[From Introduction]
Polychaetous annelids from deep water off western Mexico were first collected by the ALBATROSS expeditions of 1886-91 and 1911. The material from these expeditions was treated by Chamberlin (1919) and Treadwell (1923). Chamberlin named a large number of new species, most of which have not been recovered from other areas and indicate the presence of a deep-water fauna characteristic of the eastern Pacific Ocean.
The Allan Hancock Foundation collected benthic organisms off western Mexico from 1932 to 1942 and during a series of cruises since 1948. These collections have been treated by Hartman and Fauchald in a number of papers. The Scripps Institution of Oceanography has had a series of cruises, especially in the Gulf of California, where benthic samples were taken. Parts of this material were treated by Parker (1964a, 1964b) in papers dealing with the benthic ecology of the gulf and adjacent areas. Parker's study was based mainly on the mollusks; the polychaetous annelids are treated here for the first time.
Two cruises with the VELERO IV of the Allan Hancock Foundation were undertaken in 1967 and 1970 to investigate further the benthic fauna off western Mexico. The material from these two expeditions forms the basis of this study, but other materials have been included as indicated below.
Forty-nine polychaetes in fourteen families were previously known from deep water off western Mexico. These are listed in Table 1 with reference to the records for each species. The present collection includes 227 species in forty-three families. Seventy-six new species are named and revisions are made of some taxa, where materials and previous investigations permitted complete surveys.
Original diagnosis by Fauchald (1972: 246): ''The thorax has ten setigers of which the first setiger has notopodial ... [details]
Original diagnosis by Fauchald (1972: 246): ''The thorax has eleven setigers with pointed setae only; the first ... [details]
Pacific Ocean: western Mexico, from Cedros Island and from Baja California, along the mainland coast to Acapulco; ... [details]
Pacific Ocean: western Mexico (off the southern tip of Baja California; Tres Marias Basin). [details]
Pacific Ocean: western Mexico (off Cedros Island; off the southern tip of Baja California Sur). [details]
Pacific Ocean: western Mexico (off Cedros Island; off the southern tip of Baja California Sur). [details]
Pacific Ocean: off Islas Tres Marias (Western Mexico). [details]
Pacific Ocean: off Isla Cedros (Baja California, Western Mexico). Known only from the type locality. [details]
Pacific Ocean: Salsipuedes Basin (Gulf of California). [details]
Pacific Ocean: central part of the Gulf of California. [details]
Pacific Ocean, Gulf of California, Mexico (from off Cabo Falso and the Tres Marias Islands through the southerm and ... [details]
Pacific Ocean: western Mexico (Baja California; Nayarit; Guerrero). [details]
Pacific Ocean: off Oregon (USA); off Cedros Island (Western Mexico). [details]
Pacific Ocean: Guaymas Basin (Gulf of California). [details]
Pacific Ocean: Mexico (Pacific coast of Baja California; Gulf of California). [details]
Not stated in the original description. The specific epithet dubia (masculine: dubius) is a Latin adjective meaning ... [details]
Not stated. The specific epithet crassicapitis is composed by the Latin adjective crassi, form of crassus and ... [details]
Not stated in the original description. The specific epithet exsilium is a Latin noun meaning 'exile' or ... [details]
Not stated in the original description. The specific epithet anoculata is composed by the feminine Latin adjective ... [details]
Not explicitly stated in the original description. The specific epithet mexicana refers to the type locality of the ... [details]
Not explicitly stated in the original description. The specific epithet mexicanus refers to the type locality of ... [details]
Not stated. The name Neonotomastus is composed by the Latin prefix neo-, meaning 'new' or 'recent', and the name of ... [details]
Not stated, unclear. The name Notodasus is composed by the prefix of Greek origin noto-, meaning 'the back', ... [details]
