TROPODIAPTOMUS, KIEFER 1932
Left outer branch of male fifth leg bilobed,
distal lobe circular saw-like.
121 a. Spine on segment 15 of the right first antenna
of the male absent. Se Tabel 2 . Last outer segment
of fifth leg of male usually bilobed (rarely trilobed)
with distal lobe having discernible spines.
First antenna of female reach the end of caudal
branches. Size of female 1100 μm only. Prefered
foodsources in Lake Lanao are diatoms. Predated upon by
Chaoborus. Planktonic and endemic in Mindanao. Rare.
- Lake Lanao.
Tropodiaptomus gigantoviger, (BREHM, 1933)
[1933a, 1937b (with map), 1937e, 1941a, 1969,
121 b. Spine on segment 15 present. Both lobes on last
outer segment of the fifth leg of male with discernible
spines. First antenna of female short, seldom reaching
caudal branches. Size of female more than 1100 μm
(AUSTRALIS GROUP)............................................122
122 a. Spines on segment 13, 15, 11, 10 and 12 (in descending
order of spine length) on right male first antenna.
Size of female 1900 μm. Planktonic and littoral, often
with epibionts. T. prasinus is considered to be the same
as T. vicinus, see 123b, which were found instead by
Lai et al. (1979). Distribution limited to Mindanao
and vicinity (Mamaril 1986a) and is the main species
of Tropodiaptomus in Southern parts of the Philippines
(Lai et al., 1979a). Rare.
- Lake Lanao, Lake Buhi
Tropodiaptomus vicinus, (KIEFER, 1930)
(syn. T. prasinus KIEFER, 1933)
[1933a, 1934b, 1937b, 1937e, 1941a:(prasinus),
1978a+b, 1979a+b]
122 b. Spine on 12th segment of right male first antenna absent.......................................................123
123 a. Spines on the proximal lobe of left outer segment
of the male fifth leg several times larger than
the spines on distal 1obe. Cephalothorax 10801220 μm.
Abundant in Northern Philippines (Lai et al., 1979a).
In ponds, lakes and ricefields. Can co-occur with
Filipinodiaptomus insulanus (Mamaril and Fernando,1978b).
Common.
- La Mesa Dam (Figures 123a1, 123a2), Paoay Lake.
Tropodiaptomus australis, (KIEFER, 1936)
[1978a+b, 1979a, 1986a, 2008b]
T. australis (Photo: Rey Donne S. Papa, 2007)
123 b. Spines on both lobes of about the same size.
Cephalothorax 880-900 μm. Southern distribution.
T. prasinus is considered to be the same as T. vicinus
(Lai et al, 1979a, Augustus C. Mamaril,
personal communication). Rare.
- Lake Lanao
Tropodiaptomus vicinus, (KIEFER, 1933)
(syn. Diaptomus vicinus, KIEFER, 1933)
[1978a+b, 1979a, 1986a, 2001a, 2008e, 2011c]
Tabel 2 Spines on 1st antenna of male Tropodiatomus.
Species
Spines on 1st antenna
10
11
12
13
15
T. gigantoviger
121a
small
small
absent
big
absent
T. prasinus
122a
small
small
small
big
big
T. vicinus
123b
small or absent
small
absent
big
big
T. australis
123a
small
small
absent
big
big
To 124a
