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Review of the Western Atlantic Species of Bollmannia (Teleostei: Gobiidae: Gobiosomatini) with the Description of a New Allied Genus and Species

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Review of the Western Atlantic Species of Bollmannia (Teleostei: Gobiidae: Gobiosomatini) with the Description of a New Allied Genus and Species aqua, International Journal of Ichthyology Review of the western Atlantic species of Bollmannia (Teleostei: Gobiidae: Gobiosomatini) with the description of a new allied genus and species James L. Van Tassell1*, Luke Tornabene2, Patrick L. Colin3 1) American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024-5192, U.S.A. *Corresponding author: [email protected] 2) Texas A&M University – Corpus Christi, 6300 Ocean Drive, Corpus Christi, TX 78412, U.S.A. 3) Coral Reef Research Foundation P.O. Box 1765 Koror, Palau 96940 Received: 20 May 2011 – Accepted: 30 September 2011 Abstract Résumé Bollmannia Jordan is a poorly studied group of American Bollmannia Jordan est un groupe peu étudié de gobies seven-spined gobies with representatives in the tropical américains à sept épines avec des représentants dans l’Atlan- and subtropical western Atlantic and tropical eastern Pa - tique ouest tropical et subtropical et dans le Pacifique est cific oceans. We review the taxonomy of the western tropical. Nous faisons une révision de espèces de l’Atlantique Atlantic species and provide redescriptions for the four ouest et donnons la redescription des quatre espèces recon- valid species: B. boqueronensis, B. communis, B. eigenmanni nues : B. boqueronensis, B. communis, B. eigenmanni et B. and B. litura. Bollmannia jeannae is considered to be a litura. Bollmannia jeannae est considéré comme un syn- junior synonym of B. boqueronensis. We also describe a onyme plus récent de B. boqueronensis. Nous décrivons aussi new genus and species of deep-water goby and discuss its un nouveau genre et une nouvelle espèce de gobie des eaux affinities to Bollmannia and other genera of the Micro - profondes et en discutons les affinités avec Bollmannia et gobius group of the Gobiosomatini. An identification key d’autres genres du groupe des Microgobius appartenant aux is provided for all western Atlantic members of the Micro- Gobiosomatini. Une clé de détermination est fournie pour gobius group. Results of this study highlight the need for a tous les membres de l’Atlantique ouest du groupe des Micro- combined morphological and molecular phylogenetic gobius. Les résultats de cette étude mettent en évidence la analysis to resolve the relationships among the genera of nécessité d’une analyse phylogénétique combinée, à la fois the Microgobius group. morphologique et moléculaire, pour tirer au clair les rela- tions à l’intérieur des genres du groupe Microgobius. Zusammenfassung Bollmannia Jordan ist eine kaum erforschte Gruppe Sommario amerikanischer Grundeln mit sieben Stacheln mit Il genere Bollmannia Jordan comprende un gruppo di Vertretern im tropischen und subtropischen Westatlantik ghiozzi a sette spine poco studiati che abitano le aree tropi - und im tropischen Ostpazifik. Wir überprüfen hier die Sys- ca li e subtropicali dell’Atlantico occidentale e quelle tropi- tematik der westatlantischen Arten und geben Neubeschrei- cali del Pacifico orientale. Si presenta una revisione della bungen der vier gültigen Arten: B. boqueronensis, B. commu- tas sonomia delle specie atlantiche accompagnata da una nis, B. eigenmanni und B. litura. Bollmannia jeannae wird als nuova descrizione di quattro specie valide: B. boqueronen- jüngeres Synonym zu B. boqueronensis aufgefasst. Wir be - sis, B. communis, B. eigenmanni e B. litura. Bollmannia schrei ben außerdem eine neue Gattung und Art der Tief - jeannae è da considerarsi sinonimo di B. boqueronensis. wasser-Grundeln und diskutieren ihre verwandtschaftlichen Inoltre, viene descritto un nuovo genere e una nuova specie Bezüge zu Bollmannia und anderen Gattungen der Microgo- di ghiozzo di acque profonde discutendone le affinità con bius-Gruppe der Gobiosomatini. Schließlich wird ein Bes- Bollmannia e altri generi del gruppo Microgobius della timmungsschlüssel für alle westatlantischen Angehörigen tribù Gobiosomatini. Per tutti i membri del gruppo Micro- der Microgobius-Gruppe wiedergegeben. Das Ergebnis der gobius dell’Atlantico occidentale è fornita una chiave dico- vorliegenden Untersuchung unterstreicht die Not wen - tomica. I risultati di questo studio sottolineano la necessità digkeit einer kombiniert morphologischen und molekular- di un’analisi filogenetica combinata con dati morfologici e biologischen phylogenetischen Analyse, um die Verwandt - molecolari per risolvere le relazioni di parentela tra i generi schaftsbeziehungen zwischen den Gattungen der Micro - del gruppo Microgobius. gobius-Gruppe zu klären. 