In addition, the smooth and glossy 4th abdominal segment
(second gastral segment) of B.
The relationship between the length of the propodus of the first cheliped or the length of the pleuron of the second abdominal segment
and body size (CL) of shrimps was examined using the allometric model y = [ax.sup.b] (Hartnoll, 1978, 1982).
fountaineae is coloured sky-blue without a hint of green, the same colour as the blue that occurs on the eighth abdominal segment
(Dijkstra and Lewington 2006).
less rugose, with a continuous fine medial carina.
3D, E, F): Strikingly protruding, the exerted part (measured diagonally) nearly as long as abdominal segment
VII, with general facies of a triangular bill with rounded apex.
This segment is separated from the subsequent abdominal segments
by a thin septum that was present in the larva (Fig.
8 black; a long brown-red transverse bar on posterior margin.
Chaetotaxia on abdominal segments
. Organ Long, Short, siender setae spine-like setae Abdominal segment
I Prescutum 4 2 Subscutum Absent Absent Scutum 8 16 Scutellum 10 10 Abdominal segment
II Prescutum 4 16 Subscutum 1 3 Scutum 10 35 Scutellum 7 28 Abdominal segment
III Prescutum 4 22 Subscutum 1 3 Scutum 8 44 Scutellum 8 31 Abdominal segment
IV Prescutum 24 4 Subscutum 1 3 Scutum 8 39 Scutellum 10 33 Abdominal segment
V Prescutum 4 25 Subscutum 1 3 Scutum 19 40 Scutellum 10 34 Abdominal segment
VI Prescutum 4 33 Subscutum 1 3 Scutum 19 28 Scutellum 10 15 Abdominal segment
VII (2 row).
Antennae very long and filiform, reaching to abdominal segment
III in females and longer than body in males.
1A); antennal segment IV longer than 1.00; hemelytral membrane in the macropterous form almost reaching apex of last abdominal segment
, in brachypterous form reaching posterior border of abdominal segment
III or anterior border of IV; femora not granulate, sparsely clothed with semidecumbent, silvery, bristle-like setae; maximum width of abdomen wider than 4.60.
Mature larvae of Nearctic Rhantus have been described as having cerci (urogomphi) that are as long as or longer than the last (eighth) abdominal segment