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Copyright by the Israel Malacological Society

All Rights Reserved

TRITON # 10, December 2004

Table of Contents

 
Author/s
 
Page
1. MARINE MOLLUSCS
 

Buzzurro, G. & Russo, P.

 

 

 

 

 

 

 

 

 

NOTES AND COMMENTS ON THE MEDITERRANEAN SPECIES OF THE GENUS DIODORA GRAY, 1821 (ARCHEOGASTROPODA:FISSURELLIDAE) WITH A DESCRIPTION OF A NEW SPECIES

Abstract: The following is the description of Diodora demartiniorum n. sp. based on shell characters and a statistical analysis of conchometric parameters. A comparison is also made with various species of fossil Diodora, as well as with all the species living in the Mediterranean Sea, with special regard to Diodora italica (Defrance, 1820) the taxon, which is morphologically closest to the new species.
Living specimens of Diodora demartiniorum n. sp.-which at the moment seems to be geographically confined to the coasts of northern Africa and the East Mediterranean basin-were collected at Djerba (Tunisia), in the Gulf of Strimonikòs, and in the islands of Limnos and Samothrace (Greece).
Descriptions of the new species were already published in the literature, but they were erroneously attributed to a different taxon, i.e. D. producta (Monterosato, 1880). This is a valid, but markedly different species, whose lectotype-housed in the Monterosato collection (ZMR, Rome, Italy)-is herein designated and briefly described, with the support of a corresponding set of figures.

1

 

 

 

 

 

 

 

 

 

 

Mienis, H. K.

Brief Report Concening The 1st National Malacology Congress Held In Izmir Turket

10

 

Mienis, H. K.

A CONFIRMATION OF THE PRESENCE OF TEREBRA AMOENA IN THE RED SEA

Abstract: The discovery of a living Terebra amoena among mollusc material dredged S.E. of Tiran Island, northern Red Sea, confirms the presence of this species in the Red Sea. It was previously known from a single juvenile specimen collected in the Gulf of Aqaba.

11

 

Mienis, H.K.

 

 

 

AN OLD FIND OF RETUSA DESGENETTII (AUDOUIN, 1826)
FROM THE BARDAWIL LAGOON, EGYPT

Abstract: A single shell of Retusa desgenettii was found among mollusc material from the Bardawil Lagoon, North Sinai, Egypt, which had been collected in December 1969. This means that the arrival of this Erythraean species in the Mediterranean Sea took place at least some 35 years ago.

12

 

 

 

Mienis H.K, & Revital Ben-David-Zaslow

 

 

 

 

 

 

 

 

A PRELIMINARY LIST OF THE MARINE MOLLUSCS OF THE NATIONAL PARK AND NATURE RESERVE OF AKHZIV-ROSH HANIQRA

Abstract: A study of marine molluscs collected in the National Park and Nature Reserve of Akhziv-Rosh HaNiqra, Israel, and present in the National Mollusc Collections of Israel and some private collections, resulted in the recording of 283 species. Most species had been found near Akhziv (260), followed by Rosh HaNiqra (108). The offshore islands are represented by 4 species only! Especially poor results were noted among the Scaphopods and the Cephalopods (one species each). Lessepsian and other Indo-Pacific migrants accounted for 13.4% among the species.
Many additional species (some 200) are expected to occur in the Akhziv-Rosh Haniqra area. Several habitats in the area and several special groups among the molluscs need to receive more attention during additional fieldwork in the future. Only in this way we may get a more complete idea of the biodiversity of the mollusc fauna of this unique marine reserve along the Mediterranean coast of Israel.

13

 

 

 

 

 

 

 

 

Heiman, E. L.

"SHELL NAMES" A New Interesting and Useful Book

38

Heiman E.L.,

 

 

 

 

 

 

VARIABILITY OF COWRY POPULATIONS
21. INTRASPECIFIC VARIATION IN EROSARIA LAMARCKII (GRAY, 1825)

Abstract: Intraspecific variation in Erosaria lamarckii is studied statistically using 211 shells (batches of shells from different localities), in order to learn whether it is a monotypic species or it may be divided into two subspecies. This study confirmed that in the majority of shells from East Africa the dorsal spots are partially ocellated with purplish grey, whereas in shells of the species from India and Thailand all dorsal spots are pure white, except for a few lateral ones. An intermediate zone separating Erosaria lamarckii lamarckii of East Africa from Erosaria lamarckii redimita of India, Thailand and Indonesia probably stretches from northern Kenya to Pakistan. Nine formae of E. lamarckii are recognized and illustrated.

39

 

 

 

 

 

 

Heiman E.L.,

 

 

 

 

 

 

 

 

 

 

 


VARIABILITY OF COWRY POPULATIONS
22. INTRASPECIFIC VARIATION IN ERRONEA CAURICA (LINNAEUS, 1758)

by E.L. Heiman*)
Abstract:
Qualitative statistical shell characteristics of Erronea caurica are studied using 1464 shells in order to check intraspecific variation in the species and to learn the taxonomic identity of different caurica populations. This study confirms that two caurica subspecies can be recognized in the Pacific Ocean-E. caurica caurica (Linnaeus, 1758) and E. caurica longior Iredale 1935-and four subspecies can be diagnozed in the Indian Ocean-E. caurica elongata (Perry, 1811), E. caurica quinquefasciata (Röding, 1798), E. caurica nabeqensis Heiman & Mienis, 2000 and E. caurica blaesa Iredale, 1939. E. caurica populations from the Pacific Ocean have the following shell characteristics separating them from populations of the western Indian Ocean: subcylindrical shape, narrow aperture not widened in front, coarse and long columellar teeth which cross at least half of the lip and broad fossula.
The subspecific rank of other four caurica populations: E. caurica corrosa, E. caurica dracaena, E. caurica obscurata and E. caurica samoensis is not confirmed. Eleven caurica formae are recognized in the studied material and partly illustrated.
It is stressed that the absence of the type material of the caurica taxa described in the past and unfounded use of old names for designating these taxa together with the absence of clear conchological definitions complicated the task of distinguishing between caurica populations.

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