Four new species of Kinorhyncha from the Gulf of California, eastern Pacific Ocean
Por:
Cepeda, Diego, Alvarez-Castillo, Lucia, Hermoso-Salazar, Margarita, Sanchez, Nuria, Gomez, Samuel, Pardos, Fernando
Publicada:
1 ene 2019
Categoría:
Animal science and zoology
Resumen:
Several meiofaunal samples from the central and lower Gulf of California were studied. Four new species of kinorhynchs, Cristaphyes fortis sp. nov., Higginsium mazatlanensis sp. nov., Cephalorhyncha teresae sp. nov. and Echinoderes xalkutaat sp. nov., are described herein. C. fortis sp. nov. may be distinguished from its most similar congeners by its more strongly developed pachycycli and ball-and-socket joints and the presence of unpaired paradorsal setae on segments 2, 4 and 6, two pairs of ventrolateral setae on segment 5, one pair of ventrolateral setae on segments 2–4, 6–7 and 10, and one pair of ventromedial setae on segments 8–9. H. mazatlanensis sp. nov. is easily distinguished from its congeners by the combined presence of subdorsal setae only on segment 1 and lateroventral setae only on even segments. C. teresae sp. nov. is unique within the genus by the presence of acicular spines in middorsal position on segments 4, 6 and 8, in sublateral position on segment 7 and in lateroventral position on segments 8 and 9, as well as tubes in subdorsal position on segment 2, and in lateroventral position on segment 5. Moreover, this species has primary pectinate fringes of segments 2–7 bearing a tuft of elongated spinous projections in middorsal position, which is unique among its congeners. E. xalkutaat sp. nov. belongs to a group of Echinoderes characterized by possessing type 2 glandular cell outlets in subdorsal, laterodorsal, sublateral and ventrolateral positions on segment 2, together with middorsal spines on segments 4–8, lateroventral spines on segments 6–9 and lateroventral tubes on segment 5, but the arrangement of the remaining type 2 glandular cell outlets (in midlateral position on segment 5, in sublateral position on segment 8 and in laterodorsal position on segment 10) and the cuticular composition of segment 11 (one tergal and two sternal plates) allow its morphological differentiation. © 2019 Elsevier GmbH
Filiaciones:
Cepeda, Diego:
Departamento de Biodiversidad, Ecología y Evolución, Facultad de Ciencias, Biológicas, Universidad Complutense de Madrid, José Antonio Novais St. 12, Madrid, 28040, Spain
Univ Complutense Madrid, Dept Biodiversidad Ecol & Evoluc, Fac Ciencias, Biol, Jose Antonio Novais St 12, E-28040 Madrid, Spain
Alvarez-Castillo, Lucia:
Facultad de Ciencias, Universidad Nacional Autónoma de México, Circuito Exterior S/N, México, D.F. 04510, Mexico
Univ Nacl Autonoma Mexico, Fac Ciencias, Circuito Exterior S-N, Mexico City 04510, DF, Mexico
Hermoso-Salazar, Margarita:
Facultad de Ciencias, Universidad Nacional Autónoma de México, Circuito Exterior S/N, México, D.F. 04510, Mexico
Univ Nacl Autonoma Mexico, Fac Ciencias, Circuito Exterior S-N, Mexico City 04510, DF, Mexico
Sanchez, Nuria:
Departamento de Biodiversidad, Ecología y Evolución, Facultad de Ciencias, Biológicas, Universidad Complutense de Madrid, José Antonio Novais St. 12, Madrid, 28040, Spain
Laboratoire Environnement Profond, Institut Français de Recherche pour, l'Exploitation de la Mer (IFREMER), Centre Bretagne - ZI de la Pointe du Diable, CS 10070, Plouzané, 29280, France
Univ Complutense Madrid, Dept Biodiversidad Ecol & Evoluc, Fac Ciencias, Biol, Jose Antonio Novais St 12, E-28040 Madrid, Spain
Ctr Bretagne ZI Pointe Diable, Inst Francais Rech Exploitat Mer IFREMER, Lab Environm Profond, CS 10070, F-29280 Plouzane, France
Gomez, Samuel:
Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica de Mazatlán, Cap. Joel Montes Camarena, Cerro del Vigía, Mazatlán, Sin. 82040, Mexico
Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Unidad Acad Mazatlan, Mazatlan 82040, Sin, Mexico
Pardos, Fernando:
Departamento de Biodiversidad, Ecología y Evolución, Facultad de Ciencias, Biológicas, Universidad Complutense de Madrid, José Antonio Novais St. 12, Madrid, 28040, Spain
Univ Complutense Madrid, Dept Biodiversidad Ecol & Evoluc, Fac Ciencias, Biol, Jose Antonio Novais St 12, E-28040 Madrid, Spain
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