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Vol. 48 No. 5, 2009
A New Species of Lysmata (Crustacea, Decapoda, Hippolytidae) from the Pacific Coast of Panama, with Observations of Its Reproductive Biology
Arthur Anker1, Juan Antonio Baeza1,2, and Sammy De Grave3,*
1Instituto
Smithsonian de Investigaciones Tropicales, Apartado 0843-03092, Balboa,
Ancón, Panamá, República de Panamá; Smithsonian Tropical Research
Institute, Naos Unit 0948, USA. E-mail:arthuranker7@yahoo.co
2Smithsonian Marine Station at Fort Pierce, 701 Seaway Drive, Fort Pierce, FL 34949, USA. E-mail:baezaa@si.edu
3Oxford University Museum of Natural History, Parks Road, Oxford OX1 3PW, United Kingdom
Arthur Anker, Juan Antonio Baeza, and Sammy De Grave (2009) Lysmata holthuisi
sp. nov., a new peppermint shrimp, is described from Taboga I., on the
Pacific coast of Panama. In addition to the type locality, L. holthuisi
sp. nov. occurs in the vicinity of Panama City and around some islands
relatively close to the mainland (Las Perlas and Coiba). The new
species can be distinguished from other species of Lysmata
by the rostrum bearing 6 (occasionally 5 or 7) dorsal and 2 (rarely 3)
ventral teeth; the presence of setae between the dorsal rostral teeth;
an acute welldeveloped pterygostomial tooth; a stylocerite overreaching
the 1st antennular segment; the accessory branch of the lateral
antennular flagellum consisting of 6 or 7 free segments; the marked
segmentation of the merus of the 2nd pereiopod; the absence of a
posteroventral tooth on the 4th pleuron; and by its diagnostic color
pattern, characterized by red longitudinal stripes on the carapace and
abdomen, and conspicuous bright yellow and red markings on or near the
accessory branch of the lateral antennular flagellum. Among the
eastern Pacific species, L. holthuisi sp. nov. appears to be most closely related to L. argentopunctata Wicksten and L. chica Wicksten. Anatomical observations, field population studies, and laboratory experiments indicate that L. holthuisi sp.
nov. is a protandric simultaneous hermaphrodite, with an early male
phase followed by a functional simultaneous hermaphroditic phase.
Key words: Lysmata, Shrimp, New species, Eastern Pacific, Hermaphroditism.
*Correspondence: E-mail:sammy .degrave@oum.ox.ac.uk
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