A new cave-dwelling copepod from northeastern Thailand (Cyclopoida: Cyclopidae)

作者：Watiroyram Santi^*; Brancelj Anton; Sanoamuang La orsri

来源：Raffles Bulletin of Zoology, 2015, 63: 426-437.

• Copepoda
• groundwater
• Southeast Asia
• stygobiont
• subterranean

Bryocyclops maholarnensis, new species, is a stygobiotic copepod found in four caves in northeastern Thailand. It is described and figured hereafter. The new species shares some characteristics with those of species from the Group II sensu Lindberg (1954). However, it stands out by having the following distinctive features: no modified spine in the male P3 endopod-2; P1 with an inner basal spine but no inner coxal seta; intercoxal plate on P1-P4 with acute protuberances; a setal and spine formula of P1-P4 exopod-2: 5.5.5.4 and 3.3.3.3. It also has a reduced number of armature elements on the P4 endopod. The new species has two elements on the distal endopod in both sexes, whereas the Group II has five in females and four in males. Therefore, a new group (Group VII) is proposed for this new species. The new species can be distinguished from B. muscicola (Menzel, 1926), a closely resembling member of the Group II, by the following features: P1 without inner coxal seta; setal formula of P1-P4 distal endopod in female and male is 2.3.1.2 and 2.3.2.2, (the spine formula of P1-P4 distal endopod is 1.1.1.0 in both sexes in the new species). Additionally, the anal operculum and innermost seta on the caudal rami are shorter than those in B. muscicola.

• 出版日期2015-12-31