+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

The anatomy of some new archaeogastropod limpets superfamily peltospiracea from hydrothermal vents

, : The anatomy of some new archaeogastropod limpets superfamily peltospiracea from hydrothermal vents. Journal of Zoology (London) 218(1): 123-169

The anatomy is described of seven new species of limpet from hydrothermal vents in five new genera in the new family PELTOSPIRIDAE, new superfamily PELTOSPIRACEA (McLean, 1989). Distinguishing external features are: (1) the tapering snout; (2) no eyes; (3) epipodium with tentacles variously modified; (4) deep mantle cavity; (5) single left bilamellate gill with pectiniform skeleton; (6) separate sexes; (7) no copulatory organ; (8) mantle edge with two fold, the outer secreting the shell with an inturned rim of periostracum, the inner sensory and differing in detailed structure of the secreting areas. Limpet form is attained by the anterior migration of the posterior viscera into the mantle skirt on the right side. On the left is the single kidney, with monotocardian characteristics, followed posteriorly by the auricle and then the ventricle (not transversed by the rectum), which marks the posterior limit of the mantle cavity. The auricle receives blood from a pallial as well as a ctenidial circulation. There is no right kidney but a pallial excretory organ opens right of the rectum. The radula is rhipidoglossate. The alimentary canal resembles that of a primitive prosobranch though with an odontophore indicating more powerful action, a subradular organ protrusible through the mouth and held in position by the tapering snout, and paired oesophageal pouches providing the most voluminous cavity of the body. The gonadial duct acts as a vesicula seminalis in the male, and in the female opens into the kidney, the external opening of which is, in this sex, urinogenital. A second, receptacular duct, pallial in origin, connects with the ovary, opening to the mantle cavity near the anterior limit of the shell muscle and receiving seminal fluid emitted from the pallial vas deferens. Sperm are discharged directly into the ovarial duct, viable ones are stored and effete ones digested. The anatomy indicates that fertilization is internal. A levator muscle regulates the position of the openings of the gonadial and receptacular ducts within the ovary. It originates alongside the median margin of the right limb of the horseshoe-shaped shell muscle.


DOI: 10.1111/j.1469-7998.1989.tb02530.x

Other references

Lakatos, L.; Hatvani, I.; Oroszlán, G.; Balla, G.; Karmazsin, L.; Alaka, O.; Kincses, E.; Szabó, I.; Lakatos, Z., 1986: Controlled trial of D-penicillamine to prevent retinopathy of prematurity. 204 infants with birthweights between 751 and 2000 g and 26-35 weeks gestational age (100 treated and 104 control subjects) were enrolled in a prospective controlled trial of the effectiveness of D-penicillamine (DPA) in the prevention of retinopa...

Yamaguchi, I.; Fujita, F.; Yamanouchi, K.; Mishima, T.; Kawahara, D.; Sakai, Y.; Ito, S.; Kanetaka, K.; Takatsuki, M.; Kuroki, T.; Eguchi, S., 2014: A novel animal model of long-term sustainable anal sphincter dysfunction. Although intersphincteric resection can avoid the need for permanent colostomy in patients with lower rectal cancer, it sometimes causes anal sphincter dysfunction, thus resulting in a lifelong, debilitating disorder due to incontinence of solid a...

Galasko, D., 1999: Cerebrospinal fluid opens a window on Alzheimer disease. Archives of Neurology 56(6): 655-656

Schöffski, P.; Dumez, H.; Clement, P.; Hoeben, A.; Prenen, H.; Wolter, P.; Joniau, S.; Roskams, T.; Van Poppel, H., 2006: Emerging role of tyrosine kinase inhibitors in the treatment of advanced renal cell cancer: a review. Advanced and metastatic renal cell cancer (RCC) is resistant to conventional chemotherapy. Only a very small number of patients survive long term after immunotherapy. However, any effect of interleukin-2 (IL-2) and/or interferon on median overall...

Winter, L.E.; Duvall, A.J., 1967: Thorotrastomas of the neck. Radical neck dissection for thorotrast granuloma of the neck is reported. This therapy was shown to be effective in the treatment of the granulomas.

Dong, S.; Carazo, A.Vazquez.; Park, S.Ho., 2013: Equivalent circuit and optimum design of a multilayer laminated piezoelectric transformer. A multilayer laminated piezoelectric Pb(Zr(1-x)Ti(x))O(3) (PZT) ceramic transformer, operating in a half- wavelength longitudinal resonant mode (λ/2 mode), has been analyzed. This piezoelectric transformer is composed of one thickness-polarized s...

Potomac Division O.The American Phytopathological Society, 2000: 2000 Meeting of the Potomac Division of the American Phytopathological Society. Phytopathology 90(6 Supplement): S131-S134, June

Gersch, M., 1978: The classical conception of the hormonal regulation of insect development in view of new experimental data: production of moulting hormone outside the prothoracic glands. The classical assumption has been that the only source of the moulting hormone ecdysone in insects is the prothoracic glands. However, recent data here reviewed from the literature show that ecdysteroids are produced in the abdomens of ligated ins...

Nelson, E.; Atchley, P.; Little, T.D., 2009: The effects of perception of risk and importance of answering and initiating a cellular phone call while driving. Recent data suggest that laws banning cellular phone use while driving may not change use patterns, especially among young drivers with high rates of mobile phone adoption. We examined reasons younger drivers choose or do not choose to talk on a p...

Grunwald, N.J.; Van Bruggen, A.H.C., 1996: Carbon source utilization patterns during decomposition of an oat-vetch residue in soils from two farming systems. Bulletin of the Ecological Society of America 77(3 SUPPL PART 2): 174