Research Article |
Corresponding author: João Gil ( joaocfgil@gmail.com ) Academic editor: Christopher Glasby
© 2017 João Gil, Eijiroh Nishi.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Gil J, Nishi E (2017) Nomenclatural checklist for Acromegalomma species (Annelida, Sabellidae), a nomen novum replacement for the junior homonym Megalomma Johansson, 1926. ZooKeys 677: 131-150. https://doi.org/10.3897/zookeys.677.12030
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Acromegalomma, nomen novum, is introduced as a replacement name for the polychaete genus Megalomma Johansson, 1926 (Annelida, Sabellidae), preoccupied by Megalomma Westwood, 1842 (Insecta, Coleoptera, Carabidae). The historical background of the homonymy and a full list with 36 new combinations in the new genus are included, while two species are considered as species inquirenda.
Fan worms, polychaete, homonymy, new substitute name, nomenclature, taxonomy
The genus Megalomma (Annelida, Sabellidae) was established by
The name Megalomma was first used as a subgenus of Cicindela Linnaeus, 1758 (Insecta, Coleoptera, Carabidae) by
A second genus Megalomma was created by
In polychaetes, the name Megalomma was first used by
Quoi qu’il en soit, le nom deDasychonea pris place dans la science, et celui deBranchiommaest à peu près oublié. Je pense pourtant pouvoir ressusciter celui-ci, en tenant compte des scrupules de M. Sars, et sans proscrire le nom deDasychone. Dans son mémoire sur le genreBranchiomma, M. Kölliker décrit en outre de laDasychone Bombyx une autre espèce qu’il n’a étudiée que d’une manière très-cursive, il est vrai, dans le golfe de Naples, et qui est caractérisée par des yeux à l’extrémité des branchies. Cette espèce que j’ai retrouvée n’est point uneDasychone. Elle pourra rester dorénavant l’espèce-type du genreBranchiomma.
Hence,
Schon im Jahre 1842 kam mir in Neapel ein kleiner Kopfkiemer unter die Augen, der an seinen Kiemen 8 zusammengesetzte Sehorgane trug. Leider war es mir damals, da ich gerade mit der Verfolgung der Entwicklung der Cephalopoden beschäftigt war, nicht möglich, diese interessante Annelide, von der ich ohnehin nur Ein Individuum erhalten hatte, näher zu verfolgen, und unterliess ich es daher, etwas über dieselbe zu veröffentlichen.
Consequently, Claparède described this species as Branchiomma koellikeri [original spelling köllikeri corrected here to koellikeri according to Article 32.5.2.1 of the
Je doute à peine que cette espèce soit la même que M. Kölliker a eue sous les yeux. Elle n’est en effet point rare dans le golfe de Naples. M. Kölliker n’indique, il est vrai, que huit filaments branchiaux, tandis que j’en ai compté jusqu’à trente-deux. Mais cela peut ne tenir qu’à une différence d’âge.
This leaves little doubt that Claparède considered his new species Branchiomma koellikeri to be the same species observed previously by Kölliker from Naples and, moreover, that he proposed B. koellikeri as the type of his emendation of Kölliker’s genus with the sentence (
Apparently Claparède’s intention was simply to redefine the genus Branchiomma to restrict it to the unnamed Kölliker species (= B. koellikeri Claparède, 1869, the intended new type species of the redefined genus), as can be inferred by the fact that he wrote “GenreBranchiommaKoellkr. char. em.” (
However,
In this way,
Als
However, and as stated above, the name Megalomma Johansson, 1926 is itself preoccupied by Megalomma Westwood, 1842, and a replacement name is necessary. The name Acromegalomma, nomen novum is here proposed to accomplish this need.
1842. Westwood (p. 203): Cincidella (Megalomma) new subgenus (Insecta, Coleoptera, Carabidae), for Cicindella (Megalomma) vigilans Westwood, 1842.
