Jamaican ibis Temporal range: Early Holocene | |
---|---|
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Pelecaniformes |
Family: | Threskiornithidae |
Genus: | † Xenicibis Olson & Steadman, 1977 |
Species: | †X. xympithecus |
Binomial name | |
†Xenicibis xympithecus | |
Former range (in red) |
The Jamaican ibis, Jamaican flightless ibis [1] or clubbed-wing ibis [2] (Xenicibis xympithecus) is an extinct bird species of the ibis subfamily uniquely characterized by its club-like wings. [3] It is the only species in the genus Xenicibis, [1] and one of only two flightless ibis genera, [2] [3] the other being the genus Apteribis which was endemic to Hawaii's islands of Maui Nui. [2] [4]
The species was first described in 1977 based on postcranial bone elements excavated in a cave deposit at Long Mile Cave, Jamaica, by H. E. Anthony in 1919–20. [1] [5] At the time, it was presumed to be flightless based on the incomplete coracoid; [1] its flightlessness was confirmed after a humerus of the same species was found in the Swansea Cave, Jamaica. [5] [6] New fossil finds from two locations, including the Red Hills Fissure, show that the bird has a unique modification of the carpometacarpus, rendering it club-like. [3] The metacarpal is enlarged and bowed distally with thickened walls, while the ulna and radius have been modified as well. From its maximum femur diameter of 8.7 mm, it has been estimated that the Jamaican Ibis weighed about 2 kg (70 oz). [3]
Ornithologists speculate that the wings were used as weapons, in the manner of a club or flail, [3] similar to the adaptations found in some mantis shrimps (Stomatopoda: Gonodactyloidea) that possess a club-like distally inflated dactyl used to strike prey and other shrimps. [7] Among birds, this adaption seems unique. [3] In birds, adaptations of the wing that are advantageous in the context of fighting represent an example of contingency in which species find different solutions to the same problem as a result of random variations. [3] [8]
The Jamaican ibis was endemic to Jamaica. Bones have been excavated from several caves, including the Long Mile Cave, [1] the Swansea Cave, [6] the Jackson's Bay Cave [9] and the Red Hills Fissure. [3] Bones from Cuba claimed to be of this genus [10] were later identified as those of a limpkin. Jamaica and Cuba have never been linked, so it is improbable that a flightless species could reach a different island. [5]
The ibis are a group of long-legged wading birds in the family Threskiornithidae that inhabit wetlands, forests and plains. "Ibis" derives from the Latin and Ancient Greek word for this group of birds. It also occurs in the scientific name of the western cattle egret mistakenly identified in 1757 as being the sacred ibis.
Ciconia is a genus of birds in the stork family. Six of the seven living species occur in the Old World, but the maguari stork has a South American range. In addition, fossils suggest that Ciconia storks were somewhat more common in the tropical Americas in prehistoric times.
The St. Croix macaw or Puerto Rican macaw, is an extinct species of macaw whose remains have been found on the Caribbean islands of St. Croix and Puerto Rico. It was described in 1937 based on a tibiotarsus leg bone unearthed from a kitchen midden at a pre-Columbian site on St. Croix. A second specimen consisting of various bones from a similar site on Puerto Rico was described in 2008, while a coracoid from Montserrat may belong to this or another extinct species of macaw. The St. Croix macaw is one of 13 extinct macaw species that have been proposed to have lived on the Caribbean islands. Macaws were frequently transported long distances by humans in prehistoric and historical times, so it is impossible to know whether species known only from bones or accounts were native or imported.
Caracara is a genus in the family Falconidae and the subfamily Polyborinae. It contains one extant species, the crested caracara; and one extinct species, the Guadalupe caracara. The South American Classification Committee of the American Ornithological Society has voted to again merge the two, retaining C. plancus as crested caracara. The taxonomists of the International Ornithologists' Union have also merged them.
