Orcovita Ng & Tomascik 1994
Creators: name: Davie, Peter J. F.
name: Ng, Peter K. L.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Varunidae
Orcovita

description: KEY TO THE GENUS ORCOVITA   
1. Carapace appearing distinctly rectangular; posterolateral margins almost straight, subparallel, not distinctly convergent towards posterior carapace margin..................................................... 2  
– Carapace appearing more hexagonal; posterolateral margins concave, distinctly convergent towards posterior carapace margin.................................................................................... 3  
 2. Junction between antero- and posterolateral margins rounded; posterolateral margin smooth; lengths of 3P and 4P propodus 4.3 and 3. 1 times width, respectively, lengths of 3D and 4D 7.8 and 5.5 times width, respectively (Kakaban: Indonesia)................................................................................. O. saltatrix   
 – Junction between antero- and posterolateral margins angular; posterolateral margin granulated; lengths of 3P and 4P 5.4 and 3.7 times width, respectively, lengths of 3D and 4D 16.1 and 6.6 times width, respectively (Coron: Philippines)............................................................................................... O. angulata   
3. Male chela with thick patch of setae at base of gape; exorbital tooth always clearly separated from rest of anterolateral margin by deep, distinct cleft, margin never entire ……………………………………………… 4  
– Male chela without an obvious thick patch of setae at base of gape (at most some sparse short setae along edge; exorbital tooth separated from rest of anterolateral margin by small cleft, sometimes absent, with margin appearing almost entire...... 8  
4. Anterolateral margins with 2 teeth behind exorbital angle (second may be reduced to only a broad lobe).................................. 5  
 – Anterolateral margins with only a single distinct tooth behind exorbital angle (Loyalty Islands)...................... O. mcneiceae   
 5. Carapace relatively broad (ca. 1.4 times wider than long); ambulatory legs relatively longer, more slender (4M ca. 5.7 times longer than wide) (Niue)......................... O. gracilipes   
– Carapace narrower (ca. 1.2 times wider than long); ambulatory legs relatively shorter (4M ≤4.3 times longer than wide).... 6  
 6. Anterolateral teeth both acute; ambulatory legs relatively short, stout (4M 3.9 times longer than wide); sixth male abdominal somite about 2.3 times wider than long; male telson 1.5 times length of sixth abdominal somite........................ O. holthuisi   
– Anterolateral teeth broadly rounded; ambulatory leg proportions not as above; sixth male abdominal somite about twice as wide as long; male telson 1.1-1.2 times length of sixth abdominal somite.................................................................................... 7  
 7. Anterolateral teeth both clearly defined, similar in prominence (Ryukyus: Japan).................................................... O. miruku   
 – First anterolateral teeth deeply notched, prominently projecting, second tooth in form of broad lobe, not defined by distinct notch (Christmas Is.)......................... O. orchardorum, new species   
8. Ambulatory legs relatively long, slender, length of 3P about 5 times width or more.............................................................. 9  
 – Ambulatory legs relatively shorter, length of 3P 4.2 times width, lengths of 3D and 4D 9.1 and 6.2-6.9 times width, respectively (Panglao: Philippines)............................................. O. fictilia   
 9. Supraorbital margin relatively straight, without distinct lateral concavity such that exorbital tooth low, not appearing markedly produced; anterolateral tooth of carapace marked by only indistinct notch, or obsolete; length of 3P 5.2 times width, lengths of 3D and 4D 12.9 and 7.6 times width, respectively; small species (<15 mm c.b.) (Guam).................. O. mollitia   
 – Supraorbital margin sinuous, markedly concave laterally such that exorbital tooth appears more prominently produced; single anterolateral tooth of carapace marked by strong V-shaped notch; length of 3P 4.8 times width, lengths of 3D and 4D 11.0 and 6.4 times width, respectively; larger species (> 15 mm c.b.) (Christmas Is.)..................................... O. hicksi, new species
description: Published as part of Davie, Peter J. F. & Ng, Peter K. L., 2012, Two New Species Of Orcovita (Crustacea: Decapoda: Brachyura: Varunidae) From Anchialine Caves On Christmas Island, Eastern Indian Ocean, pp. 57-70 in Raffles Bulletin of Zoology 60 (1) on page 66, DOI: 10.5281/zenodo.4508467