''Borophryne apogon'', the netdevil or greedy seadevil, is a species of leftvent anglerfish known today from the waters of the eastern

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...

off the

Central America Central America is a subregion of North America. Its political boundaries are defined as bordering Mexico to the north, Colombia to the southeast, the Caribbean to the east, and the Pacific Ocean to the southwest. Central America is usually ...

n coast. It is found at depths down to around . This species grows to a length of TL. A fossil specimen of this species has been found in the

Los Angeles Basin The Los Angeles Basin is a sedimentary Structural basin, basin located in Southern California, in a region known as the Peninsular Ranges. The basin is also connected to an wikt:anomalous, anomalous group of east–west trending chains of mountai ...

dating back to the

Late Miocene The Late Miocene (also known as Upper Miocene) is a sub-epoch of the Miocene epoch (geology), Epoch made up of two faunal stage, stages. The Tortonian and Messinian stages comprise the Late Miocene sub-epoch, which lasted from 11.63 Ma (million ye ...

, some eight million years ago.

Taxonomy

''Borophryne'' was first proposed as a

monospecific genus In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispe ...

in 1925 by the English

ichthyologist Ichthyology is the branch of zoology devoted to the study of fish, including bony fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). According to FishBase, 35,800 species of fish had been described as of March 2 ...

Charles Tate Regan Charles Tate Regan (1 February 1878 – 12 January 1943) was a British ichthyology, ichthyologist, working mainly around the beginning of the 20th century. He did extensive work on fish classification schemes. Born in Sherborne, Dorset, he was ...

when he described ''B. apogon'' as a new species. The

holotype A holotype (Latin: ''holotypus'') is a single physical example (or illustration) of an organism used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of s ...

was collected by the Danish research vessel '' Dana'' and the type locality was given as the

Gulf of Panama The Gulf of Panama () is a gulf of the Pacific Ocean off the southern coast of Panama, where most of eastern Panama's southern shores adjoin it. The Gulf has a maximum width of , a maximum depth of and the size of . The Panama Canal connects the ...

at 7°15'N, 78°54'W from a depth of around . The 5th edition of ''

Fishes of the World ''Fishes of the World'' is a standard reference for the systematics of fishes. It was first written in 1976 by the American ichthyologist Joseph S. Nelson (1937–2011). Now in its fifth edition (2016), the work is a comprehensive overview of t ...

'' classifies this taxon in the family Linophrynidae, within the

suborder Order () is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between family and class. In biological classification, the order is a taxonomic rank used in the classification of organisms and recognized ...

Ceratioidei Ceratioidei, the deep-sea anglerfishes or pelagic anglerfishes, is a suborder of marine ray-finned fishes, one of five suborders in the order Lophiiformes, the anglerfishes. These fishes are found in tropical and temperate seas throughout the wor ...

, the deep sea anglerfishes, of the

anglerfish The anglerfish are ray-finned fish in the order Lophiiformes (). Both the order's common name, common and scientific name comes from the characteristic mode of predation, in which a modified dorsal Fish fin#Ray-fins, fin ray acts as a Aggressiv ...

order Order, ORDER or Orders may refer to: * A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica * Categorization, the process in which ideas and objects are recognized, differentiated, and understood ...

Lophiiformes The anglerfish are ray-finned fish in the order Lophiiformes (). Both the order's common and scientific name comes from the characteristic mode of predation, in which a modified dorsal fin ray acts as a lure for prey (akin to a human angler, ...

Etymology

''Borophryne'' is a combination of ''boros'' and ''phryne''. ''Boros'' means "greedy" or "gluttonous", Regan did not explain this what this alluded to but it may be to the very large head of this anglerfish. ''Phryne'', which means "toad", is commonly used in the names of anglerfish genera. Its use may date as far back as

Aristotle Aristotle (; 384–322 BC) was an Ancient Greek philosophy, Ancient Greek philosopher and polymath. His writings cover a broad range of subjects spanning the natural sciences, philosophy, linguistics, economics, politics, psychology, a ...

and

Cicero Marcus Tullius Cicero ( ; ; 3 January 106 BC – 7 December 43 BC) was a Roman statesman, lawyer, scholar, philosopher, orator, writer and Academic skeptic, who tried to uphold optimate principles during the political crises tha ...

, who referred to anglerfishes as "fishing-frogs" and "sea-frogs", respectively, possibly because of their resemblance to frogs and toads. The

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

, ''apogon'', means "without a beard" an allusion to the lack of a hyoid barbel, which is present in the leftvent genus '' Linophryne''.