Paleontology or palaeontology is the study of prehistoric life forms on Earth through the examination of plant and animal fossils. This includes the study of body fossils, tracks (ichnites), burrows, cast-off parts, fossilised feces (coprolites), palynomorphs and chemical residues. Because humans have encountered fossils for millennia, paleontology has a long history both before and after becoming formalized as a science. This article records significant discoveries and events related to paleontology that occurred or were published in the year 1985.
Paleontology or palaeontology is the study of prehistoric life forms on Earth through the examination of plant and animal fossils. This includes the study of body fossils, tracks (ichnites), burrows, cast-off parts, fossilised feces (coprolites), palynomorphs and chemical residues. Because humans have encountered fossils for millennia, paleontology has a long history both before and after becoming formalized as a science. This article records significant discoveries and events related to paleontology that occurred or were published in the year 1977.
Paleontology or palaeontology is the study of prehistoric life forms on Earth through the examination of plant and animal fossils. This includes the study of body fossils, tracks (ichnites), burrows, cast-off parts, fossilised feces (coprolites), palynomorphs and chemical residues. Because humans have encountered fossils for millennia, paleontology has a long history both before and after becoming formalized as a science. This article records significant discoveries and events related to paleontology that occurred or were published in the year 1976.
Titanohierax gloveralleni, also known as the Bahama eagle, is a large species of extinct hawk from the Late Quaternary of the Caribbean. Remains of the animal have been found on multiple islands in The Bahamas. The animal is known from a handful of bones found across multiple islands, including a tarsometatarsus, partial metacarpal, and nearly complete right ulna. The animal was described based off the former two by Alexander Wetmore in 1937, with all other currently referred material being assigned by Storrs Olson and colleagues in 1982.
The Barbados rail is a fossil rail species endemic to Barbados with an undetermined taxonomic status. It was formerly described by Pierce Brodkorb in 1965 as Fulica podagrica. However, this classification has been questioned by Storrs Olson when he described Brodkorb's material anew in 1974. It is only known by Brodkorb's holotype which consists of a humerus and several leg elements including femur, tibiotarsus and tarsometatarsus fragments. The humerus may not be specifically distinct from those of the American coot but most of the femur, tibiotarsus and tarsometarsus fragments are from a yet undescribed larger rail of an undetermined genus not related to Fulica. Olson further assumed that Brodkorb's material might be a composite of several rail species. The bone fragments were unearthed in Late Pleistocene deposits in Saint Philip Parish and Ragged Point on Barbados.
Long Mile Cave, sometimes known locally as Pick'ny Mama Cave or Hell's Gate Cave, is a palaeontological and palaeoanthropological site in the Cockpit Country of north-western Jamaica.
Apteribis is an extinct genus of flightless birds in the ibis subfamily that was endemic to the Hawaiian Islands in the Pacific Ocean.
Swansea Cave is a cave and palaeontological site in the Saint Catherine Parish of south-eastern Jamaica.
Red Hills Fissure is a palaeontological site at the Red Hills in Saint Andrew Parish of south-eastern Jamaica.
The Bermuda towhee is an extinct bird of the towhee genus Pipilo that was endemic to Bermuda.
The Cuban pauraque, also known as the Cuban poorwill, is an extinct species of nightjar from the island of Cuba in the Caribbean.
Branta rhuax, the giant Hawaiʻi goose, is an extinct goose endemic to the island of Hawaiʻi. It was initially described as the monotypic genus Geochen, but then reassigned to Branta by Storrs L. Olson in 2013 after reexamination of the subfossil material.
The Bermuda flicker is an extinct woodpecker from the genus Colaptes. It was confined to Bermuda and is known only by fossil remains dated to the Late Pleistocene and the Holocene. However, an old travel report by explorer Captain John Smith from the 17th century may also refer to this species.
Oscar Paulino Arredondo de la Mata was a Cuban paleontologist. He described a number of birds and mammals of the Quaternary Period from fossils obtained from Cuban caves. He has been called the "father of Cuban vertebrate paleontology".