Loading...
Please wait, while we are loading the content...
Similar Documents
Two Species of Hornellia (Subgenus Metaceradocus) from the Florida Keys and Belize (Amphipoda, Melphidippoidea)
| Content Provider | Semantic Scholar |
|---|---|
| Author | Thomas, James D. Barnard, J. Laurens |
| Copyright Year | 1986 |
| Abstract | Hornellia (Metaceradocus) at/anticus, a new species from Belize, related to M. occidentalis, an eastern Pacific species, is reported from the Caribbean Sea and a morphologically remote new species, M. tequestae, is described from the Florida Keys. Two new species of Hornel/ia (Metaceradocus) from Belize and the Florida Keys are described. These are the first records of the genus and subgenus from the western Atlantic Ocean. One species, M. at/anticus, is very close to the Californian M. occidenta/is but the other new species, M. tequestae, is much more remote as seen in couplet eight of the key. Types and materials are deposited in the Crustacea Division, Smithsonian Institution (denoted as USNM). To justify description of new species, we present a key to both subgenera Metaceradocus and Hornellia and list the species of those subgenera. KEy TO THE SPECIES OF THE SUBGENERA METACERADOCUS AND HORNELLIA la. Uropod 3 with article 2 on outer ramus (Hornel/ia) _ _.._ _ 2 lb. Uropod 3 lacking article 2 on outer ramus (Metaceradocus) _ _.._ _ _ _ _ •. 3 2a. Head with anteroventral cusp, epimeron 3 with small tooth, telson with medial spines . ...... _._.._ _.._.._ _.__.._ _ _ _ _.._.._ _.._ _.._.._.._ _.._.._ _.._.._ _...... H. whakatane 2b. Head lacking cusp, epimeron 3 with large tooth, medial spines on telson absent _.._ H. incerta 3a. Epimeron 3 serrate posteriorly above comer _.._.._ _.._ _ _ 4 3b. Epimeron 3 not serrate posteriorly above comer _.._ _.._ _.._ _.._ _ 7 4a. Epimeron 2 with more than 2 serrations _.._ _ M. perdentatus 4b. Epimeron 2 with 0-2 serrations _ 5 5a. Epimeron 2 with 2 serrations, coxa I with anteroventral tooth, article 2 of antenna I much longer than article I _ _ _ _ _.._ M. microamphopus 5b. Epimeron 2 smooth, coxa I lacking anteroventral tooth, article 2 of antenna I of no longer than article I _ _.._ _.._ _.._ _ _. 6 6a. Dorsal serrations of pleonite 3 even and regular ._.._ _.._ _.._.._ _.._ _ M. bidentatus 6b, Dorsal serrations of pleonite 3 uneven and of mixed sizes _ _.._.._.._ _.._.._.._ _.._..M. vesentiniae 7a. Epimeron 3 smooth _.._ _ _.._.._ _.._ _ _.._ _.._ _.._ _ _ _.._.M. inermis 7b. Epimeron 3 with posteroventral tooth _.._ _.._ _.._ _ _.._ _.._.._ 8 8a. Coxae 1-2 with anteroventral tooth, coxae 5-7 serrate, pleonite 6 lacking spines, uropod I lacking basofacial spines, telson 2f3 cleft, apices symmetrical, no basal spines _ M. tequestae 8b. Coxae 1-2 lacking anteroventral tooth, coxae 5-7 not serrate, spines present on pleonite 6, uropod I with basofacial spines, tel son fully cleft, apices asymmetrical, with basal spines 9 9a, Epimera 2-3 with small tooth _ _.._.._ _.._.._ _.._ _ M. occidentalis 9b. Epimera 2-3 with large tooth _.._ _.._ _ _.._ _.._ _ _.._ _ _ M. at/anticus List of Species in the subgenera Hornellia and Metaceradocus: M. at/anticus new species, herein, Belize; M. bidentatus Ledoyer, 1982, Madagascar; M. inermis Ledoyer, 1982, Madagascar; M. micramphopus (Stebbing, 1910), Australia; M. occidentalis J. L. Barnard, 1959, California; M. perdentatus Chevreux, 1925, Senegal; M. tequestae new species, herein, Looe Key, Florida; M. vesentiniae Ruffo, 1969, Red Sea; H. incerta Walker, 1904, Ceylon (Ledoyer, 1973; 1982) (=Tu/earogammarus peresi Ledoyer, Madagascar, 1967), also reported by: Pillai, 1957, Travencore; Ruffo, 1969, Red Sea; Olerod, 1970, Philippines. H. whakatane J. L. Barnard, 1972, New Zealand |
| Starting Page | 447 |
| Ending Page | 447 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| Volume Number | 38 |
| Alternate Webpage(s) | https://nsuworks.nova.edu/cgi/viewcontent.cgi?article=1620&context=occ_facarticles&httpsredir=1&referer= |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