Not stated. The specific epithet magnus is a Latin adjective meaning 'large' or 'big', and refers presumably to the ... [details]
The specific epithet abyssalis, Latin adjective meaning 'of, pertaining to, or resembling an abyss', refers to the ... [details]
The specific epithet cinctus, Latin noun meaning 'belt', refers to the continuous ring around the body produced by ... [details]
The specific epithet cedroensis refers to the type locality of the species, located off Cedros Island (= Isla de ... [details]
The generic name Paraxionice is composed by the prefix of Greek origin para-, meaning 'close to', and the name of ... [details]
Not stated in the original description. The specific epithet artifex is a Latin noun meaning 'craftsman', and ... [details]
Fauchald explains the Piromis hospitis name as follows: "A large number of commensal hydroids are present on the ... [details]
Not stated in the original description. The specific epithet abyssalis is a Latin adjective meaning 'of or ... [details]
Muddy sediments at bathyal and abyssal depths. [details]
Type of sediment not stated, at slope depths. [details]
Type of sediment not stated, at bathyal depths. [details]
Green mud with foraminiferans, and sandy silt, at bathyal depths. [details]
Bathyal depths, type of sediment not stated. [details]
Clay, mud and rocks, at slope and bathyal depths. [details]
Deposited at the Natural History Museum of Los Angeles County, Los Angeles, USA. [details]
Deposited at the Natural History Museum of Los Angeles County, Los Angeles (LACM AHF Poly 1006). [details]
The holotype is a female with large eggs in the body cavity. [details]
Natural History Museum of Los Angeles County, Los Angeles (USA). [details]
Natural History Museum of Los Angeles County, Los Angeles (USA). [details]
11 miles, 320° T. from Punta Piedras light, Isla San Juanito, western Mexico, Pacific Ocean (21°53'00''N, ... [details]
Off Cedros Island, 29 mi. from Natividad Island light, Baja California, Mexico, Pacific Ocean (from 27º24'00''N, ... [details]
13.8 miles, 217°T from Punta Oeste, Isla Maria Magdalena, western Mexico, Pacific Ocean (21°15'00''N, ... [details]
19 miles, 170° T. from Natividad Island, Baja California Sur, western Mexico, Pacific Ocean (from 27°35'45''N, ... [details]
19 miles, 170° T. from Natividad Island, Baja California Sur, western Mexico, Pacific Ocean (from 27°35'45''N, ... [details]
273.5° T from Natividad Island light, off Isla Cedros, Baja California, Western Mexico, Pacific Ocean (27.9069°, ... [details]
5 miles, 93° T. from N end of Isla de las Animas, Western Mexico, Salsipuedes Basin, Gulf of California, Pacific ... [details]
3/4 mi. SW of Punta Arena, Carmen Island, Gulf of California, Pacific Ocean (from 25º46'00''N, 111º15'00''W to ... [details]
Pacific Ocean, Gulf of California, western Mexico, Baja California Sur, Isla San José, 33.5 miles 053ºT from ... [details]
Pacific Ocean, Gulf of California, wsetern Mexico, Baja California Sur, Cabo Falso (22º32.2'N, 109º43.0'W to ... [details]
Off Cedros Island, 26.3 mi. 273.5ºT from Natividad Island light, Baja California, Mexico, Pacific Ocean ... [details]
Guaymas Basin, Gulf of California, western Mexico, Pacific Ocean (provided geocoordinates 27°03'N, 112°18'W place ... [details]
29 miles, 180.5° T. from Isla Natividad light to Mid Pt., Baja California, Mexico, Pacific Ocean (from 27.4°, ... [details]
Holotype deposited at the Natural History Museum of Los Angeles County, Los Angeles, USA. [details]
Holotype (LACM-AHF Poly 031) deposited in the Natural History Museum of Los Angeles County, Los Angeles, USA. [details]
Natural History Museum of Los Angeles County, Los Angeles, USA (LACM-AHF POLY 1012). [details]
Holotype deposited at Natural History Museum of Los Angeles County, Los Angeles (LACM AHF POLY 1026). [details]
Holotype deposited at the Natural History Museum of Los Angeles County, Los Angeles, USA. [details]
Sphaerephesia longisetis has page precedence but Fauchald named the second species in his monograph, Sphaerephesia ... [details]