Corresponding author: José Salgado-Barragán (
Academic editor: S. De Grave
Two new species of the family
Salgado-Barragán J, Ayón-Parente M, Zamora-Tavares P (2017) New records and description of two new species of carideans shrimps from Bahía Santa María-La Reforma lagoon, Gulf of California, Mexico (Crustacea, Caridea, Alpheidae and Processidae). ZooKeys 671: 131–153.
The phylogenetic relationships of
The Santa María-La Reforma coastal lagoon is one of the largest coastal systems along the NW coast of Mexico. This coastal complex has been identified as one of the richest and most productive in the region, with great considerable importance for the shrimp and fish captures in the Gulf of California (
A number of specimens of caridean shrimps were collected during surveys of infaunal invertebrates at several locations of the Bahía Santa María-La Reforma lagoon. After a detailed review of the specimens, we determined that they belong to five species of the genus
From June 2013 to March 2015, a series of surveys was carried out in Bahía Santa María-La Reforma lagoon (SE Gulf of California), in order to collect infaunal crustaceans. Collecting sites were characterized by mud, sand and sandy-mud bottoms with profuse burrow openings of mud shrimps identified as
Total genomic DNA of alpheids from Bahía Santa María-La Reforma and from the Regional Collection of Marine Invertebrates was extracted from muscle tissue of the walking legs. DNA sequences were obtained from two regions, 16S and
Sequence data of
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Sequences authors: * Williams et al., 2001;
+ Bracken et al., 2009;
¥ Almeida et al., 2013;
§ Bracken-Grissom et al., 2014;
£ this study.
Holotype: Male (
Ocular hoods unarmed. Antepenultimate segment of third maxilliped broad. Scaphocerite with concave lateral margins, distolateral tooth overreaching the distal margin of the inner blade, inner blade almost reaching the distal end of antennular peduncle. Major
Dactylus of
Ischium of fifth pereopod (Fig.
Soft mud with gravel composed of shells and rocks, in intertidal.
Creamy-white with irregular sparse olive green to light brown patches on dorsal surface of carapace, abdomen and telson; uropodal endopodite and distal lobe of exopodite olive green to light brown, proximal lobe of exopodite creamy-white; patches on abdominal plates tend to be more dense towards the rear; first pereopod olive green. No clear differences were observed between sexes (Fig.
Only known from Bahía Santa María-La Reforma coastal lagoon, Sinaloa, Mexico.
The species is named after Dr. Margarita Hermoso Salazar in recognition of her contributions to the knowledge of Mexican carideans.
Body structures in
In nine of the twelve specimens the antepenultimate segment of the third maxilliped is approximately 2.5 times as long as broad, with a sinuous carina on the inner surface bearing long setae and the exopod not reaching the distal end of the antepenultimate segment (Fig.
The new species and
The
Holotype: Male (
Frontal margin of carapace broadly rounded, weakly produced, without dorsal crests. Antenna with carpocerite longer than scaphocerite, slightly shorter than antennular peduncle. Major
Frontal margin of
Mouthparts not dissected, typical for genus in external view. Third maxilliped (Fig.
Sandy beach, associated with burrows of
Known only from Meléndez Island, Bahía Santa María-La Reforma, Sinaloa, Mexico.
The name of the species is derived from Meléndez Island, the type locality.
The 16S matrix of
The phylogenetic analysis presented here is a partial contribution to establish a phylogeny of the genus due to the almost total absence of genetic information from other species described in previous works, however this approach and morphological analysis provide sufficient information to recognize that
Two males (
Previous work and this study agree that this species appears to be associated with mangrove forest (Ríos and Carvacho 1983;
Estero Mulegé, Baja California Sur (type locality), Bahía Santa María-La Reforma and Mazatlán, Sinaloa, and Manzanillo, Colima, Mexico, to Bahía Málaga, Colombia (
We could only observe very small crests on carapace of the two males, which were absent in all females. In our opinion, the presence of these structures could be related to the size of the specimens. Specimens of
1 female (
Recorded from San Diego, California, and Gulf of California to Naos Island, Panama and Galapagos Islands (
According to
One female (
Recorded from San Benito Island, Baja California and the Gulf of California including Bahía Santa María-La Reforma to Paitilla, Panama and Galapagos Islands (
This is the second record of the species from the Gulf of California, and the first record of a specimen found inhabiting together with a callianasid shrimp (
Authors are indebted to Margarita Hermoso-Salazar who helped us in the identification of the new species of