SFL Educational News Service
Leafy Seadragon (Phycodurus eques)
Photo Credit: James Rosindell
(CC BY-SA 4.0)
Taxonomic Definition
Phycodurus eques, commonly known as the leafy seadragon, is a highly derived marine teleost placed within the order Syngnathiformes and the family Syngnathidae. It is the sole described member of the monotypic genus Phycodurus. This species is strictly endemic to the temperate mesophotic reefs, kelp forests, and seagrass meadows along the southern and western coasts of Australia.
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| Head of a goblin shark (Mitsukurina owstoni) Photo Credit: Dianne Bray / Museum Victoria (CC BY 3.0 AU) |
The goblin shark (Mitsukurina owstoni) is a rare, deep-water elasmobranch and the sole extant representative of the family Mitsukurinidae within the order Lamniformes (mackerel sharks). It exhibits a circumglobal, though patchily recorded, distribution in deep marine habitats, predominantly inhabiting the upper continental slopes, submarine canyons, and seamounts at depths ranging from 270 to 960 m.
Hemeroplanes triptolemus is a species of moth placed within the order Lepidoptera and the family Sphingidae. Its primary geographical range spans the Neotropical region, occurring throughout Central and South America, from Mexico down through the Amazon basin to Bolivia.
Tuatara (Sphenodon punctatus)
Photographed at Nga Manu Reserve near Waikanae.
Photo Credit: Sid Mosdell
(CC BY 2.0)
Taxonomic Definition
The tuatara (Sphenodon punctatus) is a rare, medium-sized reptile endemic to New Zealand and represents the sole extant member of the order Rhynchocephalia. It is placed within the family Sphenodontidae, representing an ancient evolutionary lineage entirely distinct from the squamates (lizards and snakes). Its contemporary geographical range is highly restricted to a few dozen isolated, predator-free offshore islands, though historical fossil evidence indicates a prior distribution across the New Zealand mainland.
Gharial (Gavialis gangeticus) male, India
Photo Credit: Charles J. Sharp
(CC BY-SA 4.0)
Taxonomic Definition
The gharial (Gavialis gangeticus) is a critically endangered crocodilian belonging to the family Gavialidae and the order Crocodilia. It represents the only surviving species within the genus Gavialis. The primary geographical range of this species is highly restricted to the northern Indian subcontinent, specifically within the river systems of the Ganges, Brahmaputra, and Mahanadi basins.
Narwhal (Monodon monoceros)
Photo Credit: Проектный офис Нарвал
(CC BY-SA 4.0)
Taxonomic Definition
The narwhal (Monodon monoceros) is a medium-sized toothed whale classified within the order Artiodactyla, infraorder Cetacea, and family Monodontidae. It is one of only two living species within its family, alongside the beluga whale (Delphinapterus leucas). This pelagic marine mammal is strictly endemic to the Arctic Ocean and adjacent waterways, with a primary geographic distribution encompassing the Canadian High Arctic, Baffin Bay, Davis Strait, and the northern waters of Greenland and Svalbard.
Megalopyge opercularis is a lepidopteran species classified within the family Megalopygidae, a group defined by their densely setose morphology. The species is predominantly distributed across the southern and southeastern United States, extending southward into Mexico and northern regions of Central America. As a holometabolous insect, it transitions from a highly defended, venomous larval stage to a functionally distinct adult moth adapted for short-lived reproduction.
ʻiʻiwi (Drepanis coccinea)
Photo Credit: Scientific Frontline / stock image
Taxonomic Definition
The ʻiʻiwi (Drepanis coccinea) is a highly specialized nectarivorous passerine placed within the family Fringillidae, the subfamily Carduelinae, and the Hawaiian honeycreeper tribe Drepanidini. It is strictly endemic to the Hawaiian archipelago, with its primary extant geographical range now restricted to high-elevation mesic and wet forests on the islands of Hawaiʻi, Maui, and Kauaʻi due to disease pressures at lower altitudinal gradients.
The pink fairy armadillo (Chlamyphorus truncatus) is a highly specialized, fossorial mammal belonging to the family Chlamyphoridae and the order Cingulata. As the smallest extant armadillo, it represents one of only two surviving species within the subfamily Chlamyphorinae. The species is entirely endemic to the arid, sandy plains, and scrublands of central Argentina.
Japanese Spider Crab (Macrocheira kaempferi)
Photo Credit: Eric Kilby
(CC BY-SA 2.0)
Taxonomic Definition
The Japanese spider crab (Macrocheira kaempferi) is a massive marine benthic decapod recently reclassified into its own distinct monotypic family, Macrocheiridae, diverging from the families Inachidae and Majidae based on larval and genetic analyses. It is endemic to the Pacific Ocean around the coast of Japan, typically inhabiting sandy and rocky substrates at depths ranging from 50 to 500 meters. As the largest living arthropod by leg span, it represents a unique evolutionary trajectory of extreme allometric growth within marine crustaceans.
