Map 2 issued from : T.C. Walter in Bull. Mar. Sc., 1989, 45 (3). [p.625, Fig.18].
Map of American continents showing the zoogeography of Pseudodiaptomus species.

Map 3 issued from : T.E. Bowman in Crustaceana, 1978, 35 (3). [p.251, Fig.2].
Known distribution if P. acutus.
Nota: Because the coastal and estuarine plankton of northern South America and the Caribbean Islands is inadequately known, it cannot be concluded that the Jamaican population is disjunct. Its presence could be explained by the prevailing current pattern; the northwestern flow of surface water along the northeastern coast of South America is joined near Trinidad by a branch of the North Equatorial Current and continues its northwesterly movement as the Caribbean Current towards the Yucatan Channel. The species could be carried to Jamaica by the clockwise eddy south of Cuba. But there are difficulties with the current-transport hypothesis; whereas the naupliar and copepodite 1 are truly planktonic, the adults are not, but settle on or near the bottom during the day where they are able to attach firmly to substrata. This formis adapted for life in rather shallow water. Another difficulty is the time involved; at 30 miles/day, about 80 days would be required for direct transport from Para (Brazil) to Jamaica; this is a long time for a copepod with a generation of about 25 days and a life span of about 50 days (Jacobs, 1961). A second possible explanation is by the transport of founder specimens in ship's ballast water or in the fouling growth of ship's hullls

Map 4 Issued from : C.A. Jacoby & M.J.Y. Youngbluth in Mar. Biol., 1983, 76. [p.79, Fig.1 A]
Mating sequence of Pseudodiaptomus acutus.
Pair is shown: M male (RA: right A1 grasps the caudal rami of a female F).

Map 5 Issued from : C.A. Jacoby & M.J.Y. Youngbluth in Mar. Biol., 1983, 76. [p.83, Fig.2 A]
Mating sequence of Pseudodiaptomus acutus.
Correctly positioned male (AM) on a conspecific female (AF) from the Indian River lagoon near Fort Pierce, Florida, USA.
RL: position of the male"s right P5 relative to the female"s genital somite (GS).

Map 6 Issued from : C.A. Jacoby & M.J.Y. Youngbluth in Mar. Biol., 1983, 76. [p.83, Fig.2 B]
Improper copulatory position in Pseudodiaptomus heterospecific pairs: P. acutus male (AM) posteriad on a female P. cokeri (CF).

Map 7 Issued from : C.A. Jacoby & M.J.Y. Youngbluth in Mar. Biol., 1983, 76. [p.83, Fig.2 C]
Improper copulatory position in Pseudodiaptomus heterospecific pairs: P. cokeri male (AM) anteriad on a female P. acutus (CF).

Map 8 Issued from : C.A. Jacoby & M.J.Y. Youngbluth in Mar. Biol., 1983, 76. [p.83, Fig.2 D]
Improper copulatory position in Pseudodiaptomus heterospecific pairs: misplaced spermatophore (S) of P. coronatus attached to a female P. acutus (AF); spermatophore should be attached to the female"s genital somite (GS)..

Map 9 Issued from : C.A. Jacoby & M.J.Y. Youngbluth in Mar. Biol., 1983, 76. [p.81, Table 2].
Pseudodiaptomus acutus life history from the Indian River lagoon near Fort Pierce, Florida, USA.

In monocultures of seawater: salinity 34-36 per 1000, 24-26*C.
Nota: After the authors, the three species P. acutus, P. cokeri and P. pelagicus, have similar life histories. These species are demersal, they move near or onto the substratum during the day and migrate into the water column at night.Two of these species P. acutus and P. cokeri are sympatric in the Caribbean (Bowman, 1978) and should exhibit at least one reproductive isolating mechanism. The third species P. pelagicus, is the only member of the genus found along the eastern and Gulf coasts of North America.

Map 10 Issued from : C.A. Jacoby & M.J.Y. Youngbluth in Mar. Biol., 1983, 76. [p.82, Table 3].
Pseudodiaptomus sp. Characteristics of mating behavior for heterospecific and conspecific pairs between P. acutus, P. pelagicus and P. cokeri from the Indian River lagoon near Fort Pierce, Florida, USA.

In monocultures of seawater: salinity 34-36 per 1000, 24-26*C.