Species New to Science

Etymology. From the combination of the Latin “parvus” (= small, short) and “rostris” (= front), in reference to the short rostrum in the new species. Used as a noun in apposition. 

Tomoyuki KOMAI and Chong CHEN. 2024. A New Species of the thorid shrimp Genus Lebbeus White, 1847 (Decapoda: Caridea) from the Amami Rift hydrothermal vent field in the Ryukyu region, Japan.  Zootaxa. 5523(2); 254-268. DOI: doi.org/10.11646/zootaxa.5523.2.7

A new genus and species of the family Pseudocyclopidae, Sipadantonius roihani gen. et sp. nov., was described based on specimens collected using a light trap in the marine cave of Sipadan Island, Sabah, Malaysia. The new genus is most related to Pinkertonius, primarily based on the similarity observed in the armament of ancestral segment IV of the male antennules, the armament of the female P5 Exp-3, the segmentation of the male P5, the armament of the maxillular basal exite, and the relative length of the ancestral segment XXVII of the antennules. Nevertheless, it distinguishes itself from Pinkertonius and all other genera of the family by the absence of the lateral seta of the basis of all swimming legs, the presence of an inner seta on the coxa of the female P5, the reduction of furcal setae I and III, as well as the specific armament of the ancestral segment XX of the antennules and the maxillular coxal endite. The female of Sipadantonius roihani gen. et sp. nov. has aesthetascs on the ancestral segments IV and XX of the antennules, as well as six setae on the maxillular coxal endite, exhibiting the most plesiomorphic characteristics of the family Pseudocyclopidae. The latter characteristic has not been recorded in the order Calanoida. It was hypothesised that the new species was a particle feeder living in the pelagic zone of the marine cave. The existence of the new species supported the assumption that the regional distribution of the family Pseudocyclopidae exhibited the Tethyan track, which might have been the subsequent result of the colonisation of the habitats prior to the closure of the Tethys Sea.

Key words: Crustacea, Southeast Asia, systematics, taxonomy, Zooplankton

Chaichat Boonyanusith, Koraon Wongkamhaeng and Abdul-Rahim Azman. 2024. Sipadantonius roihani gen. et sp. nov., A New Genus and Species of Pseudocyclopidae Giesbrecht, 1893 (Copepoda, Calanoida) from the marine cave “Turtle Tomb” of Sipadan Island, Sabah, Malaysia. ZooKeys. 1219: 303-329. DOI: doi.org/10.3897/zookeys.1219.133132

 A new stygobiotic species of the genus Proasellus Dudich, 1925 (Crustacea: Isopoda: Asellidae), Proasellus abini sp. n., is described from the hyporheic habitats and groundwater of the Abin River basin, located in the southwestern foothills of the Caucasian Ridge. The new species is morphologically and genetically close to Proasellus linearis Birštein, 1967, known from the Evstafiev Sсhel (=Ashamba River) near Gelendzhik. Data on phylogeny, ecology and feeding of the species and other SW Caucasian species of the genus are also presented in the paper.

KEY WORDS: Crustacea, diversity, Proasellus, new species, hyporhea, stygobiotic, southwestern Caucasus, Russia.

 Proasellus abini sp. n.

 

Etymology. Cherax rayko n. sp. is named after Rayko Eloy Lukhaup, the son of the first author. Rayko was very present in the process of the description, providing love and understanding.

 Ecology. It is endemic to the Bian River drainage basin and its tributaries. One of the creeks harboring these crayfish is shallow (20–100 cm) with a moderate flow. The temperature is around 25–26 °C. In most parts, no water plants are present. The substrate of the creek is silt or sand and soil mostly covered with silt and detritus. Crayfish hide in short burrows in the riverbank, under larger rocks, or in detritus that is present in all the parts of the creek. The creek is surrounded by forest. To improve the knowledge of the distribution of this species, more field surveys will be necessary.

 Common name. As the common name for this crayfish, we propose the Tiger Crayfish, as it is already available under this name in the pet trade. 

Etymology. C. phing n. sp. is named in honor of Liauw Pauw Phing, a crayfish enthusiast, for his noteworthy contribution to the knowledge of the crayfish of Papua. His continuing effort to search and find unknown species is very needed work for our better understanding of the crayfish of this region.

Common name. As a common name for this crayfish, we propose the Green Hornet Crayfish, as it is already available under this name in the pet trade.  

  

 Christian Lukhaup, Rury Eprilurahman and Thomas von Rintelen. 2024. Two New Species of Crayfish of the Genus Cherax (Crustacea, Decapoda, Parastacidae) from Western and Eastern Indonesian New Guinea. Arthropoda. 2(4); 264-293. DOI: doi.org/10.3390/arthropoda2040019 

A new species of spider crab is described based on a single specimen collected from the Veraval fishing harbour, Gujarat, north-west coast of India, Arabian Sea. Globally nine species of spider crabs were reported of which four, Phalangipus filiformis, P. hystrix, P. indicus and P. longipes were documented from Indian waters. The new species, P. somnathensis sp. nov. differs from most species of the genus, based on the presence of blunt spines over the lateral & dorsal margin of the carapace, by the intestinal region being produced into a sharp spine, and by possessing a unique shape of male pleopod, i.e., branched into two lobes distally. The newly discovered species is compared with its congeners.