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  • 1
    Publication Date: 2010-12-12
    Description: Gulella (s.l.) johannae n. sp. is described from a few forest localities in the Tzaneen District, Limpopo Province, South Africa. It is characterized by a cylindrical, costulate shell with an almost entire peristome and a four-fold apertural dentition consisting of a prominent angular lamella (delimiting an only here discontinuous peristome), a mid-labral denticle, a left basal denticle, and a mid-columellar process. The shell is somewhat similar to that of G. johannesburgensis, but is consistently larger and more slender and has more whorls, while at the same time the apertural dentition is better developed; the almost uninterrupted peristome also appears to be a signifi cant character. This new taxon most likely is a restrictedrange endemic on the eastern flanks of the northern Drakensberg escarpment. Numerical data of a lot of material identified and mostly also published as G. johannesburgensis show that probably not all specimens belong to this taxon so that more than one species may be involved here.
    Keywords: Mollusca ; Gastropoda ; Pulmonata ; Streptaxidae ; Gulella, Gulella johannesburgensis ; taxonomy ; Drakensberg range ; South Africa ; 42.73
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 2
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    In:  Zoologische Mededelingen (0024-0672) vol.85 (2011) nr.13 p.849
    Publication Date: 2017-10-13
    Description: Gulella annibiodiversitatis spec. nov. is described from a few scattered localities in montane forest above c. 1300 m in southern-central Malaŵi. It is mainly characterized by a smallish (4.9-6.3 mm high), smooth and generally featureless shell without apertural dentition. Gulella menkhorsti spec. nov., has a small (2.3-2.9 mm high) and smooth shell with a six-fold dentition and is probably a restricted range endemic; so far it has only been recorded from the Mpita Forest in southern Malaŵi. A single smooth and small shell (2.7 mm) with a seven-fold apertural dentition from the Misuku Hills in northern Malaŵi also does represent a new species, Gulella crux spec. nov. Another sample from the same area, introduced as Gulella nuchalis spec. nov., has a medium-smallish (about 7.0 mm) and costulate shell with apical spiral sculpture and a six-fold apertural dentition; it is particularly characterized by what looks like an old outer labrum behind the reflected labrum.
    Keywords: Gastropoda ; Pulmonata ; Streptaxidae ; Gulella ; Malawi ; East Africa ; taxonomy
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 3
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    In:  Zoologische Mededelingen vol. 85 no. 13, pp. 849-864
    Publication Date: 2024-01-12
    Description: Gulella annibiodiversitatis spec. nov. is described from a few scattered localities in montane forest above c. 1300 m in southern-central Mala\xc5\xb5i. It is mainly characterized by a smallish (4.9-6.3 mm high), smooth and generally featureless shell without apertural dentition. Gulella menkhorsti spec. nov., has a small (2.3-2.9 mm high) and smooth shell with a six-fold dentition and is probably a restricted range endemic; so far it has only been recorded from the Mpita Forest in southern Mala\xc5\xb5i. A single smooth and small shell (2.7 mm) with a seven-fold apertural dentition from the Misuku Hills in northern Mala\xc5\xb5i also does represent a new species, Gulella crux spec. nov. Another sample from the same area, introduced as Gulella nuchalis spec. nov., has a medium-smallish (about 7.0 mm) and costulate shell with apical spiral sculpture and a six-fold apertural dentition; it is particularly characterized by what looks like an old outer labrum behind the reflected labrum.
    Keywords: Gastropoda ; Pulmonata ; Streptaxidae ; Gulella ; Malawi ; East Africa ; taxonomy
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 4
    Publication Date: 2024-01-12
    Description: \xe2\x80\x98Marconia\xe2\x80\x99 hamiltoni s.l. is known from two discrete mountainous areas in Malawi, i.e. the (southern) Mt. Mulanje complex, and the (more northern) Zomba Plateau s.l. These uplands are separated by about 65 km of lower lying land with different types of vegetation and climate. Material from these two regions may be distinguished as separate species, the southern populations having comparatively small and broad shells with some apertural dentition (\xe2\x80\x98M\xe2\x80\x99. hamiltoni, lectotype designated), while the northern populations have noticeably larger and more slender shells with a more reduced apertural dentition (\xe2\x80\x98M\xe2\x80\x99. malavensis). Discussion of the type localities for both taxa shows that these are either localized in an unlikely place (\xe2\x80\x98M\xe2\x80\x99. hamiltoni) or unclear (\xe2\x80\x98M\xe2\x80\x99. malavensis). Radula and genital anatomy of \xe2\x80\x98M\xe2\x80\x99. hamiltoni are described and depicted for the first time. Both species are ovoviviparous, a rarely reported phenomenon in the Streptaxidae. The genitalia are markedly different from what is known in various streptaxid genera with which these species may be or have been classified. In spite of the confused streptaxid taxonomy, a new genus, Austromarconia, is introduced with Ennea hamiltoni as type species.
    Keywords: Mollusca ; Gastropoda ; Pulmonata ; Streptaxidae ; Marconia ; Austromarconia gen. nov. ; taxonomy ; nomenclature ; Central Africa ; Malawi.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 5
    Publication Date: 2024-01-12
    Description: The taxonomy of the species of the terrestrial carnivorous snail family Streptaxidae of the Seychelles archipelago is reviewed with the exception of the three species of the genus Priodiscus (vide Gerlach, 1995). All 18 species are restricted to the northern, granitic islands. This paper describes 15 species, including two new genera (Silhouettia and Careoradula), and four new subspecies (Edentulina dussumieri reservae, E. d. silhouettae, E. d. praslina, Stereostele nevilli parvidentata). The nominal taxon Streptaxis (Imperturbatia) constans var. silhouettae is raised to species level to become the type species of the new genus Silhouettia. The type species of Careoradula is Streptaxis (Imperturbatia) perelegans. Anatomical descriptions and figures are provided for 13 species; the new genus Careoradula is distinct from all other streptaxids by the complete absence of a radula and associated structures. Distribution is featured on individual maps for each species. The paper concludes with a key to the shells of all species, those of Priodiscus included, and some preliminary considerations on the distribution of this group in the Seychelles archipelago.
