''Necatia'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of the jumping

spider Spiders ( order Araneae) are air-breathing arthropods that have eight legs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude silk. They are the largest order of arachnids and rank seventh in total species ...

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Salticidae. Its only species, ''Necatia magnidens'', is found in southern

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...

. The species is only known from a single female specimen, collected in 1872 by A. David, and described by Schenkel almost a hundred years later. Nothing more has been reported of the species since.

Description

From above, the carapace is U-shaped, slightly flared at the front. The female is slightly larger than . The posterior lateral eyes are located almost halfway along the carapace. The abdomen is longer than broad and the legs are spiny. Schenkel described the specimen as having an overall brownish black color, "which is, perhaps, not surprising for a specimen preserved for so long".

Taxonomy

Taxonomically, this genus is interesting. The name ''Davidina'' was proposed by Brignoli in 1985 as a replacement for the original name ''Davidia'', proposed by Schenkel in 1963. This was necessary according to

ICZN The International Code of Zoological Nomenclature (ICZN) is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals. It is also informally known as the ICZN Code, for its publisher, the I ...

rules, because '' Davidia'' had already been established by Hicks in 1873 as the name of a genus of Cycloconchidae,

fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...

s. However, Brignoli overlooked that in 1879, Oberthür had already named a genus of Satyrini

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References

* Brignoli, Paolo Marcello (1985). On some generic homonymies in spiders (Araneae). ''Bulletin of the British Arachnological Society'' 6: 380. * Schenkel, E. (1963). Ostasiatische Spinnen aus dem Muséum d'Histoire naturelle de Paris. ''Mémoires du Muséum national d'Histoire naturelle A'' 25: 1-481. * Sánchez, Teresa M. (1999). New Late Ordovician (Early Caradoc) Bivalves from the Sierra de Villicum (Argentine Precordillera). ''Journal of Paleontology'' 73 (1): 66-76.
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* Özdikmen, H. (2007). Nomenclatural changes for seven preoccupied Spider genera (Arachnida: Araneae). ''Munis Entomology & Zoology'' 1(2): 137-142
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{{taxonbar, from=Q1304480 monotypic Salticidae genera Salticidae spiders of China