Lysiosquillidae Giesbrecht, 1910

Rodrigues, Juliana L. Segadilha Thaiana G. A., 2020, The crustacean collection at the National Institute of Mata Atlântica (INMA), former Professor Mello Leitão Biology Museum (MBML), Nauplius (e 2020046) 28, pp. 1-13 : 6-7

Family Lysiosquillidae Giesbrecht, 1910

Lysiosquilla scabricauda ( Lamarck, 1818) (1 lot, 1 specimen) – Mar.

All holdings in the Crustacea collection of INMA are from Brazil (see Supplementary Material) and comprise major crustaceans groups, with a particular focus on Decapoda (98.5 %). Currently, the collection has a total of 52 species, 41 genera belonging to 26 families, consisting mainly of large taxa (> 2 cm). A total of 443 specimens were located, included in 131 lots, representing mostly the Espírito Santo carcinofauna, with a concentration around Aracruz city, including the area of Santa Cruz Marine Biology Station . Besides this, a few lots were collected in other states: four lots (eight specimens) were collected from Bahia; four lots (four specimens) from Maranhão; and three lots (three specimens) from Rio de Janeiro (Supplementary Material) .

The oldest specimen in the Crustacea collection is M. carcinus collected in August 1961 by Belmiro Perini (MBML 107) and the latest species was C. danae collected by Mikael Mansur Martinelli in January 2015 (MBML 127), at the present analysis (Supplementary Material).

Holdings were within class Malacostraca and, except for L. scabricauda (order Stomatopoda ), all specimens were from subclass Eumalacostraca. Within superorder Peracarida , only the order Isopoda (family Cirolanidae ) was represented. Within the order Decapoda , there were only two specimens of suborder Dendrobranchiata (family Penaeidae ; Fig. 2 ).

Six of the nine existing infraorders within the suborder Pleocyemata were found in the collection: Achelata , Anomura , Astacidea , Brachyura , Caridea and Stenopodidea . Among these taxa, Brachyura was the most diverse represented by 15 families (34 species; Fig. 3) in the collection; second was Caridea with four families (six species).

The family Portunidae showed the highest richness of species including eight species (42 specimens), followed by Palinuridae with five species (nine specimens). Epialtidae and Ocypodidae presented four species each (six specimens and 17 specimens, respectively). Despite being the most abundant family with 192 specimens, the Palaemonidae comprised only three species, followed by Trichodactylidae and Atyidae , which totalled 35 specimens each.

Mostly the collection consists of marine species, which were collected mainly from littoral or continental shelf localities. About 5.8 % of the species inventoried herein occur in freshwater environments, including families exclusively of this habitat such as Atyidae and Trichodactylidae . A single terrestrial brachyuran crab species ( C. guanhumi ) is stored in the collection.

Only one specimen (MBML 11, P. gundlachi ) of the total of 443 deposited in the collection (0.2 %) is currently cataloged in a published paper and none are presently databased.

Aratus pisonis (MBML 22, Mucuri River, Bahia) was discarded after the f lood that affected all zoological collections of INMA in 2000. However, as it was photographed before the disaster, it was mantained in the collections list.

Hepatus pudibundus (MBML 56) was without any information on locality thus was transferred to a didactic collection at INMA, mantaining its lot number for reference.

Four lots were listed in the hard-copy registers (MBML 42; 57; 70; 72) but were not found in the collection nor identified previously, therefore they were not included in this inventory (yet they are shown at the end of the spreadsheet highlighted in gray; see Supplementary Material).

Figures

Figure 2. Relative abundance of infraorders of Decapoda registered in the Crustacea collection of INMA.