1843. Lacordaire (p. 113): Megalomma raised to generic level.
1858. Kölliker (p. 537): Branchiomma new genus (Annelida, Sabellidae), for Amphitrite bombyx Dalyell, 1853 (renamed as Branchiomma dalyellii Kölliker, 1858).
1869. Claparède (p. 162–163): Branchiomma redefined (Annelida, Sabellidae), for Branchiomma koellikeri Claparède, 1869. Amphitrite bombyx Dalyell, 1853 assigned to Dasychone Sars, 1862.
1873. Smith (p. 405): Megalomma new genus (Insecta, Hymenoptera, Crabronidae), for Megalomma politum Smith, 1873, M. elegans Smith, 1873, and M. nigriceps Smith, 1873.
1906. Schulz (p. 200): Megistommum new name (Insecta, Hymenoptera, Crabronidae), replacement name for Megalomma Smith, 1873.
1926. Johansson (p. 10): Megalomma new genus (Annelida, Sabellidae), to include Branchiommasensu Claparède, 1869 (not Branchiomma Kölliker, 1858).
Present study. Acromegalomma new name (Annelida, Sabellidae), replacement name for Megalomma Johansson, 1926.
To establish the list of new combinations in Acromegalomma new name a list of valid Megalomma species was compiled based on WoRMS (
Each new combination is accompanied by the reference of the original description, synonymies, type locality of the species and remarks, when necessary. Type locality is based on the original description, except where indicated. Geolocations of type localities are derived from the original descriptions, being considered an “original geolocation” when the authors provided the coordinates, or “estimated geolocation”, when estimated using Google Earth (www.google.com/earth) from the general geographic limits described by the authors. All geolocations were converted to decimal degrees.
The whereabouts of type material of the new combinations were summarised by
While the gender of Megalomma and Acromegalomma new name is neuter, some names in Megalomma had incorrect endings and needed to be emended. Following Article 31.2 of the
Branchiomma
[not Kölliker, 1858] —
Megalomma
[junior homonym, not Westwood, 1842] —
The type species of the new genus is Branchiomma koellikeri Claparède, 1869 (junior synonym of Sabella lanigera Grube, 1846), according to recommendation 60A of the
Following his principle of basing observations and descriptions only on live organisms Édouard Claparède did not designate type material or deposit specimens in museums or collections (
The name of the new genus is composed by combining the Greek terms for acro, meaning “tip end” or “extremity of a body”, mega, meaning “big” or “large”, and the suffix –omma, a noun meaning “eye”, and referring to the big compound eyes located on the radiolar subdistal region, typical of the genus.
Neuter.
The publication date of the genus Megalomma Johansson should be considered as “1926”. It was generally accepted as being “1927” until
The genus Acromegalomma, nomen novum is represented by 36 valid species, all of them new combinations.
Sabella
acrophthalmos
Singapore (1.25°, 103.85°; estimated geolocation) or Philippines (12.22°, 121.77°; estimated geolocation).
The type locality of the species was first stated as being “probably Singapore” (“wahrscheinlich von Singapore”;
Megalomma
adriaticum
Brindisi, Italy, South Adriatic Sea (40.65°, 17.95°; original geolocation).
Branchiomma
bioculatum
West of Dry Tortugas, Straits of Florida (24.6181°, -83.0517°; original geolocation).
Megalomma
carunculata
[sic]
Punta Manzanillo, Acapulco, Guerrero, Mexican Pacific (16.842°, -99.910°; estimated geolocation).
Megalomma
cinctum
Hungtou Yu (Orchid Island), northern coastline, about 1 km east of Langtao Village, Taiwan, Pacific Ocean (22.0794°, 121.5369°; original geolocation).
Branchiomma
circumspectum
Between S. 35° W, 3.5 miles (5.6 km) and S. 43° W, 5.2 miles (8.4 km) off Brockway Point, Santa Rosa Island, Channel Islands, California, Pacific coast of the USA (34.02°, -120.22°; estimated geolocation).
