of the ostracod assemblage from the generally shallower,

previously treated facies (Aurila convexa, Bairdia spp., Callistocythere spp., Cytherois spp., Leptocythere spp., Loxoconcha bairdi, L . rhomboidea, L. tumida, Paradoxostoma versicolor, Semicytherura spp., Tenedocythere prava, Xestoleberis communis, X. dispar, etc.) we have been able to

define two areas, North and South of Kerkennak Island, respectively, which were characterised

by different assemblages. Text-figure 4 shows the composition of the assemblages and their

changes related to bathymetry.



9-Circalittoral Mud.

Samples; 23, 100.

Bathymetry: 66,67 m.

Type of bottom: pelite.

This facies was restricted to a small area located in the Ashtart basin surrounded by a circalittoral muddy bioclastic sandy facies. Allochthonous species were frequently present, the most

common of which included Callistocythere adriatica, C . flavidofusca, Cytherella vandenboldi,

Cytherois aff. C. uflenordei, Leptocythere macella, Loxoconcha tumida, Semicytherura ruggierii,

and Xestoleberis communis.

The authochthonous assemblage, represented by few specimens, mainly included:

Argilloecia acuminata G.W. Miiller, 1894

Buntonia subulata Ruggieri, 1954

Cytheridea neapolitana Kollmann, 1960

Cytheropteron aff. C . alatum Sam, 1866

Phlyctocytherepellucida (G.W. Miiller, 1894)

Pterygocythereisjonesi (Baird, 1850)

Sagmatocythere versicolor (G.W. Miiller, 1894)



10-Outer



Shelf Sand and Gravel.



Samples: 109, 120, 128, 130.

Bathymetry: 114170 m.

Type of bottom: from more or less pelitic medium-fine sand to very sandy pelite.

This type of bottom was restricted to a small area east of Kerkennak Island, characterised by a

steep topography which explains the great contamination of the ostracod assemblages from shallower facies (Aurila spp., Callistocythere spp., Caudites sp. l, Leptocythere spp., Loxoconcha

spp., Paracytheridea spp., Semicytherura spp., Xestoleberis spp., etc.).

The autochthonous assemblage included the following species:



Benthic Ostracoda on Tunisian Sheu 459



\



50



DEPTH in meters



60



70



80



SC



100 110 120 130 140 150 160 170



SPECIE>

Bosquetina



dentata



Buntonia



sublatissirna (Neviani, 1906)



(G.W.MGller,



1894)



Buntonia



subulata



Buntonia



textilrs



Ruggieri, 1954

Bonaduce e l al. 1975



Cyrherella



vulgata



Ruggieri, 1962



Cytheridea



neapolitana



Kolirnann, 1960



Cytheropteron



hadriaticum Bonaduce e t al. 1975



Cytheropteron



monoceros



Bonaduce e t al. 1975



Cytheropteron



sulcatum



Bonaduce e l al. 1975



Eucythere



curta



Ruggieri, 1975



Henryhowella



sacs1



(G.W.Muller, 1894)



Hiltermannicythere turbida



(G.W.Muller, 1894)



Phlyctocythere



pellucida



(G.W.Muller, 1894)



Polycope



rostrata



G.W.Miiller. 1894



Pterygocythereis



jonesr



(Baird. 1850)



Sagmatocythere



versicolor



(G.W.MGller,



Tetracytherura



angulosa



(Seguenza, 1880)



Argilloecia



acuminata



G.W.Muller,



Argilloecia



caudata



G.W.Miiller, 1894



Bosquetina



dentata



(G.W.Muller, 1894)



Buntonia



sublstiasirna (NevianiJ906)



Buntonre



subulata



Ruggieri, 1954



Costa



edwarsi



(Roerner, 1838)



Cytheridea



neapolitana



Cytheropteron aff. C. alatum



1894)



1894



Kollrnann, 1960

Sars, 1866



Cytheropteron



hadriaticum Bonaduce e l al. 1975



Echinocythereis



sp. 1



Henryhowella



sarsi



Microxestoleberis



xenomis



(Earbeito-Gonzaler, 1971)



Polycope



demulderi



Siasingh, 1971



Polycope



reticulate



G.W.Miiller, 1894



Polycopsis



quadridentata Bonaduce e t al. 1975



Pterygocythereis



jonesi



(Baird, 1850)



Sagmatocythere



versicolor



(G.W.Miiller,



Tetracytherura



arquloea



(Seguenza, 1880)



(G.W.Miiller, 1894)



1894)



Texr-mo. &Depth range distribution of the ostracod assemblage of bottom facies 8.

