R. C. Willan (41 results)

Pamphlet. Condition: Very Good. Vol 78, pp. 1619-1656, Maps, Illus, 4to, Extracted from orig vol, thus begins with title page, trimmed & stapled pamphlet, else VG.

Tiré à part du Journal of the Royal Society of New Zealand - 1980, 11 pages Très bon état - Pour les envois hors de France, la tafication «livre & brochure» pour les frais de port a disparue.Les frais de port annoncés correspondent à une moyenne. Ils seront calculés au plus juste en fonction du poids de votre article.…

10 pp., 2 figs, br. 8.

5 pp., 1 fig., gr. 8.

8 pp., 1 fig., gr. 8.

Thecacera boyla n. sp is described from coastal northern Queensland. Its most striking character is the elaboration of the rhinophoral sheaths into long, mobile ?tentacles? that serve as sensory appendages, apparently in lieu of velar papillae. The genus Thecacera is holophyletic and probably derived from Polycera ? like polycerids. Because four (possibly five) of the six valid biological species are tropical, it is probable Thecacera is tropically centered. There appears to be a gradient of decreasing species diversity eastwards from southeastern Africa. 12 pp., 17 figs, gr. 8.…

Two common and widespread New Zealand bivalves are currently confused under the name Gari lineolata (Gray in Yare, 1835). The taxon is applicable to one of these species; the other is here named Gari hodgei n. sp. 11 pp., 3 figs, gr. 8.

The aeolid nudibranch Godiva quadricolor (Barnard, 1927), previously recorded as introduced into southern Western Australia (i.e., the Fremantle-Cockburn Sound area) and now probably naturalised there, is herein recorded from southern Queensland (i.e., Pumicestone Passage, immediately north of the Port of Brisbane), where a breeding population is presently established. The most likely source of both introductions is shipping. Godiva quadricolor originally extended naturally through (tropical) eastern and (temperate) south-eastern Africa, so its further spread around the Australian continent seems inevitable. This paper records the characters important for recognition of this species, corrects the author s earlier account of the morphology of the rhinophores, and describes intraspecific variation, particularly that relating to coloration of the head and cerata. Godiva rachaelae Rudman, 1980 is formally synonymised with G. quadricolor. Godiva quadricolor is now recorded as introduced in southern Western Australia, eastern Australia (herein), north-western Africa and the Mediterranean Sea, but it has never occurred naturally in the Indo-Pacific Ocean. 6 pp., 2 figs, 4.…

10 pp., 1 pl., 4 figs, gr. 8.

10 pp., 17 figs, 4.

6 pp., 1 fig., 4.

12 pp., 4 figs, 4.

Further review of the literature reveals that type designations earlier than, or different from, those proposed by Valdes (2001) are available for Umbraculum Schumacher, 1817, and three of its synonyms: Umbrella Lamarck, 1819, Gastroplax Blainville, 1819, and Ombrella Ferussac, 1822. The type species of Umbraculum is U. chinense and the specific name should be attributed to Lamarck, 1801 (who called it Umbella chinensis). This species is a junior synonym of Patella umbraculum [Lightfoot, 1786], a name introduced in an anonymous work. The neuter gender of Umbraculum must be reflected in the names of attributed species. Rafinesque s descriptions of his genera Tylodina and Oxynoe are reproduced from his 1814 work. In the interests of nomenclatural stability, it is recommended that Umbraculoidea be accorded the status of nomen protectum (in favour of Tylodinoidea) for the monophyletic higher taxon (with the rank of superfamily in a Linnaean hierarchy) encompassing the families Umbraculidae and Tylodinidae. 7 pp., 4.…

As the Latin word urceus is a simple noun in apposition, the original spelling of the specific epithet derived directly from it must be retained (as urceus) in the future, regardless of the gender of the genus with which it is combined (International Code of Zoological Nomenclature 1999, Article 31.2.1). The name microurceus is herein deemed to be a correct original spelling because it is in prevailing usage, and it must be retained with the original author and date (i.e. Kira, 1959) in future, regardless of the gender of the genus with which it is combined (International Code of Zoological Nomenclature 1999, Article 33.3.1). 5 pp., 2 figs, gr. 8.…

Calliostoma bellatrix n. sp. is described from depths of 250 to 400 metres depth in the seaway between northern Australia and the southern Indonesian archipelago, and extending into the eastern Indian Ocean. Its smooth shell, with flat sides to the whorls and an acutely angled periphery ornamented with a double nodulose keel, render it unique among Indo-Pacific calliostomes, and it may be the sister species to C. schroederi Clench and Aguayo from similar depths in the Caribbean Sea. Both C. bellatrix and C. schroederi clearly belong within the subgenus Ampullotrochus Monterosato. 6 pp., 2 figs, 4.…

8 pp., 4 figs, 4.

3 pp., 7 figs, 4.

17 pp., 44 figs, 4.

Soft cover. , 416 figs, 4to, paperbound 0.0.

New taxa: Flabellina riwo n. sp., Flabellina nilas n. sp., Flabellina rubropurpurata n. sp., Flabellina exoptata n. sp., Flabellina delicata n. sp. 37 pp., 26 figs, 4.

Soft cover. Library stamp, good secondhand copy 0.0.