Abstract
Thirteen species of the genus Labidocera Lubbock, 1853 were identified. Plankton samples collected from nine sites around coastal areas of Indonesia from 2003 to 2015. Among these species, there were three recently described species, Labidocera javaensis Mulyadi, 1997, L. muranoi Mulyadi, 1997, and L. kaimanaensis Mulyadi, 2014, three new records, L. bengalensis Krishnaswamy, 1952, L. pavo Giesbrecht, 1889 and L. sinilobata Shen & Lee, 1963, and seven previously recorded species from Indonesian waters. These species divided into five species-groups, detruncata-, kroyeri-, minuta-, pectinata- and an unassigned group, based on its morphological characters. The Labidocera detruncata-group includes the following species: L. bataviae A. Scott, 1909, L. detruncata (Dana, 1849), L. kaimanaensis Mulyadi, 2014, L. madurae A. Scott, 1909, L. pavo Giesbrecht, 1889, and L. sinilobata Shen & Lee, 1963. The Labidocera kroyeri-group includes L. kroyeri (Brady, 1883) and L. muranoi Mulyadi, 1997. The Labidocera minuta-group includes L. bengalensis Krishnaswamy, 1952 and L. minuta Giesbrecht, 1889. The Labidocera pectinata-group includes L. javaensis Mulyadi, 1997, L. papuensis Fleminger et al. 1982, and L. rotunda Mori, 1929. The unassigned group includes L. acuta (Dana, 1849) and L. laevidentata (Brady, 1883). Since the descriptions of these species groups and also species as yet unassigned to groups were often not given in sufficient detail, we provide re-descriptions of their species groups and their zoogeography in Indonesian waters, adjacent waters, and the world oceans
Highlights
The genus Labidocera was established by Lubbock [1] for the species L. darwini Lubbock, 1853, collected from off Argentina
In Indonesian waters, 15 species of Labidocera already reported [4, 711]. These species divided into five species-groups based on morphological characteristics, i.e., L. detruncata, L. kroyeri, L. minuta, L. pectinata, and an unnamed group [3, 4, 8, 10]
Among the Labidocera species discovered in this study, five species (L. acuta, L. kroyeri, L. laevidentata, L. minuta and L. pavo) distributed in all study areas (Areas A-B-C), two species (L. bengalensis and L. javaensis) are in Area A-C, one species (L. sinilobata) is only in Area A, one species (L. muranoi) is only in Area B, and four species (L. bataviae, L. detruncata, L. kaimanaensis, and L. madurae) are only in Area C, respectively (Table 2)
Summary
The genus Labidocera was established by Lubbock [1] for the species L. darwini Lubbock, 1853, collected from off Argentina. The genus is the largest in the family Pontellidae, currently accommodating 60 valid species [2], the majority of them distributed in Indo-Pacific region. Most Labidocera species restricted to waters ranging from warm-temperate to tropical. In Indonesian waters, 15 species of Labidocera already reported [4, 711]. These species divided into five species-groups based on morphological characteristics, i.e., L. detruncata, L. kroyeri, L. minuta, L. pectinata, and an unnamed group [3, 4, 8, 10]
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