Acanthocythereis hystrix (Ruess, 1850)

Argilloecia bulbifera G.W. Miiller, 1894

Argilloecia caudata G.W. Muller, 1894

Argilloecia levis G.W. Muller, 1894

Argilloecia robusta Bonaduce, Ciampo and Masoli, 1975

Buntonia sublatissima (Neviani, 1906)

Cytherella vulgata Ruggieri, 1962

Cytheropteron aiT. C. alatum Sars, 1866

Cytheropteron monoceros Bonaduce, Ciampo and Masoli, 1975

Echinocythereis sp. 1

Eucythere curta Ruggieri, 1975

Henryhowella sarsi (G.W. Miiller, 1894)

Krithe aff. K . praetexta (Sars, 1866)

Parakrithe dimorpha Bonaduce, Ciampo and Masoli, 1975

Polycope demulderi Sissingh, 1971

Polycope parareticulata Bonaduce, Ciampo and Masoli, 1975

Poljcope reticulata G.W. Miiller, 1894

Polycope vmfiensis Sissingh, 1971

Polycopsis quadridentata Bonanduce, Ciampo and Masoli, 1975

Tuberculocythere infelix (Bonaduce, Ciampo and Masoli, 1975)



- - -15-48 24

17 36-123

7

4



Acanthocythereis

Aglaiocypris

Aglaiocypris

Argilloecia

Argilloecia

Argilloecia

Argilloecia

Argilloecia

Argilloecia

Aurila

Aurila

Aurila

Bairdia

Bairdia

Bairdia

Bairdia

Basslerites

Bosquetina

Buntonia

Buntonia

Buntonia

Bythocythere

Callistocythere

Callistocythere

Callistocythere

Callistocythere

Callistocythere

Callistocythere

Callistocythere

Caudites

Cluthia

Costa

Costa

Cuneocythere

Cytherella

Cytherella

Cytheretta

Cytheretta

Cytheridea

Cytherois

Cytherois

Cytherois

Cytherois

Cytheropteron

Cytheropteron

Cytheropteron

Cytheropteron

Cytheropteron

Echinocythereis

Eucythere

Hemicytherura

Henryhowella

Hilterrnannicythere

Hiltermannicythere

Krithe

Leptocythere

Leptocythere

Loculic ytheretta

Loxocauda

Loxoconcha

Loxoconcha

Loxoconcha

Loxoconcha

Loxoconcha

Loxoconda

Loxoconcha



TExr-pro. S-Ostracod



5



6



hystrix

complanata

rare

acuminata

bulbifera

caudata

levis

minor

robusta

convexa

speyeri

sp. 1

corpulenta

longevaginata

mediterranea group

reticulata

berchoni

dentata

sublatissirna

subulata

textilis

minima

diffusa

flavidofusca

littoralis

lobiancoi

medi terranea

praecincta

rastrifera

sp. 1

keiji

batei

edwarsi

semipunctata

vandenboldi

vulgata

adriatica

subradiosa

neapolitana

frequens

triangular is

aff. C. uffenordei

sp. 1

aff. C. d a t u m

hadriaticum

monoceros

wlcatum

venusturn

sp. 1

curta

defiorei

sarsi

aff. H. rubra

turbida

aff. K. praetexta

lagunae

macella

pavonia

decipiens

bairdi

elliptica

gibberosa

rhomboidea

rubritincta

stellifera

tumida



,



distribution plot



des and depth range.



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Chapter 35. Remarks of the benthic Ostracoda on the Tunisian Shelf

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