Branchiomma
claparedei
Syntypes collected at the reef of Marabout (11.611°, 43.132°; estimated geolocation), at Djibouti Bay, and the “Grand Récif” (11.736°, 43.235°; estimated geolocation), Moucha Islands, both at the Gulf of Tadjoura, Gulf of Aden, Indian Ocean.
Gravier introduced the name Branchiomma claparedei as new twice, first in 1906 (
Potamilla
colorata
Laguna Beach, California, Pacific coast of the USA (33.542°, -117.786°; estimated geolocation).
Potamilla clara
Lagoon side of Carrie Bow Cay, Belize, Caribbean Sea (16.803°, -88.085°; estimated geolocation).
Megalomma
georgiense
Off Georgia, Atlantic coast of the USA (30.95°, -79.9667°; original geolocation).
Megalomma
gesae
La Herradura, Estero Jaltepeque, El Salvador, Pacific Ocean (13.303°, -88.902°; estimated geolocation).
Potamilla bioculata
Megalomma
heterops
Hutchinson Island, Florida, Atlantic Ocean (27.345°, -80.2133°; original geolocation).
Megalomma
inflata
[sic]
Southeast of Bate Bay, New South Wales, Australia (-34.0667°, 151.2167°; original geolocation).
Megalomma
interrupta
[sic]
One Tree Island, Queensland, Australia (-23.5°, 152.0833°; original geolocation).
Megalomma
jubata
[sic]
MacGillivray Reef, Lizard Island, Queensland, Australia (-14.6569°, 145.4947°; original geolocation).
Megalomma
kaikourense
Point Kean near Kaikoura, east coast of South Island, New Zealand (-42.425°, 173.715°; estimated geolocation).
Sabella
lanigera
Unknown.
Branchiomma köllikeri
The species was described based on a single specimen (T-ZMB 136) deposited at the Zoological Museum of Berlin (currently the Museum für Naturkunde Berlin), from an unknown location (
Branchiomma
lobiferum
Key West, Florida, Gulf of Mexico (24.54°, -81.80°; estimated geolocation).
Megalomma
longoventralis
[sic]
Rovinj, coastal station near the Island Banjole, Croatia, North Adriatic Sea (45.095250°, 13.619283°; original geolocation).
Megalomma
messapicum
Brindisi, Italy, Adriatic Sea (40.65°, 17.96°; estimated geolocation).
Megalomma
miyukiae
Ao Tang Khen, Phuket, Thailand, Andaman Sea (7.8185°, 98.4144°; estimated geolocation).
Sabella
modesta
Lima, Peru, Pacific Ocean (-12.07°, -77.15°; estimated geolocation).
Potamilla anophthalma
Megalomma
multioculatum
Thailand, Andaman Sea (08.5°, 98.1°; original geolocation).
Branchiomma
mushaensis
[sic]
“Grand Récif” (11.736°, 43.235°; estimated geolocation), Moucha Islands, Gulf of Tadjoura, Gulf of Aden, Indian Ocean.
As in the case of Branchiomma claparedei explained above, Gravier introduced the name Branchiomma mushaensis [sic] as new twice, first in 1906 (
Megalomma
nechamae
El Bilaiyim (= Ghor Blayim) lagoons, Sinai Peninsula, Gulf of Suez (28.55°, 33.24°; estimated geolocation).
Sabella
pacifici
Grube and Örsted in
Punta Arenas, Gulf of Nicoya, Costa Rica (9.976°, -84.852°; estimated geolocation).
Pseudopotamilla panamica
The authorship of the species is here considered as “Grube & Örsted in Grube, 1859”, according to
Megalomma
perkinsi
Cape Lookout, North Carolina, Atlantic coast of the USA (34.62°, -76.54°; estimated geolocation).
Megalomma
phyllisae
Off Townsend Point, Corner Inlet, Victoria, Australia (-38.8°, 146.55°; original geolocation).
Megalomma
pigmentum
Bahía de San Quintín, Baja California, Mexico, Pacific Ocean (30.456°, -115.958°; estimated geolocation).