61 aqua vol. 18 no. 2 - 15 April 2012 Review of the western Atlantic species of Bollmannia (Teleostei: Gobiidae: Gobiosomatini) with the description of a new allied genus and species INTRODUCTION his unpublished works Ginsburg described and Bollmannia Jordan, 1890, is one of five genera illustrated sensory papillae and head pore patterns that make up the Microgobius group of the tribe for several species of Bollmannia. We describe these Gobiosomatini (Birdsong et al. 1988; Van Tassell characters for each of the valid species in the west- & Baldwin 2004). The Gobiosomatini is a mono- ern Atlantic. phyletic group within the subfamily Gobiinae In addition to the five nominal species of western (sensu Pezold 1993; Thacker 2003; Thacker & Atlantic Bollmannia, we also address a previously Hardman 2005) and the tribe is often referred to as undescribed deepwater goby from the Caribbean. the American seven-spined gobies. Bollmannia cur- This species was originally documented as the “fil- rently comprises 14 nominal species, five of which amentous goby” by Colin (1974) and subsequently were described from the Atlantic Ocean: Bollmannia referenced by Dennis et al. (2004), where it was eigenmanni (Garman, 1896), B. boqueronensis Ever- referred to as the “sabre goby”. The molecular phy- mann & Marsh, 1899, B. jeannae Fowler, 1941, B. logenies of Rüber et al. (2003) and Rüber & Van communis Ginsburg, 1942, and B. litura Ginsburg, Tassell (unpublished, presented in 2006) suggested 1935. While attempting to identify specimens of that this species belongs within the monophyletic Bollmannia collected from Panama in 2004, several Microgobius group of the tribe Gobiosomatini, problems were noted in the descriptions of the specifically as the sister group to a monophyletic Atlantic species. The characters described for each of clade containing four species of Bollmannia. the species are not uniform across each of the Despite the apparent close relationship between descriptions. Several of the characters described as this species and Bollmannia, there are several diagnostic are of little value as these characters are prominent differences between the two in terms of commonly destroyed when Bollmannia are trawled morphology and habitat. Therefore, we describe or dredged from considerable depths. In most cases this species and place it in a new genus, Antilligob- the descriptions are based on a small number of ius, within the Microgobius group of the Gobioso- specimens and do not adequately summarize the matini. The affinities between Antilligobius n. gen. intraspecific variation seen among populations. Fur- and the allied genera Bollmannia, Akko, Parrella, thermore, there is a discrepancy between the Palatogobius and Microgobius are discussed. Identi- description of B. litura and the corresponding holo- fication keys are provided for the Atlantic species type. As a result of these issues, the validity of several of the Microgobius group of the Gobiosomatini. species is questioned. Bollmannia jeannae is not listed by Nelson et al. (2004), McEachern & Fech- METHODS helm (2005) or Murdy & Hoese (2002). Both B. Methods for counts and measurements follow jeannae and B. eigenmanni are omitted by Smith Böhlke & Robins (1968) in most regards. The last (1997). Eschmeyer (2011) lists all five nominal two elements in the second dorsal and anal fin species as valid. This paper attempts to clarify these stem from a single pterygiophore and are counted discrepancies and resolve the status of the Atlantic as a single ray. The upper and lower segmented members of the genus. caudal rays are frequently short with only one or No formal review of western Atlantic Bollmannia two striae but are stouter than adjacent procurrent has been published to this point. In an unpub- rays and are included in the counts of segmented lished master’s thesis, Bedenbough (1988) caudal rays. Counts of branched caudal rays reviewed the Pacific members of the genus. Gins- include rays with only slight terminal branching. burg addressed the genus in two incomplete, Lateral scale counts are the number of diagonal unpublished manuscripts, the drafts and notes of rows beginning with the scale above and behind which have been found at the Smithsonian Institu- the posterodorsal corner of the operculum and tion’s National Museum of Natural History. Work ending at the posterior edge of the hypural plate. on these manuscripts likely began between 1939 Transverse scale counts are the number of horizon- and 1942, as some of his notes included the east- tal scale rows counted from the origin of the sec- ern Pacific Bollmannia species described in Gins- ond dorsal fin diagonally to the origin of the anal burg (1939) but not B. communis, which he fin. Caudal peduncle scales are counted beginning described in 1942. Subsequent drafts by Ginsburg at the first full sized scale on top of the caudal contained B. communis and additional specimens peduncle immediately in front of the caudal fin, of each of the species discussed in prior drafts. In and following
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