3.13 Primno macropa
Guerin-Meneville, 1836
Primno macropa Guerin-Meneville, 1836: p. 4,
pl. 17 fig. la-f- Hurley, 1955: p. 172, figs. 219235 - Bowman, 1978: p. 3, figs. 1-2, 3a-c, 4 -
Bowman, 1985: p. 123, fig. 1 a-k.
Body length -
females: 5.2-11.5 mm ( 6 specimens)
male: 6.5 mm (1 specimen)
Female. Body compressed with evident middorsal spines. Head deeper than long. Al with 2
articles including the single pedunculated artiele; flagellum !-articulate, wider proximally. A2
rudimentary. P5 with oval carpus, straight posterior margin and acute postero-distal corner;
anterior margin of carpus strongly serrated with
about 14 short and long teeth; proximal tooth
shorter. P6 propodus armed with spine on anterior margin and minute spinules on posterior
margin. P7 with posterior margin of hasis slightly concave; anterior margin convex and with
very rough surface; digitiform dactylum with
ring of apical spines. 3rd epimeral plate with
acute postero-distal corner, preceded by a feeble
concavity.
Family Phrosinidae
Male. Al with long, filiform flagellum. A2 similar to A 1, but longer.
Remarks
According to Bowman (1978), the shorter proxima! tooth on the anterior margin of the carpus of
the P5 and the spinous margins of the P6 propus
render the identification of P. macropa relatively
easy.
Distribution
The species is almost cosmopolitan in its distribution (Zumelzu 1980), even though it prefers
subtropical areas (Dick 1970). According to
Thurston (1976), it is lacking only in the Arctic
bas in. In the Straits of Magellan, it was frequently sampled at the mouth of the Pacific entrance.
It was not found beyond St. 11 near Carlos III Island. In all areas where it was sampled, it had a
wide distribution range, from the surface to
500m.
Guerin-Meneville, 1836
Primno macropa Guerin-Meneville, 1836: p. 4,
pl. 17 fig. la-f- Hurley, 1955: p. 172, figs. 219235 - Bowman, 1978: p. 3, figs. 1-2, 3a-c, 4 -
Bowman, 1985: p. 123, fig. 1 a-k.
Body length -
females: 5.2-11.5 mm ( 6 specimens)
male: 6.5 mm (1 specimen)
Female. Body compressed with evident middorsal spines. Head deeper than long. Al with 2
articles including the single pedunculated artiele; flagellum !-articulate, wider proximally. A2
rudimentary. P5 with oval carpus, straight posterior margin and acute postero-distal corner;
anterior margin of carpus strongly serrated with
about 14 short and long teeth; proximal tooth
shorter. P6 propodus armed with spine on anterior margin and minute spinules on posterior
margin. P7 with posterior margin of hasis slightly concave; anterior margin convex and with
very rough surface; digitiform dactylum with
ring of apical spines. 3rd epimeral plate with
acute postero-distal corner, preceded by a feeble
concavity.
Family Phrosinidae
Male. Al with long, filiform flagellum. A2 similar to A 1, but longer.
Remarks
According to Bowman (1978), the shorter proxima! tooth on the anterior margin of the carpus of
the P5 and the spinous margins of the P6 propus
render the identification of P. macropa relatively
easy.
Distribution
The species is almost cosmopolitan in its distribution (Zumelzu 1980), even though it prefers
subtropical areas (Dick 1970). According to
Thurston (1976), it is lacking only in the Arctic
bas in. In the Straits of Magellan, it was frequently sampled at the mouth of the Pacific entrance.
It was not found beyond St. 11 near Carlos III Island. In all areas where it was sampled, it had a
wide distribution range, from the surface to
500m.