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Curiosities of Biological Nomenclature
Mark Isaak       specimen@curioustaxonomy.net
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Wordplay: Tautonyms

Tautonyms, composed of two identical words (e.g., Vulpes vulpes, the red fox), are too common to list all of them. See Long, Samuel S., 1996, Tautonyms in Biology, Word Ways 29(3): 146-150, 29(4): 253-257.

Loa loa (a nematode) - shortest tautonym.
Coccothraustes coccothraustes (hawfinch) and
Xanthocephalus xanthocephalus (yellow-headed blackbird) - longest tautonyms.
Bufo bufo bufo (European toad),
Naja naja naja (Sri Lankan cobra) - shortest trinomials.
Crossoptilon crossoptilon crossoptilon (Szechuan white eared pheasant) - longest trinomial

Other species are notable as three-way near misses; both parts of the binomial and the common name differ slightly:

Babyrousa babyrussa (babirusa, a wild pig)
Suricata suricatta (suricate or meerkat, a south African mongoose)

Of more interest are those cases where the genus and species mean the same thing in two languages:

Anous stolidus (brown noddy) Greek/Latin: "stupid"
Arctostaphylos uva-ursi (bearberry) Gk/La: "berry-of-bear"
Ardea herodias (great blue heron) La/Gk: "heron"
Asio otus (long-eared owl) La/Gk: "horned owl"
Asterolinon linum-stellatum (Primulaceae) Gk: "star flax"/La: "flax star"
Brachyramphus brevirostris (Killitz's murrelet) Gk/La: "short beak"
Cygnus olor (mute swan) Gk/La: "swan"
Diceros bicornis (black rhino) Gk/La: "two horns"
Equus caballus (horse) La/Gallic: "horse, nag"
Megaceryle alcyon (belted kingfisher) Gk/La: "big kingfisher kingfisher"; it has also been known by the fully tautonymous synonym Ceryle alcyon.
Melanitta nigra (common scoter) Gk/La: "black duck black"
Pogona barbata (bearded lizard) Gk/La: "beard"
Tayassu tajacu (peccary) Spanish and Portugese transcriptions of the Guarani "tajasu", peccary
Tetracerus quadricornis (Blainville, 1816) (four-horned antelope) Gr/La: "four-horned four-horn"
Toxotes jaculatrix (archerfish) Gk/La: "dart-shooter"
Tragopan satyra (Himalayan pheasant) Pan and satyrs are commonly represented with legs of goats; "trago-" is Greek for goat.
Upupa epops Linnaeus, 1758 (hoopoe) in Latin and Greek, respectively.
Ursus arctos (brown bear) La/Gk: "bear"
Xiphias gladius (swordfish) Gk/La: "sword"

Equisetum Subg. Hippochaete (J. Milde) Baker (horsetail) La/Gk: "horse bristle"
Finally, these pairs of species deserves note:

Lonicera caprifolium and L. tragophylla (Caprifoliaceae, honeysuckles) Both specific epithets mean "goat leaf," in Latin and Greek respectively.
Rhinolophus ferrumequinum (greater horseshoe bat) and R. hipposideros (lesser horseshoe bat). "Ferrumequinum" means horseshoe in Latin; "hipposideros" means the same in Greek.

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