Corresponding author: Benny K.K. Chan (
Academic editor: Niel Bruce
A new species of intertidal acorn barnacle
Taxonomic studies of Iranian barnacles after
The holotype and two paratypes are deposited in the Zoological Museum, University of Tehran (ZUTC) and one of the paratype was deposited in the Biodiversity Museum, Academia Sinica, Taiwan (ASIZCR).
HOLOTYPE. ZUTC-Cirri 1275, 1 specimen, Ramin, Chabahar, Gulf of Oman, Iran (
Parietes white or pink, tergum very narrow, basal margin slightly concave or almost straight, tergal spur long and narrow. Mandible with five teeth, labrum with 4 large sharp teeth on each side of the cutting edge. Anterior ramus of cirrus I antenniform.
This species is named in honour of Ehsan Entezari-Zarch, B.Sc. student in Animal Biology at the University of Tehran, who unfortunately passed away during a field collection in October 2009.
This species was present at the exposed low shores at intertidal zone, attaching on rocks but sometimes were observed on mollusk shells and on the shell surface of the barnacle
At present, only known from the Iranian coast in the Gulf of Oman and absent from the Persian Gulf (see
Morphological comparison of
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Shell colour | White to pink | Pink to grey | White to pink | Pink to white |
Tergum colour and length | White, twice longer than wide | Yellow to pink, longer than wide (less than twice) | Yellow to pink, longer than wide (less than twice) | White,longer than wide(about twice) |
Tergum Spur | Longer than wide(~1.2 times) | Wider than long (~1.2 times) | Wider than long (about twice) | Wider than long (1.5 times) |
Basal margin of tergum | Slightly concave with no clear angle | Strongly concave, forming almost right angle | Strongly concave, forming almost right angle | Slightly concave |
Adductor muscle pit in scutum | shallow | deep | shallow | deep |
Adductor ridge in scutum | Extremely developed, angular and extending to basal margin | Developed but not extending to basal margin | Developed but not extending to basal margin | Extremely developed |
Labrum teeth | Four, large, sharp and erect on each side of notch | Absent or four small blunt on cutting margin | Four small blunt teeth at each side of the cutting margin | Six small teeth in notch |
Cirrus III | Non-antenniform, without multicuspidate setae | Non-antenniform, without multicuspidate setae | Antenniform, with multicuspidate setae | Antenniform, without multicuspidate setae |
The biogeography of
The financial supports to A. Shahdadi and A. Sari were provided by the Ministry of Science, Research and Technology of Iran and office of Research affairs, University of Tehran. B.K.K.Chan was supported from the Career Development Award by Academia Sinica, Taiwan (AS-98-CDA-L15) and a grant from the National Science Council, Taiwan (NSC-99-2621-B-001-007-MY3). The authors would like to thank the SEM unit of the Academia Sinica, Taiwan for preparation of materials for SEM studies.