Hoatzin (Opisthocomus hoazin)
Photo Credit: Charles J. Sharp
(CC BY-SA 4.0)
Taxonomic Definition
Opisthocomus hoazin is the sole extant representative of the family Opisthocomidae and the monotypic order Opisthocomiformes. It is a highly specialized, arboreal folivorous bird endemic to the riparian zones, freshwater swamps, and mangroves of the Amazon and Orinoco river basins in South America.
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| Vampire Squid (Vampyroteuthis infernalis) Image Credit: Scientific Frontline / AI generated |
Vampyroteuthis infernalis is a marine cephalopod representing the sole extant member of the order Vampyromorphida and the family Vampyroteuthidae. It is phylogenetically positioned as a sister group to the order Octopoda within the superorder Octopodiformes. The species occupies a circumglobal range, primarily restricted to the meso- and bathypelagic zones of temperate and tropical oceans, specifically within the oxygen minimum zone (OMZ).
Fossa (Cryptoprocta ferox)
Photo Credit: Ran Kirlian
(CC BY-SA 4.0)
Taxonomic Definition
The fossa (Cryptoprocta ferox) is a carnivorous mammal endemic to Madagascar, classified within the family Eupleridae and the mammalian order Carnivora. It represents the largest extant mammalian apex predator on the island, occupying a diverse range of forested habitats from coastal lowlands to high-altitude mountainous regions.
Bare-hearted Glass Frog (Hyalinobatrachium dianae)adult male.
Image Credit: Brian Kubicki Zootaxa 2015 et al.
Taxonomic Definition
Hyalinobatrachium dianae, formally described in 2015, is a neotropical amphibian classified within the order Anura and the family Centrolenidae. The species is endemic to the Caribbean foothills of Costa Rica, specifically restricted to the premontane wet forests of the Talamanca mountains. Its taxonomic defining feature is a completely transparent ventral parietal peritoneum, which leaves the internal viscera entirely visible from the ventral plane.
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| Blue Dragon Sea Slug (Glaucus atlanticus) Photo Credit: Sylke Rohrlach (CC BY-SA 2.0) |
Glaucus atlanticus is a species of small, pelagic aeolid nudibranch classified within the family Glaucidae and the order Nudibranchia. As an obligate neustonic organism, this species is globally distributed throughout the circumtropical and temperate oceans, primarily occupying the epipelagic zone where it floats inverted at the air-water interface.
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| Axolotl (Ambystoma mexicanum) Photo Credit: LoKiLeCh (CC BY-SA 3.0) |
The axolotl (Ambystoma mexicanum) is a paedomorphic amphibian belonging to the family Ambystomatidae within the order Urodela (Caudata). Historically distributed throughout the high-altitude lakes of the Valley of Mexico, its natural geographic range is currently restricted to the highly modified canal system and wetland remnants of Lake Xochimilco in southern Mexico City.
Tasmanian devil (Sarcophilus harrisii)
Photo Credit: JJ Harrison
(CC BY-SA 3.0)
Taxonomic Definition
The Tasmanian devil (Sarcophilus harrisii) is a carnivorous marsupial belonging to the family Dasyuridae within the order Dasyuromorphia. It represents the largest extant carnivorous marsupial globally following the extinction of the thylacine (Thylacinus cynocephalus). Historically distributed across the Australian mainland, its current natural geographic range is strictly endemic to the island state of Tasmania.
The American woodcock (Scolopax minor)
Photo Credit: Rhododendrites
(CC BY-SA 4.0)
Taxonomic Definition
The American woodcock (Scolopax minor) is a species of wading bird classified within the family Scolopacidae and the order Charadriiformes. Despite its taxonomic placement among shorebirds, it is primarily an upland species endemic to the eastern half of North America. Its geographical range spans from the boreal forests of southern Canada to the Gulf Coast of the United States, predominantly occupying early successional habitats, young forests, and moist woodlands.
Sandhill Cranes (Antigone canadensis)
Photo Credit: Frank Schulenburg
(CC BY-SA 4.0)
Taxonomic Definition
Antigone canadensis is a large, terrestrial avian species belonging to the family Gruidae within the order Gruiformes. While historically classified under the genus Grus, comprehensive molecular DNA analyses revealed a distinct evolutionary clade, prompting its reclassification into the genus Antigone alongside species such as the Sarus and White-naped Cranes. The species maintains a vast geographical distribution across North America, with breeding populations extending into northeastern Siberia and isolated, non-migratory populations situated in the southeastern United States and Cuba.
Wild red-tailed bumblebees (Bombus lapidarius)
Left queen | Right drone
Photo Credit: Ivar Leidus
Changes made: Combined images
(CC BY-SA 4.0)
Taxonomic Definition
Bombus lapidarius is a species of eusocial bumblebee classified within the order Hymenoptera, the family Apidae, and the subgenus Melanobombus. Its primary geographical range encompasses the Palearctic realm, widely distributed across temperate regions of Europe and extending into Western Asia and parts of Northern Africa.
This artistic, microscopic visualization illustrates glowing oxaloacetate molecules (gold) interacting with and re-energizing fatigued mitoc...
