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This ventral view of the head shows that the first pair of pereopods, held closely below the head in this view, is subchelate.
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In this side view of the carapace, the short rounded rostrum and two median dorsal spines can be seen. The dorsal profile of the carapace is highest at the posterior median spine and descends anteriorly all the way to the rostrum in a female, while in the male the dorsal profile remains high until the anterior median spine, then descends to the rostrum. From this view and the animal's size I conclude that this is a female. Also note that pereopod 5 (the last walking leg) does not have a broad and flattened dactyl. On the side of the carapace can be seen the light-brown submedian spine, and a hepatic spine just below and forward of it.
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The many spines and setae and the disruptive coloration of the carapace of this species makes it hard to see structures up close. This is a dorsal view of the carapace, with the head facing right. The two eyes can be seen on the right. Between them is the small rostrum, then the mid-dorsal ridge runs back to the left. The first mid-dorsal spine is visible in the light area at the left of the picture. In front of the mid-dorsal spine and directly behind the eyes on each side is a single sub-median spine on each side, colored light brown and just to the left of center in this view.
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This side view of abdominal segments 2-4 shows that there are no ventrally-directed spines on segments 1-3 and no prominant longitudinal mid-dorsal ridge on segments 3-5. The first and third pleura have a depression that the larger 2nd pleuron fits over.
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This dorsal view of the head shows the antennal scale (2nd antenna). Note that the lamella of the scale extends past the antennal spine.
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Metacrangon munita, about 4 cm long, captured at 75 m depth in the San Juan Channel (Photo by Dave Cowles, July 2008 )
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