The present specimens from Egypt belong to the Polyonyx sinensis group defined by Johnson (1958) based on the following characters: the carapace lacks spines on the lateral margins, the chela with various degrees of setation on the dorso-anterior surface, and the ambulatory dactylus
has the dorsal claw being much smaller than the ventral claw (see Osawa et al.
A difference was found regarding the propodus and dactylus
between the species.
6G) Basal endite with 2 long spines; vestigial dactylus
Chelipeds and ambulatory legs robust, compressed; chelipeds shorter than pereiopods 2-4; hand short, wide, and nearly quadrate, dactylus
wider than pollex and strongly curved.
Ventral margin of propodus including fixed finger, shorter than merus, with 1 spiniform seta at dactylus
For maxilliped 3, both the dactylus
and propodus were removed from the endopod.
1986); for Solen dactylus
in Persian Gulf, Iran (Saeedi et al.
Lolliguncula argus is characterized by mantle short, bluntly pointed posteriorly; fins small, nearly elliptical in outline; length about 25% of mantle length; tentacles short, compressed; buccal suckers absent; arm suckers with about five blunt teeth on distal margin of sucker rings; distinct manus and dactylus
present but carpus absent (Brakoniecki & Roper, 1985).
When the Mxp3 endopods collect sediment, they start by pressing the dactylus
and sometimes also the propodus into it (Fig.
2005b) in the Ria de Corcubion (Galicia, northwest Spain), 0.3 (g/g dry shell mass) in Solen dactylus
(Cosel, 1989) (Saeedi et al.
The photophores in the dactylus
of the 3rd maxilliped are located along its posterior (ventral) surface towards the lateral edge, and they are organized in a single row [ILLUSTRATION FOR FIGURE 1 OMITTED].
MXP3 obliquely placed on buccal cavity, ischium and merus indistinguishably fused, palp of three articles, joined end to end; carpus larger than propodus and dactylus
combined, propodus extending distally, small dactylus
distally inserted on ventral margin of propodus.
has 4 rows of suckers (diameter, 0.2 mm) at the tip of the tentacle, and the rings have 40 teeth (Fig.