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Petrarctus rugosus   (Milne-Edwards, 1837)

Hunchback locust lobster

Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Petrarctus rugosus  AquaMaps  Data sources: GBIF OBIS
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Petrarctus rugosus

Classification / Names Common names | Synonyms | CoL | ITIS | WoRMS

Malacostraca | Decapoda | Scyllaridae

Environment: milieu / climate zone / depth range / distribution range Ecology

Benthic; depth range 20 - 200 m (Ref. 4), usually 20 - 60 m (Ref. 4).  Tropical; 28°N - 21°S, 34°E - 148°E (Ref. 4)

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

Indo-West Pacific: from Red Sea, East Africa and Madagascar to Japan, Taiwan, the Philippines, Indonesia and N.E. Australia.

Length at first maturity / Size / Weight / Age

Maturity: Lm ?  range ? - ? cm Max length : 2.3 cm CL male/unsexed; (Ref. 89665); common length : 6.0 cm TL male/unsexed; (Ref. 4); common length :6 cm TL (female)

Short description Morphology

The carapace has the median teeth before the crevical groove blunt and inconspicuous: the rostral tooth is reduced to a tubercle, the pregastric tooth is replaced by a double row of 1 or 2 tubercles and a few inconspicuous median tubercles. The gastric tooth is the most conspicuous, it isbroad and blunt and bears a double row of tubercles. The surface of the carapace is very uneven and the tubercles are high. Between the postrostral and branchial carinae there are a few tubercles and many smooth areas. The abdomen shows a distinct median longitudinal carina on somites 2 to 5, that of somite 3 is by far the highest, and (like the one fo somite 4) bears numerous tubercles laterally. Somite 1 is quite smooth, and has the transverse groove only slightly noticeable in the extreme lateral parts. The exposed part of the following somites show no arborescent pattern, but in each somite there is a wide transverse groove there. In somite 2, both before and behind this groove there is a perfectly smooth broad ridge, a character in which the species differs from most others. In the following somites these ridges are tuberculate. In somites 4 to 6 the posterior margin is tuberculate. The fourth antennal segment has a sharp and high oblique median carina. Outside the carina the upper surface of the segment shows a row of tubercles. The outer margin of the segment bears 4 or 5 teeth (apical tooth of the segment not included), the inner margin has 5 to 7 teeth of irregular size. The anterior margin of the thoracic sternum is deeply U-shapedly incised. Each of the thoracic sternites bears a rounded median tubercle. The dactyli of pereiopods 3 to 5 show two short fringes of hair each. Colour: the dorsal surface of the body is greyish or purplish brown with darker spots. The distal segment of the antenna is often lighter. The first abdominal somite shows dorsally often a dark blue colour (Ref. 252).

Biology     Glossary (e.g. epibenthic)

It has lengths of 2.5 to 6 cm (males and females) and 3 to 6 cm (ovigerous females), total body length; 0.8 to 2.1 cm (males), 0.8 to 2.2 cm (females) and 1 to 2.2 cm (ovigerous females), carapace length (Ref. 4). Inhabits depths from 20 to 60 m, rarely reported from 100 to 200 m with a bottom usually sand and mud, sometimes with coral, shelly grit or rubble (Ref. 4).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Members of the order Decapoda are mostly gonochoric. Mating behavior: Precopulatory courtship ritual is common (through olfactory and tactile cues); usually indirect sperm transfer.

Main reference References | Coordinator | Collaborators

Holthuis, L.B. 1991. (Ref. 4)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 03 December 2009

CITES status (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Human uses

Fisheries: of no interest
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More information

FAO areas
Food items
Common names
Egg development
Mass conversion

Internet sources

BHL | BOLD Systems | CISTI | DiscoverLife | FAO(Publication : search) | Fishipedia | GenBank (genome, nucleotide) | GloBI | Gomexsi | Google Books | Google Scholar | Google | PubMed | Tree of Life | Wikipedia (Go, Search) | Zoological Record

Estimates based on models

Preferred temperature (Ref. 115969): 26.1 - 29.1, mean 28.1 (based on 1446 cells).
Price category (Ref. 80766): Very high.