Description

metamorphosed Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock (protolith) is subjected to temperatures greater than and, often, elevated pressure of or more, causi ...

female ''Borophryne apogon'' is globose, and grows to a maximum length of about . The depth of the head is between 50% and 65% of the fish's standard length and the length of the head is between 50% and 60% of the standard length, with the lower jaw being four fifths of the length of the head. Three rows of long, sharp teeth line the jaws and there are up to four teeth on the roof of the mouth. The

illicium ''Illicium'' is a genus of flowering plants treated as part of the family Schisandraceae,

on the snout is short and the

esca Esca can refer to: * The esca or illicium, a modified luminescent fin ray found in anglerfish * Esca (grape disease) * the Ezka, a river in the Basque country known as "Esca" in Spanish * ESCA or Electron Spectroscopy for Chemical Analysis, now ...

on its tip is large with a branching terminal appendage and filaments on the side. There is a rounded protuberance on the forehead, the sphenotic spines (above the eyes) are large in young specimens but become overgrown with skin in older ones, and there is a symphysial spine at the tip of the jaw. The caudal peduncle is particularly short. The head and body are dark reddish-brown, or completely black, and the fins are usually colorless. The dorsal fin and the anal fin both have three soft rays, while the pectoral fins have fifteen to eighteen rays each, and the caudal fin has nine. This anglerfish is similar in appearance to '' Linophryne'', but lacks the

barbel Barbel may refer to: *Barbel (anatomy), a whisker-like organ near the mouth found in some fish (notably catfish, loaches and cyprinids) and turtles *Barbel (fish), a common name for certain species of fish **''Barbus barbus'', a species of cyprini ...

on the chin. A free-living metamorphosed male grows to a length of about . It differs from other leftvent anglerfish in having no

premaxilla The premaxilla (or praemaxilla) is one of a pair of small cranial bones at the very tip of the upper jaw of many animals, usually, but not always, bearing teeth. In humans, they are fused with the maxilla. The "premaxilla" of therian mammals h ...

e and having large sphenotic spines. The jaws bear no teeth, but there are up to six or seven strong, short

placoid scales A fish scale is a small rigid plate that grows out of the skin of a fish. The skin of most jawed fishes is covered with these protective scale (zoology), scales, which can also provide effective Underwater camouflage, camouflage through the us ...

above and below the mouth which meet when the jaws are closed. The olfactory organs are large and unpigmented, but the rest of the head and body is lightly pigmented and pale brown.

Distribution

This species is found only in the tropical eastern Pacific. Its range extends from the lower

Gulf of California The Gulf of California (), also known as the Sea of Cortés (''Mar de Cortés'') or Sea of Cortez, or less commonly as the Vermilion Sea (''Mar Vermejo''), is a marginal sea of the Pacific Ocean that separates the Baja California peninsula from ...

to the

, in an area delineated by 29°N to 7°N and 113°W to 78°W. It is a deep water fish and has been found in the

bathypelagic zone The bathypelagic zone or bathyal zone (from Greek βαθύς (bathýs), deep) is the part of the open ocean that extends from a depth of below the ocean surface. It lies between the mesopelagic above and the abyssopelagic below. The bathypela ...

at depths down to about .

Evolution

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 preserve ...

of ''Borophryne apogon'' and one of the closely related headlight angler (''Linophryne indica'') were found in

laminated deposits in the eastern sector of the

Puente Formation The Puente Formation is a Formation (geology), geologic formation in California. It preserves fossils dating back to the middle to upper Miocene epoch of the Neogene Period (geology), period, most of which were deposited in a deepwater environment ...

, California, during construction of a metro line subway station in

Los Angeles Los Angeles, often referred to by its initials L.A., is the List of municipalities in California, most populous city in the U.S. state of California, and the commercial, Financial District, Los Angeles, financial, and Culture of Los Angeles, ...

. The assemblage of anglerfish included several other extant species of anglerfish.

Biology

When a free-living male ''B. apogon'' encounters a female he latches onto her belly with his mouth and their tissues gradually fuse, with the male becoming parasitic. Free-living males and unparasitised females never have fully developed gonads, but after fusion, the male's gonads enlarge and he continues to grow, the largest known parasitic male being about long.

References

{{Taxonbar, from=Q2517937 Linophrynidae Marine fish of Nicaragua Taxa named by Charles Tate Regan Fish described in 1925 Monotypic ray-finned fish genera