Yuyu (Parathelphusa convexa)

Yuyu (Parathelphusa convexa) is an animal species in the Gecarcinucidae, freshwater crab and is small, a pair of scissors, the dorsal surface has a curved pattern similar to the letter V or U, is white or brown or blackish, lives in rice fields, ditches and soil on generally.

P. convexa has a carapace with a width of 30 mm, a length of 40 mm, a thick body with a width of half the carapace and bulging at the back. The anterolateral edge has a tooth on the outer side of the eye recess and two teeth as epibranchial spines which are pointed and pointed forward and inward.



The forelimb has serrations that extend from side to side and end in the center of the base of the first epibranchial spine. Slender legs, a small spine pointed at the end of each joint, near the joint with carpus joints, curved and serrated ends.

Back brown to dark. The curved pattern on the back is similar to the letter V or U with the upper side widening, connecting with the curve of the letter H at the bottom and resembling a widening hourglass pattern. The ventral side is whitish or yellowish in color with an inverted T-shaped abdomen and is segmented.

This species are often found in rice fields, ditches and irrigation canals and slow-flowing rivers. Usually preyed on by cranes and other water birds that often visit the fields. Sometimes it is consumed locally or crushed then fermented, dried in the sun and finally squeezed for oil.

TAXON

Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Superclass: Multicrustacea
Class: Malacostraca
Subclass: Eumalacostraca
Superorder: Eucarida
Order: Decapoda
Suborder: Pleocyemata
Infraorder: Brachyura
Zoosection: Eubrachyura
Zoosubsection: Heterotremata
Superfamily: Gecarcinucoidea
Family: Gecarcinucidae
Genus: Parathelphusa H. Milne Edwards (1853)
Species: Parathelphusa convexa De Man (1879)

SYNONYMS

Cancer (Thelphusa) convexus Herklots (1861)
Paratelphusa convexa De Man (1879)
Parathelphusa dentipes Heller (1862)

PUBLICATIONS

R. Eprilurahman, W. T. Baskoro, Trijoko. Keanekaragaman Jenis Kepiting (Decapoda: Brachyura) di Sungai Opak, Daerah Istimewa Yogyakarta, Biogenesis, Vol 3, No. 2, Desember 2015, hal 100-108

VERNACULAR NAME

Chinese (simplified): 隆背束腹蟹
English: Yuyu
Indonesian: Yuyu sawah, Kepiting sawah
Java: Yuyu

Aryo Bandoro
Dlium TheDlium
YouTube: https://www.youtube.com/@Dlium