    Keywords: Mollusca ; Gastropoda ; Pulmonata ; Streptaxidae ; Seychelles Islands ; taxonomy ; biogeography
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 6
    Publication Date: 2024-01-12
    Description: \'Achatina vassei Germain\', 1918, of which so far only the holotype is known (figured), is now recorded from Gorongosa National Park in Mozambique (Sofala Province) north of the road Beira-Mtare (Zimbabwe). The systematic position is still unclear because of the lack of anatomical data; this taxon is probably a restricted-range species centred on the plateau of Central Mozambique. A list of the terrestrial molluscs of the \xe2\x80\x98Greater Gorongosa Ecosystem\xe2\x80\x99 from the literature and specimens in the Leiden Museum is added; Curvella whytei E.A. Smith, 1899, is recorded as new for Mozambique.
    Keywords: Achatina vassei ; Greater Gorongosa Ecosystem ; Mt. Gorongosa-Gorongosa National Park ; taxonomy
    Repository Name: National Museum of Natural History, Netherlands
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  • 7
    Publication Date: 2024-01-12
    Description: Gulella streptostelopsis spec. nov. is described from a series of localities of mainly between 1000 and 1500 m a.s.l. in Malawi south of about 11\xc2\xb0S. The minute, almost smooth, shell (length 2.0-2.4 mm) resembles that of the genus Streptostele (hence the name), but is characterized by three-fold apertural dentition and just under six whorls. This taxon may represent a new genus; pending studies on the anatomy no new generic name is proposed.
    Keywords: Gastropoda ; Pulmonata ; Streptaxidae ; Gulella ; Streptostele ; taxonomy ; Malawi ; East Africa
    Repository Name: National Museum of Natural History, Netherlands
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  • 8
    Publication Date: 2024-01-12
    Description: A new species of Trachycystis s.l. (Charopidae) from the Hanglip Forest in the Soutpansberg complex in the Northern Province of South Africa is described. Absence of anatomical data precludes more precise classification. The shell is characterized by a spirally sculpted apex and a somewhat irregular flange-like costulation on the later whorls.
    Keywords: Mollusca ; Gastropoda ; Pulmonata ; Charopidae ; Trachycystis ; South Africa ; taxonomy
    Repository Name: National Museum of Natural History, Netherlands
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  • 9
    Publication Date: 2024-01-12
    Description: Born on 13 September 1931 in Rotterdam, Jacobus Theodorus [Koos] Wiebes read biology at Leiden University where he obtained his Ph.D. in 1963 on studies of Indo-Australian fig wasps. He started working on spiders (Lycosidae, Pisauridae) and beetles (Carabidae, Cetoniidae, Helodidae), but he earned his scientific reputation as a specialist in fig wasps (Hymenoptera: Agaonidae, Torymidae), their parasitoids and intricate host relationships (1961-1994: 89 papers). He served for many years on the staff of the Rijksmuseum van Natuurlijke Historie, Leiden (1955-1970, initially as assistant, later as curator of Coleoptera and as assistant director since 1965), to return as director of the newly merged national zoology and geology museums (ad interim 1982-1984, director 1984-1989). In 1970 he was appointed to the chair of Systematic Zoology and Evolutionary Biology at Leiden University, where he worked successfully until returning to the museum. Wiebes initiated studies on the lepidopteran complex of Yponomeuta species and their host plants, studying speciation in a context of ecology, taxonomy and phylogeny. Most results in this field were published in conjunction with Dr W.M. Herrebout and various (mainly Ph.D.) students. Indeed, this research project attracted a host of students and also world-wide attention. Wiebes had a talent for organization and management so that he was frequently asked to serve on various committees mainly concerned with biology on an academic level. In 1978 he was elected a member of the Koninklijke Nederlandse Akademie van Wetenschappen, Amsterdam, where he later served on various councils. His influence on the organization of biology in the universities and research councils was indeed nationwide. Health problems forced him to take early retirement in 1989, but he insisted on completing publication of his work on the fig wasps. On 6 December 1999 he died in Leiderdorp leaving a first reputation as an evolutionary biologist and a systematic entomologist.
    Keywords: Hymenoptera ; Chalcidoidea ; Agaonidae ; Torymidae ; fig wasps ; figs ; co-evolution ; Lepidoptera ; Yponomeutidae ; Yponomeuta ; ermine moths ; Coleoptera ; Carabidae ; Cetoniidae ; Helodidae ; Arachnida ; Lycosidae ; Pisauridae ; evolutionary biology ; taxonomy ; phylogeny ; ecology ; biography ; bibliography ; history of biology ; Rijksmuseum van Natuurlijke Historie/Leiden-National Museum of Natural History/Leiden
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 10
    Publication Date: 2024-01-12
    Description: Gulella meredithae spec. nov. is described from the uplands of central and northern Malawi. It belongs to what has been termed the G. browni-group (better called the G. radius-group), an assemblage of Central and East African taxa with small shells with a noticeably acute apex, with more or less smooth nepionic whorls and with marked costulation on the remaining whorls. Attention is drawn to the striking juvenile apertural dentition.
    Keywords: Gastropoda ; Pulmonata ; Streptaxidae ; Gulella ; Africa ; Malawi ; juvenile dentition ; taxonomy
    Repository Name: National Museum of Natural History, Netherlands
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