A new species of wood-boring bivalve (Mollusca: Xylophagaidae) from the Eastern Arabian Sea

2022 ◽  
Vol 52 (1) ◽  
Author(s):  
Paravanparambil Rajakumar Jayachandran ◽  
Marcel Velásquez ◽  
Mantodi Jima
Zootaxa ◽  
2020 ◽  
Vol 4816 (2) ◽  
pp. 229-234
Author(s):  
VINAY P. PADATE ◽  
BEE YAN LEE ◽  
SHERINE SONIA CUBELIO

A new species of spider crab is described from two male specimens collected from the southeastern Arabian Sea. This species differs from its congeners in the absence of uograstric granule on carapace, the presence of two granules along lateral margin of carapace at branchial region, the presence of granules on P2–P4 dactyli and the constricted distal tip of the male first gonopod. 


2016 ◽  
Vol 63 (3) ◽  
Author(s):  
E. M. Abdussamad ◽  
Sandhya Sukumaran ◽  
Arun K. O. Ratheesh ◽  
K. Mohamed Koya ◽  
K. P. S. Koya ◽  
...  

Scomber indicus, a new species of mackerel is described based on the specimens collected from the eastern Arabian Sea. The species is differentiated from its nearest congener Scomber australasicus, in having 29-32 gill rakers on lower limb of first gill arch, posteriormost part of hypohyal blunt, with presence of a pit between the hypohyal and the ceratohyal and also in having a posteriorly directed haemal spine which is deeply curved in the basal region. Genetic differentiation and divergence between the newly described species and the 4 valid species of the genus Scomber viz., S. scombrus, S. japonicus, S. australasicus and S. colias were compared using cytochrome c oxidase 1 and cytochrome b gene sequences. The new species was found closest to S. colias followed by S. japonicus with Kimura 2 parameter (K2P) values of 1.4 and 1.8% respectively. In the phylogenetic tree, sequences of Scomber indicus sp. nov. formed a distinct well separated clade with significant bootstrap values as compared to the sequences of S. scombrus, S. japonicus, S. australasicus and S. colias indicating their distinctiveness and separate species status.  


Author(s):  
Yun Hsiao ◽  
Yali Yu ◽  
Congshuang Deng ◽  
Hong Pang

A new species of Ripiphoridae Gemminger & Harold, 1870, Archaeoripiphorus nuwa gen. et sp. nov., is described and illustrated from a well-preserved impression fossil from the Middle Jurassic Jiulongshan Formation collected at Daohugou Village, Shantou Township, Ningcheng County, Inner Mongolia, China, representing the oldest documented occurrence of the Ripiphoridae described from the Mesozoic era. It shares several characters belonging to two basal ripiphorid subfamilies (Pelecotominae and Ptilophorinae), but it cannot be attributed to either of them and is herein placed as Subfamily incertae sedis. An overall similarity between Archaeoripiphorus gen. nov. and Recent Pelecotominae and the occurrence of wood-boring beetles in the same Formation implies a similar parasitoid host preference in xylophagous beetles for A. nuwa gen. et sp. nov., putting a spotlight on a potential host-parasitoid relationship in the Mesozoic.


Zootaxa ◽  
2012 ◽  
Vol 3248 (1) ◽  
pp. 25 ◽  
Author(s):  
L. J. COOKSON ◽  
S. M. CRAGG ◽  
I. W. HENDY

In a survey of the fauna inhabiting fallen wood in Rhizophora-dominated forests of an archipelago of small islands to thesouth of Sulawesi, in Indonesia, four species of limnoriid (Limnoria insulae, L. pfefferi, L. sellifera new species and L.unicornis) were found feeding on the wood. L. sellifera is characterised by a saddle-shaped pleotelson that is smaller thanpleonite 5, transverse rows of teeth-like tubercles dorsomedially on pleonites 2–4 and a uropod with relatively small ex-opod, two rows of pointed tubercles on the peduncle, and one row on the endopod. L. sellifera is the second species ofLimnoria to be found exclusively on mangrove wood. The cephalon and pereon of the four species of limnoriids are anatomically similar, but they differ markedly in features of pleonite 5, the pleotelson and the uropods.


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