Harryplax severus and the Twenty-year-old Secret POSTED ON January 26, 2017 BY Clarisse Tan A secret that evaded detection for almost 20 years has finally been uncovered, with the discovery of Harryplax severus. Sorry to disappoint all the ‘Potterheads’ out there, but this is not a synopsis of a new Harry Potter spin-off. Rather, it is a tale of how a new species of crab was discovered by LKCNHM researchers, Dr. Jose C. E. Mendoza and Prof. Peter K. L. Ng, almost twenty years since it was initially collected. Frontal view; male paratype of Harryplax severus. The new crab species (also in a new genus) was described in a scientific article, which was published in the journal Zookeys and made available to the public last Tuesday (24 Jan. 2017, local time). [see: https://doi.org/10.3897/zookeys.647.11455] Seaside Exploration The crab was found in the late 1990’s in the coral reef rubble on the Pacific island of Guam by Harry Conley, a former US marine. Mr. Conley started to frequent this western Pacific island in the 1980’s in search of seashells, but his forays into the reefs yielded not only seashells, but also crabs and other creatures, which formed a sizeable personal collection. After Harry Conley’s death in 2002, his crab collection was presented to Prof. Ng by Dr. Gustav Paulay (then with the University of Guam) for further study. Many of these specimens were eventually shown to be new or rare species, with several resulting scientific publications. Two small specimens, however, were somehow overlooked and would remain in the collection of the LKCNHM until they were re-examined in early 2015 by the museum’s crustacean curator, Dr. Mendoza. Together with Prof. Ng, they determined that the crabs belonged to a new genus and species based on several unique characteristics in their anatomy. Dorsal view; male paratype of Harryplax severus. This tiny crab (7.62 mm long by 5.08 mm wide) has adaptations such as small eyes, well-developed antennae, and long, slender legs, which help it feel quite at home in the dark cavities amidst the reef rubble. Potterhead’s Wish Why the name Harryplax severus, then? Well, the genus name, Harryplax, was primarily chosen in honour of the crab’s original collector, Mr. Harry Conley, whose collection of ‘critters’ found in the rubble beds of Guam have contributed greatly to the field of marine science. The name also alludes to a famous pop culture namesake, Harry Potter, the main protagonist of the fantasy novel series by J. K. Rowling, whose magical skills are likened to Mr. Conley’s ability to find rare and fascinating creatures. The species name, severus (Latin for ‘harsh’, ‘rough’ and ‘rigorous’), highlights the tough and strenuous steps undertaken to collect the crab. Furthermore, it alludes to yet another namesake from the Harry Potter series, Professor Severus Snape, a character described by Dr. Mendoza as “notorious and misunderstood”. Just like how Professor Snape managed to conceal one of the most important secrets in the story, the new species of crab has also been able to evade discovery for almost 20 years since its initial collection. LKCNHM Researchers; Prof. Peter Ng (left) and Dr. Mendoza (right). A self-confessed ‘Potterhead’, Dr. Mendoza could not pass up the opportunity to name the new discovery after characters from the popular series, a move gamely accepted by Prof. Ng, who knew Mr. Conley personally and felt that he would have appreciated the connection. We look forward to more interesting discoveries by Dr. Mendoza and Prof. Ng in the future! Original article: Mendoza JCE, Ng PKL (2017) Harryplax severus, a new genus and species of an unusual coral rubble-inhabiting crab from Guam (Crustacea, Brachyura, Christmaplacidae). Zookeys, 647: 23–35.