Megalomma monoculata [sic]
Megalomma
pseudogesae
13 nautical miles off the coast of the Istrian Peninsula, Croatia, Gulf of Venice, Northern Adriatic Sea (45.2833°, 13.2667°; original geolocation).
Branchiomma
quadrioculatum
Aripu (= Arippu) Coral Reef, Sri Lanka, Gulf of Manaar, Indian Ocean (08.78°, 79.87°; estimated geolocation).
Branchiomma
roulei
Payta (= Paita), Peru, Pacific Ocean (-5.083°, -81.111°, estimated geolocation).
Pseudopotamilla
splendida
Kasaan Bay, center of Round Island, S. 10d W., 0.4 miles, Clarence Strait, Prince of Wales Island, Alexander Archipelago, SE Alaska, North Pacific Ocean (55.51°, -132.39°; estimated geolocation).
Pseudopotamilla anoculata
Branchiomma
suspiciens
French Pass, between D’Urville Island and north end of South Island, New Zealand (-40.922°, 173.837°; estimated geolocation).
Megalomma
trioculatum
Lagoon side of Engebi (= Enjebi) Island, Enewetak (= Eniwetok) Atoll, Ralik Chain, Marshall Islands, Pacific Ocean (11.658°, 162.235°; estimated geolocation).
Amphitrite
vesiculosa
Original type locality at Kingsbridge Estuary, Devon, England (50.263°, -03.765°; estimated geolocation). Neotype designated by
Branchiomma
vigilans
Gulf of Naples, Mediterranean Sea (40.7°, 14.3°; estimated geolocation).
Branchiomma vigilans was described on the basis of three specimens from the Gulf of Naples, all of them found with their muddy tubes inserted among the dorsal chaetae of individuals of Aphrodita aculeata Linnaeus, 1758 (
The species was transferred to Megalomma by
Megalomma vigilans(Claparède, 1870) was originally found as an epibiont of the sea mouseAphrodita aculeataLinnaeus, 1758, in the Mediterranean Sea, however, no new records of this association exist. [...] In the case ofM. vigilans, the description is poor, the type is lost and there are no additional records.
The described habitat of Megalomma vigilans is unusual, and there are no references of similar cases in the family Sabellidae. It is possible that the habitat is an artefact resulting from the collection process, and that the presence of the species on individuals of Aphrodita aculeata was the consequence of the rough treatment and mixing suffered by the biological material collected by grabs and trawls, or even during the processing of the samples. So, the presence of M. vigilans on A. aculeata could be a post-collection phenomenon, and not the natural habitat of the worm. It is difficult or even impossible to know if the records by
Megalomma
pacifica
[sic]
Syntypes collected at Aranuka Island, outside the coral reef (0.14°, 173.56°; estimated geolocation), and Tapeteuea (= Tabiteuea) Island, inside the lagoon (-1.5°, 175.0°; estimated geolocation), both at Gilbert Islands, Kiribati, Pacific Ocean.
According to
The authors would like to express their deep gratitude to the generous help of Miguel Ángel Alonso Zarazaga (MNCN, Madrid, Spain), who replied to our questions concerning some nomenclatural details and corrected the endings of the specific epithets of the new combinations, so they agreed in gender with the new generic name, and Andrew S. Y. Mackie (National Museum Wales, Cardiff, UK) for having found the time to make a critical reading of the first draft of the manuscript and correct its English while on vacations. Geoff Read and María Ana Tovar-Hernández are thanked for their very detailed revisions of the first version, which have improved the manuscript considerably, and Chris Glasby for his help as Editor. This work was financially supported by the European Community's Seventh Framework Programme (FP7/2007-2013), through the Assemble Grant Agreement no. 227799-ASSEMBLE to the project “Biodiversity of AnnelidaPolychaeta in the Ria Formosa coastal lagoon: a baseline study”, awarded to J.G. and developed at the CCMAR, University of Algarve (Faro, Portugal).